In 0ee50b4753 ("namei: change filename_parentat() calling
conventions"), filename_parentat() was made to always call putname() on
the filename before returning, and kern_path_locked() was migrated to
this calling convention. However, kern_path_locked() uses the "last"
parameter to lookup and potentially create a new dentry. The last
parameter contains the last component of the path and points within the
filename, which was recently freed at the end of filename_parentat().
Thus, when kern_path_locked() calls __lookup_hash(), it is using the
filename after it has already been freed.
In other words, these calling conventions had been wrong for the
only remaining caller of filename_parentat(). Everything else
is using __filename_parentat(), which does not drop the reference;
so should kern_path_locked().
Switch kern_path_locked() to use of __filename_parentat() and move
getting/dropping struct filename into wrapper. Remove filename_parentat(),
now that we have no remaining callers.
Fixes: 0ee50b4753 ("namei: change filename_parentat() calling conventions")
Link: https://lore.kernel.org/linux-fsdevel/YS9D4AlEsaCxLFV0@infradead.org/
Link: https://lore.kernel.org/linux-fsdevel/YS+csMTV2tTXKg3s@zeniv-ca.linux.org.uk/
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Reported-by: syzbot+fb0d60a179096e8c2731@syzkaller.appspotmail.com
Signed-off-by: Stephen Brennan <stephen.s.brennan@oracle.com>
Co-authored-by: Dmitry Kadashev <dkadashev@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
The tb_test_credit_alloc_all() function had a huge number of
KUNIT_ASSERT() statements, all of which (though the magic of many many
layers of inscrutable macros) ended up allocating and initializing
various test assertion structures on the stack.
Don't do that. The kernel stack isn't infinite, and we have compiler
warnings (now errors) for the case where a stack frame grows too large.
Like it did here, by not an inconsiderable margin:
drivers/thunderbolt/test.c: In function ‘tb_test_credit_alloc_all’:
drivers/thunderbolt/test.c:2367:1: error: the frame size of 4500 bytes is larger than 2048 bytes [-Werror=frame-larger-than=]
2367 | }
| ^
Solve this similarly to the lib/test_scanf case: split out the tests
into several smaller functions, each just testing one particular tunnel
credit allocation.
This makes the i386 allyesconfig build work for me again.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
It turns out that gcc has real trouble merging all the temporary
on-stack buffer allocation. So despite the fact that their lifetimes do
not overlap, gcc will allocate stack for all of them when they have
different types. Which they do in the number scanning test routines.
This is unfortunate in general, but with lots of test-cases in one
function, it becomes a real problem. gcc will allocate a huge stack
frame for no actual good reason.
We have tried to counteract this tendency of gcc not merging stack slots
(see "-fconserve-stack"), but that has limited effect (and should be on
by default these days, iirc).
So with all the debug options enabled on an i386 allmodconfig build, we
end up with overly big stack frames, and the resulting stack frame size
warnings (now errors):
lib/test_scanf.c: In function ‘numbers_list_field_width_val_width’:
lib/test_scanf.c:530:1: error: the frame size of 2088 bytes is larger than 2048 bytes [-Werror=frame-larger-than=]
530 | }
| ^
lib/test_scanf.c: In function ‘numbers_list_field_width_typemax’:
lib/test_scanf.c:488:1: error: the frame size of 2568 bytes is larger than 2048 bytes [-Werror=frame-larger-than=]
488 | }
| ^
lib/test_scanf.c: In function ‘numbers_list’:
lib/test_scanf.c:437:1: error: the frame size of 2088 bytes is larger than 2048 bytes [-Werror=frame-larger-than=]
437 | }
| ^
In this particular case, the reasonably straightforward solution is to
just split out the test routines into multiple more targeted versions.
That way we don't have one huge stack, but several smaller ones, and
they aren't active all at the same time.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The variable 'package_size' is an unsigned long, and should be printed
out using '%lu', not '%zd' (that would be for a size_t).
Yes, on many architectures (including x86-64), 'size_t' is in fact the
same type as 'long', but that's a fairly random architecture definition,
and on some platforms 'size_t' is in fact 'int' rather than 'long'.
That is the case on traditional 32-bit x86. Yes, both types are the
exact same 32-bit size, and it would all print out perfectly correctly,
but '%zd' ends up still being wrong.
And we can't make 'package_size' be a 'size_t', because we get the
actual value using efivar_entry_get() that takes a pointer to an
'unsigned long'. So '%lu' it is.
This fixes two of the i386 allmodconfig build warnings (that is now an
error due to -Werror).
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-----BEGIN PGP SIGNATURE-----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=4SCA
-----END PGP SIGNATURE-----
Merge tag 'block-5.15-2021-09-05' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:
"Was going to send this one in later this week, but given that -Werror
is now enabled (or at least available), the mq-deadline fix really
should go in for the folks hitting that.
- Ensure dd_queued() is only there if needed (Geert)
- Fix a kerneldoc warning for bio_alloc_kiocb()
- BFQ fix for queue merging
- loop locking fix (Tetsuo)"
* tag 'block-5.15-2021-09-05' of git://git.kernel.dk/linux-block:
loop: reduce the loop_ctl_mutex scope
bio: fix kerneldoc documentation for bio_alloc_kiocb()
block, bfq: honor already-setup queue merges
block/mq-deadline: Move dd_queued() to fix defined but not used warning
-----BEGIN PGP SIGNATURE-----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=jgN5
-----END PGP SIGNATURE-----
Merge tag 'misc-5.15-2021-09-05' of git://git.kernel.dk/linux-block
Pull CDROM maintainer update from Jens Axboe:
"It's been about 22 years since I originally started maintaining the
CDROM code, and I just haven't been able to even get reviews done in a
timely fashion the last handful of years.
Time to pass it on, and Phillip has volunteered take over these
duties. I'll be helping as needed for the foreseeable future"
* tag 'misc-5.15-2021-09-05' of git://git.kernel.dk/linux-block:
cdrom: update uniform CD-ROM maintainership in MAINTAINERS file
-----BEGIN PGP SIGNATURE-----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=U7lH
-----END PGP SIGNATURE-----
Merge tag 'libata-5.15-2021-09-05' of git://git.kernel.dk/linux-block
Pull libata fixes from Jens Axboe:
"Fixes for queued trim on certain Samsung SSDs, in conjunction with
certain ATI controllers"
* tag 'libata-5.15-2021-09-05' of git://git.kernel.dk/linux-block:
libata: Add ATA_HORKAGE_NO_NCQ_ON_ATI for Samsung 860 and 870 SSD.
libata: add ATA_HORKAGE_NO_NCQ_TRIM for Samsung 860 and 870 SSDs
-----BEGIN PGP SIGNATURE-----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=QoQg
-----END PGP SIGNATURE-----
Merge tag 'for-5.15/io_uring-2021-09-04' of git://git.kernel.dk/linux-block
Pull io_uring fixes from Jens Axboe:
"As sometimes happens, two reports came in around the merge window open
that led to some fixes. Hence this one is a bit bigger than usual
followup fixes, but most of it will be going towards stable, outside
of the fixes that are addressing regressions from this merge window.
In detail:
- postgres is a heavy user of signals between tasks, and if we're
unlucky this can interfere with io-wq worker creation. Make sure
we're resilient against unrelated signal handling. This set of
changes also includes hardening against allocation failures, which
could previously had led to stalls.
- Some use cases that end up having a mix of bounded and unbounded
work would have starvation issues related to that. Split the
pending work lists to handle that better.
- Completion trace int -> unsigned -> long fix
- Fix issue with REGISTER_IOWQ_MAX_WORKERS and SQPOLL
- Fix regression with hash wait lock in this merge window
- Fix retry issued on block devices (Ming)
- Fix regression with links in this merge window (Pavel)
- Fix race with multi-shot poll and completions (Xiaoguang)
- Ensure regular file IO doesn't inadvertently skip completion
batching (Pavel)
- Ensure submissions are flushed after running task_work (Pavel)"
* tag 'for-5.15/io_uring-2021-09-04' of git://git.kernel.dk/linux-block:
io_uring: io_uring_complete() trace should take an integer
io_uring: fix possible poll event lost in multi shot mode
io_uring: prolong tctx_task_work() with flushing
io_uring: don't disable kiocb_done() CQE batching
io_uring: ensure IORING_REGISTER_IOWQ_MAX_WORKERS works with SQPOLL
io-wq: make worker creation resilient against signals
io-wq: get rid of FIXED worker flag
io-wq: only exit on fatal signals
io-wq: split bounded and unbounded work into separate lists
io-wq: fix queue stalling race
io_uring: don't submit half-prepared drain request
io_uring: fix queueing half-created requests
io-wq: ensure that hash wait lock is IRQ disabling
io_uring: retry in case of short read on block device
io_uring: IORING_OP_WRITE needs hash_reg_file set
io-wq: fix race between adding work and activating a free worker
New features:
- Improvements for the flamegraph python script, including:
- Display perf.data header
- Display PIDs of user stacks
- Added option to change color scheme
- Default to blue/green color scheme to improve accessibility
- Correctly identify kernel stacks when debuginfo is available
- Improvements for 'perf bench futex':
- Add --mlockall parameter
- Add --broadcast and --pi to the 'requeue' sub benchmark
- Add support for PMU aliases.
- Introduce an ARM Coresight ETE decoder.
- Add a 'perf bench' entry for evlist open/close operations, to help quantify
improvements with multithreading 'perf record'.
- Allow reporting the [un]throttle PERF_RECORD_ meta event in 'perf script's
python scripting.
- Add a 'perf test' entry for PMU aliases.
- Add a 'perf test' entry for 'perf record/perf report/perf script' pipe mode.
Fixes:
- perf script dlfilter (API for filtering via dynamically loaded shared object
introduced in v5.14) fixes and a 'perf test' entry for it.
- Fix get_current_dir_name() compilation on Android.
- Fix issues with asciidoc and double dashes uses.
- Fix memory leaks in the BTF handling code.
- Fix leftover problems in the Documentation from the infrastructure originally
lifted from the git codebase.
- Fix *probe_vfs_getname.sh 'perf test' failures.
- Handle fd gaps in 'perf test's test__dso_data_reopen().
- Make sure to show disasembly warnings for 'perf annotate --stdio'.
- Fix output from pipe to file and vice-versa in 'perf record/report/script'.
- Correct 'perf data -h' output.
- Fix wrong comm in system-wide mode with 'perf record --delay'.
- Do not allow --for-each-cgroup without cpu in 'perf stat'
- Make 'perf test --skip' work on shell tests.
- Fix libperf's verbose printing.
Misc improvements:
- Preparatory patches for multithreading varios 'perf record' phases
(synthesizing, opening, recording, etc).
- Add sparse context/locking annotations in compiler-types.h, also to help with
the multithreading effort.
- Optimize the generation of the arch specific erno tables used in 'perf trace'.
- Optimize libperf's perf_cpu_map__max().
- Improve ARM's CoreSight warnings.
- Report collisions in AUX records.
- Improve warnings for the LLVM 'perf test' entry.
- Improve the PMU events 'perf test' codebase.
- perf test: Do not compare overheads in the zstd comp test
- Better support annotation on ARM.
- Update 'perf trace's cmd string table to decode sys_bpf() first arg.
Vendor events:
- Add JSON events and metrics for Intel's Ice Lake, Tiger Lake and Elhart Lake.
- Update JSON eventsand metrics for Intel's Cascade Lake and Sky Lake servers.
Hardware tracing:
- Improvements for the ARM hardware tracing auxtrace support.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-----BEGIN PGP SIGNATURE-----
iHUEABYIAB0WIQR2GiIUctdOfX2qHhGyPKLppCJ+JwUCYTO8OAAKCRCyPKLppCJ+
J/N0AQCTAfxKsVyh9vjIY5vwHvNkYMDM4Wvs7TmlfXbVgKLP3AEA0wYlTyar/teI
NC6jQpipxpWASFUJbLSmU8qn/XFXwQo=
=4r0w
-----END PGP SIGNATURE-----
Merge tag 'perf-tools-for-v5.15-2021-09-04' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux
Pull perf tool updates from Arnaldo Carvalho de Melo:
"New features:
- Improvements for the flamegraph python script, including:
- Display perf.data header
- Display PIDs of user stacks
- Added option to change color scheme
- Default to blue/green color scheme to improve accessibility
- Correctly identify kernel stacks when debuginfo is available
- Improvements for 'perf bench futex':
- Add --mlockall parameter
- Add --broadcast and --pi to the 'requeue' sub benchmark
- Add support for PMU aliases.
- Introduce an ARM Coresight ETE decoder.
- Add a 'perf bench' entry for evlist open/close operations, to help
quantify improvements with multithreading 'perf record'.
- Allow reporting the [un]throttle PERF_RECORD_ meta event in 'perf
script's python scripting.
- Add a 'perf test' entry for PMU aliases.
- Add a 'perf test' entry for 'perf record/perf report/perf script'
pipe mode.
Fixes:
- perf script dlfilter (API for filtering via dynamically loaded
shared object introduced in v5.14) fixes and a 'perf test' entry
for it.
- Fix get_current_dir_name() compilation on Android.
- Fix issues with asciidoc and double dashes uses.
- Fix memory leaks in the BTF handling code.
- Fix leftover problems in the Documentation from the infrastructure
originally lifted from the git codebase.
- Fix *probe_vfs_getname.sh 'perf test' failures.
- Handle fd gaps in 'perf test's test__dso_data_reopen().
- Make sure to show disasembly warnings for 'perf annotate --stdio'.
- Fix output from pipe to file and vice-versa in 'perf
record/report/script'.
- Correct 'perf data -h' output.
- Fix wrong comm in system-wide mode with 'perf record --delay'.
- Do not allow --for-each-cgroup without cpu in 'perf stat'
- Make 'perf test --skip' work on shell tests.
- Fix libperf's verbose printing.
Misc improvements:
- Preparatory patches for multithreading various 'perf record' phases
(synthesizing, opening, recording, etc).
- Add sparse context/locking annotations in compiler-types.h, also to
help with the multithreading effort.
- Optimize the generation of the arch specific erno tables used in
'perf trace'.
- Optimize libperf's perf_cpu_map__max().
- Improve ARM's CoreSight warnings.
- Report collisions in AUX records.
- Improve warnings for the LLVM 'perf test' entry.
- Improve the PMU events 'perf test' codebase.
- perf test: Do not compare overheads in the zstd comp test
- Better support annotation on ARM.
- Update 'perf trace's cmd string table to decode sys_bpf() first
arg.
Vendor events:
- Add JSON events and metrics for Intel's Ice Lake, Tiger Lake and
Elhart Lake.
- Update JSON eventsand metrics for Intel's Cascade Lake and Sky Lake
servers.
Hardware tracing:
- Improvements for the ARM hardware tracing auxtrace support"
* tag 'perf-tools-for-v5.15-2021-09-04' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux: (130 commits)
perf tests: Add test for PMU aliases
perf pmu: Add PMU alias support
perf session: Report collisions in AUX records
perf script python: Allow reporting the [un]throttle PERF_RECORD_ meta event
perf build: Report failure for testing feature libopencsd
perf cs-etm: Show a warning for an unknown magic number
perf cs-etm: Print the decoder name
perf cs-etm: Create ETE decoder
perf cs-etm: Update OpenCSD decoder for ETE
perf cs-etm: Fix typo
perf cs-etm: Save TRCDEVARCH register
perf cs-etm: Refactor out ETMv4 header saving
perf cs-etm: Initialise architecture based on TRCIDR1
perf cs-etm: Refactor initialisation of decoder params.
tools build: Fix feature detect clean for out of source builds
perf evlist: Add evlist__for_each_entry_from() macro
perf evsel: Handle precise_ip fallback in evsel__open_cpu()
perf evsel: Move bpf_counter__install_pe() to success path in evsel__open_cpu()
perf evsel: Move test_attr__open() to success path in evsel__open_cpu()
perf evsel: Move ignore_missing_thread() to fallback code
...
- Simplifying the Kconfig use of FTRACE and TRACE_IRQFLAGS_SUPPORT
- bootconfig now can start histograms
- bootconfig supports group/all enabling
- histograms now can put values in linear size buckets
- execnames can be passed to synthetic events
- Introduction of "event probes" that attach to other events and
can retrieve data from pointers of fields, or record fields
as different types (a pointer to a string as a string instead
of just a hex number)
- Various fixes and clean ups
-----BEGIN PGP SIGNATURE-----
iIoEABYIADIWIQRRSw7ePDh/lE+zeZMp5XQQmuv6qgUCYTJDixQccm9zdGVkdEBn
b29kbWlzLm9yZwAKCRAp5XQQmuv6qnPLAP9XviWrZD27uFj6LU/Vp2umbq8la1aC
oW8o9itUGpLoHQD+OtsMpQXsWrxoNw/JD1OWCH4J0YN+TnZAUUG2E9e0twA=
=OZXG
-----END PGP SIGNATURE-----
Merge tag 'trace-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing updates from Steven Rostedt:
- simplify the Kconfig use of FTRACE and TRACE_IRQFLAGS_SUPPORT
- bootconfig can now start histograms
- bootconfig supports group/all enabling
- histograms now can put values in linear size buckets
- execnames can be passed to synthetic events
- introduce "event probes" that attach to other events and can retrieve
data from pointers of fields, or record fields as different types (a
pointer to a string as a string instead of just a hex number)
- various fixes and clean ups
* tag 'trace-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (35 commits)
tracing/doc: Fix table format in histogram code
selftests/ftrace: Add selftest for testing duplicate eprobes and kprobes
selftests/ftrace: Add selftest for testing eprobe events on synthetic events
selftests/ftrace: Add test case to test adding and removing of event probe
selftests/ftrace: Fix requirement check of README file
selftests/ftrace: Add clear_dynamic_events() to test cases
tracing: Add a probe that attaches to trace events
tracing/probes: Reject events which have the same name of existing one
tracing/probes: Have process_fetch_insn() take a void * instead of pt_regs
tracing/probe: Change traceprobe_set_print_fmt() to take a type
tracing/probes: Use struct_size() instead of defining custom macros
tracing/probes: Allow for dot delimiter as well as slash for system names
tracing/probe: Have traceprobe_parse_probe_arg() take a const arg
tracing: Have dynamic events have a ref counter
tracing: Add DYNAMIC flag for dynamic events
tracing: Replace deprecated CPU-hotplug functions.
MAINTAINERS: Add an entry for os noise/latency
tracepoint: Fix kerneldoc comments
bootconfig/tracing/ktest: Update ktest example for boot-time tracing
tools/bootconfig: Use per-group/all enable option in ftrace2bconf script
...
- MM rework
+ Implementing up to 4 paging levels.
+ Enable STRICT_MM_TYPECHECK
+ switch pgtable_t back to struct page *
- Atomics rework / implementing relaxed accessors
- Retiring of legacy MMUv1,v2; ARC750 cores
- A few other build errors, typos
-----BEGIN PGP SIGNATURE-----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=hIYy
-----END PGP SIGNATURE-----
Merge tag 'arc-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
Pull ARC updates from Vineet Gupta:
"Finally a big pile of changes for ARC (atomics/mm). These are from our
internal arc64 tree, preparing mainline for eventual arc64 support.
I'm spreading them out to avoid tsunami of patches in one release.
- MM rework:
- Implement up to 4 paging levels
- Enable STRICT_MM_TYPECHECK
- switch pgtable_t back to 'struct page *'
- Atomics rework / implement relaxed accessors
- Retire legacy MMUv1,v2; ARC750 cores
- A few other build errors, typos"
* tag 'arc-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: (33 commits)
ARC: mm: vmalloc sync from kernel to user table to update PMD ...
ARC: mm: support 4 levels of page tables
ARC: mm: support 3 levels of page tables
ARC: mm: switch to asm-generic/pgalloc.h
ARC: mm: switch pgtable_t back to struct page *
ARC: mm: hack to allow 2 level build with 4 level code
ARC: mm: disintegrate pgtable.h into levels and flags
ARC: mm: disintegrate mmu.h (arcv2 bits out)
ARC: mm: move MMU specific bits out of entry code ...
ARC: mm: move MMU specific bits out of ASID allocator
ARC: mm: non-functional code movement/cleanup
ARC: mm: pmd_populate* to use the canonical set_pmd (and drop pmd_set)
ARC: ioremap: use more commonly used PAGE_KERNEL based uncached flag
ARC: mm: Enable STRICT_MM_TYPECHECKS
ARC: mm: Fixes to allow STRICT_MM_TYPECHECKS
ARC: mm: move mmu/cache externs out to setup.h
ARC: mm: remove tlb paranoid code
ARC: mm: use SCRATCH_DATA0 register for caching pgdir in ARCv2 only
ARC: retire MMUv1 and MMUv2 support
ARC: retire ARC750 support
...
* Support for PC-relative instructions (auipc and branches) in kprobes.
* Support for forced IRQ threading.
* Support for the hlt/nohlt kernel command line options, via the generic
idle loop.
* Support for showing the edge/level triggered behavior of interrupts in
/proc/interrupts.
* A handful of cleanups to our address mapping mechanisms.
* Support for allocating gigantic hugepages via CMA.
* Support for the undefined behavior sanitizer.
* A handful of cleanups to the VDSO that allow the kernel to build with
LLD.
* Support for hugepage migration.
-----BEGIN PGP SIGNATURE-----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=rDB3
-----END PGP SIGNATURE-----
Merge tag 'riscv-for-linus-5.15-mw0' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V updates from Palmer Dabbelt:
- support PC-relative instructions (auipc and branches) in kprobes
- support for forced IRQ threading
- support for the hlt/nohlt kernel command line options, via the
generic idle loop
- show the edge/level triggered behavior of interrupts
in /proc/interrupts
- a handful of cleanups to our address mapping mechanisms
- support for allocating gigantic hugepages via CMA
- support for the undefined behavior sanitizer (UBSAN)
- a handful of cleanups to the VDSO that allow the kernel to build with
LLD.
- support for hugepage migration
* tag 'riscv-for-linus-5.15-mw0' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (21 commits)
riscv: add support for hugepage migration
RISC-V: Fix VDSO build for !MMU
riscv: use strscpy to replace strlcpy
riscv: explicitly use symbol offsets for VDSO
riscv: Enable Undefined Behavior Sanitizer UBSAN
riscv: Keep the riscv Kconfig selects sorted
riscv: Support allocating gigantic hugepages using CMA
riscv: fix the global name pfn_base confliction error
riscv: Move early fdt mapping creation in its own function
riscv: Simplify BUILTIN_DTB device tree mapping handling
riscv: Use __maybe_unused instead of #ifdefs around variable declarations
riscv: Get rid of map_size parameter to create_kernel_page_table
riscv: Introduce va_kernel_pa_offset for 32-bit kernel
riscv: Optimize kernel virtual address conversion macro
dt-bindings: riscv: add starfive jh7100 bindings
riscv: Enable GENERIC_IRQ_SHOW_LEVEL
riscv: Enable idle generic idle loop
riscv: Allow forced irq threading
riscv: Implement thread_struct whitelist for hardened usercopy
riscv: kprobes: implement the branch instructions
...
... but make it a config option so that broken environments can disable
it when required.
We really should always have a clean build, and will disable specific
over-eager warnings as required, if we can't fix them. But while I
fairly religiously enforce that in my own tree, it doesn't get enforced
by various build robots that don't necessarily report warnings.
So this just makes '-Werror' a default compiler flag, but allows people
to disable it for their configuration if they have some particular
issues.
Occasionally, new compiler versions end up enabling new warnings, and it
can take a while before we have them fixed (or the warnings disabled if
that is what it takes), so the config option allows for that situation.
Hopefully this will mean that I get fewer pull requests that have new
warnings that were not noticed by various automation we have in place.
Knock wood.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Here are some straggler USB-serial changes for 5.15-rc1.
These were not included in the first pull request as they came in "late"
from Johan and I had missed them in my pull request earlier this week.
Nothing big in here, just some USB to serial driver updates and fixes.
All of these were in linux-next before I pulled them into my tree, and
have been in linux-next all this week from my tree with no reported
problems.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCYTMQHA8cZ3JlZ0Brcm9h
aC5jb20ACgkQMUfUDdst+yn27ACeOFMj4BM0SnH69oxhXcbhIxpUEKIAoKugLy6O
8fm9N2JX//QBIMBPK3HJ
=Vz2y
-----END PGP SIGNATURE-----
Merge tag 'usb-5.15-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull more USB updates from Greg KH:
"Here are some straggler USB-serial changes for 5.15-rc1.
These were not included in the first pull request as they came in
"late" from Johan and I had missed them in my pull request earlier
this week.
Nothing big in here, just some USB to serial driver updates and fixes.
All of these were in linux-next before I pulled them into my tree, and
have been in linux-next all this week from my tree with no reported
problems"
* tag 'usb-5.15-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
USB: serial: pl2303: fix GL type detection
USB: serial: replace symbolic permissions by octal permissions
USB: serial: cp210x: determine fw version for CP2105 and CP2108
USB: serial: cp210x: clean up type detection
USB: serial: cp210x: clean up set-chars request
USB: serial: cp210x: clean up control-request timeout
USB: serial: cp210x: fix flow-control error handling
USB: serial: cp210x: fix control-characters error handling
USB: serial: io_edgeport: drop unused descriptor helper
* blkdevs:
- Simplify the refcounting in blktrans_{open, release}
- Simplify blktrans_getgeo
- Remove blktrans_ref_mutex
- Simplify blktrans_dev_get
- Use lockdep_assert_held
- Don't hold del_mtd_blktrans_dev in blktrans_{open, release}
* ftl:
- Don't cast away the type when calling add_mtd_blktrans_dev
- Don't cast away the type when calling add_mtd_blktrans_dev
- Use container_of() rather than cast
- Fix use-after-free
- Add discard support
- Allow use of MTD_RAM for testing purposes
* concat:
- Check _read, _write callbacks existence before assignment
- Judge callback existence based on the master
* maps:
- Maps: remove dead MTD map driver for PMC-Sierra MSP boards
* mtdblock:
- Warn if added for a NAND device
- Add comment about UBI block devices
- Update old JFFS2 mention in Kconfig
* partitions:
- Redboot: convert to YAML
NAND core changes:
* Repair Miquel Raynal's email address in MAINTAINERS
* Fix a couple of spelling mistakes in Kconfig
* bbt: Skip bad blocks when searching for the BBT in NAND
* Remove never changed ret variable
Raw NAND changes:
* cafe: Fix a resource leak in the error handling path of 'cafe_nand_probe()'
* intel: Fix error handling in probe
* omap: Fix kernel doc warning on 'calcuate' typo
* gpmc: Fix the ECC bytes vs. OOB bytes equation
SPI-NAND core changes:
* Properly fill the OOB area.
* Fix comment
SPI-NAND drivers changes:
* macronix: Add Quad support for serial NAND flash
-----BEGIN PGP SIGNATURE-----
iQEzBAABCgAdFiEE9HuaYnbmDhq/XIDIJWrqGEe9VoQFAmExS1gACgkQJWrqGEe9
VoSZcAf/SsUDpp/lqc+no4R+eUR/CWrbr3AKu2JjjgCJt0HK++Fy8LQU3FEjn9E8
CNBWYqIVVit1XhqGu192wh0ESsHGlNwjicB3Ul4/RFFC4WKs68kQe0gQrU6z/95V
jaTOW+B7PZh6MFbQROUVI97Cs3OTd8vCE3L2SgIW6krk8tnOEyddlgFsWLISjk6g
Ut1I473653fJAcr5OXEFJLWF+01q2azR9AiAkfKC47IUekTRJqjK2YJpAhsdf4hi
xqazp79sbcNXSHCgOOQv4/f03+SAiufRcNgztwrSWw2fdCg0csBC9ACwmdhhGGfd
7uFn+/Q3sVDOKTN7aAWW1KnykKXsJw==
=JFrk
-----END PGP SIGNATURE-----
Merge tag 'mtd/for-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux
Pull MTD updates from Miquel Raynal:
"MTD changes:
- blkdevs:
- Simplify the refcounting in blktrans_{open, release}
- Simplify blktrans_getgeo
- Remove blktrans_ref_mutex
- Simplify blktrans_dev_get
- Use lockdep_assert_held
- Don't hold del_mtd_blktrans_dev in blktrans_{open, release}
- ftl:
- Don't cast away the type when calling add_mtd_blktrans_dev
- Don't cast away the type when calling add_mtd_blktrans_dev
- Use container_of() rather than cast
- Fix use-after-free
- Add discard support
- Allow use of MTD_RAM for testing purposes
- concat:
- Check _read, _write callbacks existence before assignment
- Judge callback existence based on the master
- maps:
- Maps: remove dead MTD map driver for PMC-Sierra MSP boards
- mtdblock:
- Warn if added for a NAND device
- Add comment about UBI block devices
- Update old JFFS2 mention in Kconfig
- partitions:
- Redboot: convert to YAML
NAND core changes:
- Repair Miquel Raynal's email address in MAINTAINERS
- Fix a couple of spelling mistakes in Kconfig
- bbt: Skip bad blocks when searching for the BBT in NAND
- Remove never changed ret variable
Raw NAND changes:
- cafe: Fix a resource leak in the error handling path of 'cafe_nand_probe()'
- intel: Fix error handling in probe
- omap: Fix kernel doc warning on 'calcuate' typo
- gpmc: Fix the ECC bytes vs. OOB bytes equation
SPI-NAND core changes:
- Properly fill the OOB area.
- Fix comment
SPI-NAND drivers changes:
- macronix: Add Quad support for serial NAND flash"
* tag 'mtd/for-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux: (30 commits)
mtd: rawnand: cafe: Fix a resource leak in the error handling path of 'cafe_nand_probe()'
mtd_blkdevs: simplify the refcounting in blktrans_{open, release}
mtd_blkdevs: simplify blktrans_getgeo
mtd_blkdevs: remove blktrans_ref_mutex
mtd_blkdevs: simplify blktrans_dev_get
mtd/rfd_ftl: don't cast away the type when calling add_mtd_blktrans_dev
mtd/ftl: don't cast away the type when calling add_mtd_blktrans_dev
mtd_blkdevs: use lockdep_assert_held
mtd_blkdevs: don't hold del_mtd_blktrans_dev in blktrans_{open, release}
mtd: rawnand: intel: Fix error handling in probe
mtd: mtdconcat: Check _read, _write callbacks existence before assignment
mtd: mtdconcat: Judge callback existence based on the master
mtd: maps: remove dead MTD map driver for PMC-Sierra MSP boards
mtd: rfd_ftl: use container_of() rather than cast
mtd: rfd_ftl: fix use-after-free
mtd: rfd_ftl: add discard support
mtd: rfd_ftl: allow use of MTD_RAM for testing purposes
mtdblock: Warn if added for a NAND device
mtd: spinand: macronix: Add Quad support for serial NAND flash
mtdblock: Add comment about UBI block devices
...
fs/binfmt_aout.c: In function ‘load_aout_library’:
fs/binfmt_aout.c:311:27: error: expected ‘)’ before ‘;’ token
311 | MAP_FIXED | MAP_PRIVATE;
| ^
fs/binfmt_aout.c:309:10: error: too few arguments to function ‘vm_mmap’
309 | error = vm_mmap(file, start_addr, ex.a_text + ex.a_data,
| ^~~~~~~
In file included from fs/binfmt_aout.c:12:
include/linux/mm.h:2626:35: note: declared here
2626 | extern unsigned long __must_check vm_mmap(struct file *, unsigned long,
| ^~~~~~~
Fix this by reverting the accidental replacement of a comma by a
semicolon.
Fixes: 42be8b4253 ("binfmt: don't use MAP_DENYWRITE when loading shared libraries via uselib()")
Reported-by: noreply@ellerman.id.au
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull MAP_DENYWRITE removal from David Hildenbrand:
"Remove all in-tree usage of MAP_DENYWRITE from the kernel and remove
VM_DENYWRITE.
There are some (minor) user-visible changes:
- We no longer deny write access to shared libaries loaded via legacy
uselib(); this behavior matches modern user space e.g. dlopen().
- We no longer deny write access to the elf interpreter after exec
completed, treating it just like shared libraries (which it often
is).
- We always deny write access to the file linked via /proc/pid/exe:
sys_prctl(PR_SET_MM_MAP/EXE_FILE) will fail if write access to the
file cannot be denied, and write access to the file will remain
denied until the link is effectivel gone (exec, termination,
sys_prctl(PR_SET_MM_MAP/EXE_FILE)) -- just as if exec'ing the file.
Cross-compiled for a bunch of architectures (alpha, microblaze, i386,
s390x, ...) and verified via ltp that especially the relevant tests
(i.e., creat07 and execve04) continue working as expected"
* tag 'denywrite-for-5.15' of git://github.com/davidhildenbrand/linux:
fs: update documentation of get_write_access() and friends
mm: ignore MAP_DENYWRITE in ksys_mmap_pgoff()
mm: remove VM_DENYWRITE
binfmt: remove in-tree usage of MAP_DENYWRITE
kernel/fork: always deny write access to current MM exe_file
kernel/fork: factor out replacing the current MM exe_file
binfmt: don't use MAP_DENYWRITE when loading shared libraries via uselib()
Merge NTFSv3 filesystem from Konstantin Komarov:
"This patch adds NTFS Read-Write driver to fs/ntfs3.
Having decades of expertise in commercial file systems development and
huge test coverage, we at Paragon Software GmbH want to make our
contribution to the Open Source Community by providing implementation
of NTFS Read-Write driver for the Linux Kernel.
This is fully functional NTFS Read-Write driver. Current version works
with NTFS (including v3.1) and normal/compressed/sparse files and
supports journal replaying.
We plan to support this version after the codebase once merged, and
add new features and fix bugs. For example, full journaling support
over JBD will be added in later updates"
Link: https://lore.kernel.org/lkml/20210729134943.778917-1-almaz.alexandrovich@paragon-software.com/
Link: https://lore.kernel.org/lkml/aa4aa155-b9b2-9099-b7a2-349d8d9d8fbd@paragon-software.com/
* git://github.com/Paragon-Software-Group/linux-ntfs3: (35 commits)
fs/ntfs3: Change how module init/info messages are displayed
fs/ntfs3: Remove GPL boilerplates from decompress lib files
fs/ntfs3: Remove unnecessary condition checking from ntfs_file_read_iter
fs/ntfs3: Fix integer overflow in ni_fiemap with fiemap_prep()
fs/ntfs3: Restyle comments to better align with kernel-doc
fs/ntfs3: Rework file operations
fs/ntfs3: Remove fat ioctl's from ntfs3 driver for now
fs/ntfs3: Restyle comments to better align with kernel-doc
fs/ntfs3: Fix error handling in indx_insert_into_root()
fs/ntfs3: Potential NULL dereference in hdr_find_split()
fs/ntfs3: Fix error code in indx_add_allocate()
fs/ntfs3: fix an error code in ntfs_get_acl_ex()
fs/ntfs3: add checks for allocation failure
fs/ntfs3: Use kcalloc/kmalloc_array over kzalloc/kmalloc
fs/ntfs3: Do not use driver own alloc wrappers
fs/ntfs3: Use kernel ALIGN macros over driver specific
fs/ntfs3: Restyle comment block in ni_parse_reparse()
fs/ntfs3: Remove unused including <linux/version.h>
fs/ntfs3: Fix fall-through warnings for Clang
fs/ntfs3: Fix one none utf8 char in source file
...
In this cycle, we've addressed some performance issues such as lock contention,
misbehaving compress_cache, allowing extent_cache for compressed files, and new
sysfs to adjust ra_size for fadvise. In order to diagnose the performance issues
quickly, we also added an iostat which shows the IO latencies periodically. On
the stability side, we've found two memory leakage cases in the error path in
compression flow. And, we've also fixed various corner cases in fiemap, quota,
checkpoint=disable, zstd, and so on.
Enhancement:
- avoid long checkpoint latency by releasing nat_tree_lock
- collect and show iostats periodically
- support extent_cache for compressed files
- add a sysfs entry to manage ra_size given fadvise(POSIX_FADV_SEQUENTIAL)
- report f2fs GC status via sysfs
- add discard_unit=%s in mount option to handle zoned device
Bug fix:
- fix two memory leakages when an error happens in the compressed IO flow
- fix commpress_cache to get the right LBA
- fix fiemap to deal with compressed case correctly
- fix wrong EIO returns due to SBI_NEED_FSCK
- fix missing writes when enabling checkpoint back
- fix quota deadlock
- fix zstd level mount option
In addition to the above major updates, we've cleaned up several code paths such
as dio, unnecessary operations, debugfs/f2fs/status, sanity check, and typos.
-----BEGIN PGP SIGNATURE-----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=W67o
-----END PGP SIGNATURE-----
Merge tag 'f2fs-for-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs
Pull f2fs updates from Jaegeuk Kim:
"In this cycle, we've addressed some performance issues such as lock
contention, misbehaving compress_cache, allowing extent_cache for
compressed files, and new sysfs to adjust ra_size for fadvise.
In order to diagnose the performance issues quickly, we also added an
iostat which shows the IO latencies periodically.
On the stability side, we've found two memory leakage cases in the
error path in compression flow. And, we've also fixed various corner
cases in fiemap, quota, checkpoint=disable, zstd, and so on.
Enhancements:
- avoid long checkpoint latency by releasing nat_tree_lock
- collect and show iostats periodically
- support extent_cache for compressed files
- add a sysfs entry to manage ra_size given fadvise(POSIX_FADV_SEQUENTIAL)
- report f2fs GC status via sysfs
- add discard_unit=%s in mount option to handle zoned device
Bug fixes:
- fix two memory leakages when an error happens in the compressed IO flow
- fix commpress_cache to get the right LBA
- fix fiemap to deal with compressed case correctly
- fix wrong EIO returns due to SBI_NEED_FSCK
- fix missing writes when enabling checkpoint back
- fix quota deadlock
- fix zstd level mount option
In addition to the above major updates, we've cleaned up several code
paths such as dio, unnecessary operations, debugfs/f2fs/status, sanity
check, and typos"
* tag 'f2fs-for-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (46 commits)
f2fs: should put a page beyond EOF when preparing a write
f2fs: deallocate compressed pages when error happens
f2fs: enable realtime discard iff device supports discard
f2fs: guarantee to write dirty data when enabling checkpoint back
f2fs: fix to unmap pages from userspace process in punch_hole()
f2fs: fix unexpected ENOENT comes from f2fs_map_blocks()
f2fs: fix to account missing .skipped_gc_rwsem
f2fs: adjust unlock order for cleanup
f2fs: Don't create discard thread when device doesn't support realtime discard
f2fs: rebuild nat_bits during umount
f2fs: introduce periodic iostat io latency traces
f2fs: separate out iostat feature
f2fs: compress: do sanity check on cluster
f2fs: fix description about main_blkaddr node
f2fs: convert S_IRUGO to 0444
f2fs: fix to keep compatibility of fault injection interface
f2fs: support fault injection for f2fs_kmem_cache_alloc()
f2fs: compress: allow write compress released file after truncate to zero
f2fs: correct comment in segment.h
f2fs: improve sbi status info in debugfs/f2fs/status
...
Update maintainership for the uniform CD-ROM driver from Jens Axboe to
Phillip Potter in MAINTAINERS file, to reflect the attempt to pass on
maintainership of this driver to a different individual. Also remove
URL to site which is no longer active.
Suggested-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://lore.kernel.org/r/20210904174030.1103-1-phil@philpotter.co.uk
Signed-off-by: Jens Axboe <axboe@kernel.dk>
- New Features:
- Better client responsiveness when server isn't replying
- Use refcount_t in sunrpc rpc_client refcount tracking
- Add srcaddr and dst_port to the sunrpc sysfs info files
- Add basic support for connection sharing between servers with multiple NICs`
- Bugfixes and Cleanups:
- Sunrpc tracepoint cleanups
- Disconnect after ib_post_send() errors to avoid deadlocks
- Fix for tearing down rpcrdma_reps
- Fix a potential pNFS layoutget livelock loop
- pNFS layout barrier fixes
- Fix a potential memory corruption in rpc_wake_up_queued_task_set_status()
- Fix reconnection locking
- Fix return value of get_srcport()
- Remove rpcrdma_post_sends()
- Remove pNFS dead code
- Remove copy size restriction for inter-server copies
- Overhaul the NFS callback service
- Clean up sunrpc TCP socket shutdowns
- Always provide aligned buffers to RPC read layers
-----BEGIN PGP SIGNATURE-----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=Ad/3
-----END PGP SIGNATURE-----
Merge tag 'nfs-for-5.15-1' of git://git.linux-nfs.org/projects/anna/linux-nfs
Pull NFS client updates from Anna Schumaker:
"New Features:
- Better client responsiveness when server isn't replying
- Use refcount_t in sunrpc rpc_client refcount tracking
- Add srcaddr and dst_port to the sunrpc sysfs info files
- Add basic support for connection sharing between servers with multiple NICs`
Bugfixes and Cleanups:
- Sunrpc tracepoint cleanups
- Disconnect after ib_post_send() errors to avoid deadlocks
- Fix for tearing down rpcrdma_reps
- Fix a potential pNFS layoutget livelock loop
- pNFS layout barrier fixes
- Fix a potential memory corruption in rpc_wake_up_queued_task_set_status()
- Fix reconnection locking
- Fix return value of get_srcport()
- Remove rpcrdma_post_sends()
- Remove pNFS dead code
- Remove copy size restriction for inter-server copies
- Overhaul the NFS callback service
- Clean up sunrpc TCP socket shutdowns
- Always provide aligned buffers to RPC read layers"
* tag 'nfs-for-5.15-1' of git://git.linux-nfs.org/projects/anna/linux-nfs: (39 commits)
NFS: Always provide aligned buffers to the RPC read layers
NFSv4.1 add network transport when session trunking is detected
SUNRPC enforce creation of no more than max_connect xprts
NFSv4 introduce max_connect mount options
SUNRPC add xps_nunique_destaddr_xprts to xprt_switch_info in sysfs
SUNRPC keep track of number of transports to unique addresses
NFSv3: Delete duplicate judgement in nfs3_async_handle_jukebox
SUNRPC: Tweak TCP socket shutdown in the RPC client
SUNRPC: Simplify socket shutdown when not reusing TCP ports
NFSv4.2: remove restriction of copy size for inter-server copy.
NFS: Clean up the synopsis of callback process_op()
NFS: Extract the xdr_init_encode/decode() calls from decode_compound
NFS: Remove unused callback void decoder
NFS: Add a private local dispatcher for NFSv4 callback operations
SUNRPC: Eliminate the RQ_AUTHERR flag
SUNRPC: Set rq_auth_stat in the pg_authenticate() callout
SUNRPC: Add svc_rqst::rq_auth_stat
SUNRPC: Add dst_port to the sysfs xprt info file
SUNRPC: Add srcaddr as a file in sysfs
sunrpc: Fix return value of get_srcport()
...
syzbot is reporting circular locking problem at __loop_clr_fd() [1], for
commit a160c6159d ("block: add an optional probe callback to
major_names") is calling the module's probe function with major_names_lock
held.
Fortunately, since commit 990e78116d ("block: loop: fix deadlock
between open and remove") stopped holding loop_ctl_mutex in lo_open(),
current role of loop_ctl_mutex is to serialize access to loop_index_idr
and loop_add()/loop_remove(); in other words, management of id for IDR.
To avoid holding loop_ctl_mutex during whole add/remove operation, use
a bool flag to indicate whether the loop device is ready for use.
loop_unregister_transfer() which is called from cleanup_cryptoloop()
currently has possibility of use-after-free problem due to lack of
serialization between kfree() from loop_remove() from loop_control_remove()
and mutex_lock() from unregister_transfer_cb(). But since lo->lo_encryption
should be already NULL when this function is called due to module unload,
and commit 222013f9ac ("cryptoloop: add a deprecation warning")
indicates that we will remove this function shortly, this patch updates
this function to emit warning instead of checking lo->lo_encryption.
Holding loop_ctl_mutex in loop_exit() is pointless, for all users must
close /dev/loop-control and /dev/loop$num (in order to drop module's
refcount to 0) before loop_exit() starts, and nobody can open
/dev/loop-control or /dev/loop$num afterwards.
Link: https://syzkaller.appspot.com/bug?id=7bb10e8b62f83e4d445cdf4c13d69e407e629558 [1]
Reported-by: syzbot <syzbot+f61766d5763f9e7a118f@syzkaller.appspotmail.com>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/adb1e792-fc0e-ee81-7ea0-0906fc36419d@i-love.sakura.ne.jp
Signed-off-by: Jens Axboe <axboe@kernel.dk>
It currently takes a long, and while that's normally OK, the io_uring
limit is an int. Internally in io_uring it's an int, but sometimes it's
passed as a long. That can yield confusing results where a completions
seems to generate a huge result:
ou-sqp-1297-1298 [001] ...1 788.056371: io_uring_complete: ring 000000000e98e046, user_data 0x0, result 4294967171, cflags 0
which is due to -ECANCELED being stored in an unsigned, and then passed
in as a long. Using the right int type, the trace looks correct:
iou-sqp-338-339 [002] ...1 15.633098: io_uring_complete: ring 00000000e0ac60cf, user_data 0x0, result -125, cflags 0
Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This Kselftest update for Linux 5.15-rc1 consists of fixes to build
and test failures.
-- openat2 test failure for O_LARGEFILE flag on ARM64
-- x86 test build failures related to glibc 2.34 adding
support for variable sized MINSIGSTKSZ and SIGSTKSZ
-- removing obsolete configs in sync and cpufreq config files
-- minor spelling and duplicate header include cleanups
-----BEGIN PGP SIGNATURE-----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=Z7Bj
-----END PGP SIGNATURE-----
Merge tag 'linux-kselftest-next-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull Kselftest updates from Shuah Khan:
"Fixes to build and test failures:
- openat2 test failure for O_LARGEFILE flag on ARM64
- x86 test build failures related to glibc 2.34 adding support for
variable sized MINSIGSTKSZ and SIGSTKSZ
- removing obsolete configs in sync and cpufreq config files
- minor spelling and duplicate header include cleanups"
* tag 'linux-kselftest-next-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
selftests/cpufreq: Rename DEBUG_PI_LIST to DEBUG_PLIST
selftests/sync: Remove the deprecated config SYNC
selftests: safesetid: Fix spelling mistake "cant" -> "can't"
selftests/x86: Fix error: variably modified 'altstack_data' at file scope
kselftest:sched: remove duplicate include in cs_prctl_test.c
selftests: openat2: Fix testing failure for O_LARGEFILE flag
- Add -s option (strict mode) to merge_config.sh to make it fail when
any symbol is redefined.
- Show a warning if a different compiler is used for building external
modules.
- Infer --target from ARCH for CC=clang to let you cross-compile the
kernel without CROSS_COMPILE.
- Make the integrated assembler default (LLVM_IAS=1) for CC=clang.
- Add <linux/stdarg.h> to the kernel source instead of borrowing
<stdarg.h> from the compiler.
- Add Nick Desaulniers as a Kbuild reviewer.
- Drop stale cc-option tests.
- Fix the combination of CONFIG_TRIM_UNUSED_KSYMS and CONFIG_LTO_CLANG
to handle symbols in inline assembly.
- Show a warning if 'FORCE' is missing for if_changed rules.
- Various cleanups
-----BEGIN PGP SIGNATURE-----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=lw3M
-----END PGP SIGNATURE-----
Merge tag 'kbuild-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild updates from Masahiro Yamada:
- Add -s option (strict mode) to merge_config.sh to make it fail when
any symbol is redefined.
- Show a warning if a different compiler is used for building external
modules.
- Infer --target from ARCH for CC=clang to let you cross-compile the
kernel without CROSS_COMPILE.
- Make the integrated assembler default (LLVM_IAS=1) for CC=clang.
- Add <linux/stdarg.h> to the kernel source instead of borrowing
<stdarg.h> from the compiler.
- Add Nick Desaulniers as a Kbuild reviewer.
- Drop stale cc-option tests.
- Fix the combination of CONFIG_TRIM_UNUSED_KSYMS and CONFIG_LTO_CLANG
to handle symbols in inline assembly.
- Show a warning if 'FORCE' is missing for if_changed rules.
- Various cleanups
* tag 'kbuild-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (39 commits)
kbuild: redo fake deps at include/ksym/*.h
kbuild: clean up objtool_args slightly
modpost: get the *.mod file path more simply
checkkconfigsymbols.py: Fix the '--ignore' option
kbuild: merge vmlinux_link() between ARCH=um and other architectures
kbuild: do not remove 'linux' link in scripts/link-vmlinux.sh
kbuild: merge vmlinux_link() between the ordinary link and Clang LTO
kbuild: remove stale *.symversions
kbuild: remove unused quiet_cmd_update_lto_symversions
gen_compile_commands: extract compiler command from a series of commands
x86: remove cc-option-yn test for -mtune=
arc: replace cc-option-yn uses with cc-option
s390: replace cc-option-yn uses with cc-option
ia64: move core-y in arch/ia64/Makefile to arch/ia64/Kbuild
sparc: move the install rule to arch/sparc/Makefile
security: remove unneeded subdir-$(CONFIG_...)
kbuild: sh: remove unused install script
kbuild: Fix 'no symbols' warning when CONFIG_TRIM_UNUSD_KSYMS=y
kbuild: Switch to 'f' variants of integrated assembler flag
kbuild: Shuffle blank line to improve comment meaning
...
Pull ibft fix from Konrad Rzeszutek Wilk:
"An arm64 compile fix for the new code that fixed the iBFT KASLR
handling. I missed the original 0-day build email report"
* 'stable/for-linus-5.15-rc0' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/ibft:
iscsi_ibft: Fix isa_bus_to_virt not working under ARM
- Convert pseries & powernv to use MSI IRQ domains.
- Rework the pseries CPU numbering so that CPUs that are removed, and later re-added, are
given a CPU number on the same node as previously, when possible.
- Add support for a new more flexible device-tree format for specifying NUMA distances.
- Convert powerpc to GENERIC_PTDUMP.
- Retire sbc8548 and sbc8641d board support.
- Various other small features and fixes.
Thanks to: Alexey Kardashevskiy, Aneesh Kumar K.V, Anton Blanchard, Cédric Le Goater,
Christophe Leroy, Emmanuel Gil Peyrot, Fabiano Rosas, Fangrui Song, Finn Thain, Gautham R.
Shenoy, Hari Bathini, Joel Stanley, Jordan Niethe, Kajol Jain, Laurent Dufour, Leonardo
Bras, Lukas Bulwahn, Marc Zyngier, Masahiro Yamada, Michal Suchanek, Nathan Chancellor,
Nicholas Piggin, Parth Shah, Paul Gortmaker, Pratik R. Sampat, Randy Dunlap, Sebastian
Andrzej Siewior, Srikar Dronamraju, Wan Jiabing, Xiongwei Song, Zheng Yongjun.
-----BEGIN PGP SIGNATURE-----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=EbN0
-----END PGP SIGNATURE-----
Merge tag 'powerpc-5.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc updates from Michael Ellerman:
- Convert pseries & powernv to use MSI IRQ domains.
- Rework the pseries CPU numbering so that CPUs that are removed, and
later re-added, are given a CPU number on the same node as
previously, when possible.
- Add support for a new more flexible device-tree format for specifying
NUMA distances.
- Convert powerpc to GENERIC_PTDUMP.
- Retire sbc8548 and sbc8641d board support.
- Various other small features and fixes.
Thanks to Alexey Kardashevskiy, Aneesh Kumar K.V, Anton Blanchard,
Cédric Le Goater, Christophe Leroy, Emmanuel Gil Peyrot, Fabiano Rosas,
Fangrui Song, Finn Thain, Gautham R. Shenoy, Hari Bathini, Joel
Stanley, Jordan Niethe, Kajol Jain, Laurent Dufour, Leonardo Bras, Lukas
Bulwahn, Marc Zyngier, Masahiro Yamada, Michal Suchanek, Nathan
Chancellor, Nicholas Piggin, Parth Shah, Paul Gortmaker, Pratik R.
Sampat, Randy Dunlap, Sebastian Andrzej Siewior, Srikar Dronamraju, Wan
Jiabing, Xiongwei Song, and Zheng Yongjun.
* tag 'powerpc-5.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (154 commits)
powerpc/bug: Cast to unsigned long before passing to inline asm
powerpc/ptdump: Fix generic ptdump for 64-bit
KVM: PPC: Fix clearing never mapped TCEs in realmode
powerpc/pseries/iommu: Rename "direct window" to "dma window"
powerpc/pseries/iommu: Make use of DDW for indirect mapping
powerpc/pseries/iommu: Find existing DDW with given property name
powerpc/pseries/iommu: Update remove_dma_window() to accept property name
powerpc/pseries/iommu: Reorganize iommu_table_setparms*() with new helper
powerpc/pseries/iommu: Add ddw_property_create() and refactor enable_ddw()
powerpc/pseries/iommu: Allow DDW windows starting at 0x00
powerpc/pseries/iommu: Add ddw_list_new_entry() helper
powerpc/pseries/iommu: Add iommu_pseries_alloc_table() helper
powerpc/kernel/iommu: Add new iommu_table_in_use() helper
powerpc/pseries/iommu: Replace hard-coded page shift
powerpc/numa: Update cpu_cpu_map on CPU online/offline
powerpc/numa: Print debug statements only when required
powerpc/numa: convert printk to pr_xxx
powerpc/numa: Drop dbg in favour of pr_debug
powerpc/smp: Enable CACHE domain for shared processor
powerpc/smp: Update cpu_core_map on all PowerPc systems
...
Fix an unaligned-access crash in the bootloader and drop asm/swab.h.
-----BEGIN PGP SIGNATURE-----
iHUEABYIAB0WIQS86RI+GtKfB8BJu973ErUQojoPXwUCYTHYXgAKCRD3ErUQojoP
X1afAQCytCoygzHd6EyP6imoXsllx9hjzNHsii84zevhfQkBmQD9HARGlx23iYa+
oXBuOL+pPKcauLVMFTIVKTvLtlrjbw4=
=KH1L
-----END PGP SIGNATURE-----
Merge tag 'for-5.15/parisc-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parisc architecture fixes from Helge Deller:
"Fix an unaligned-access crash in the bootloader and drop asm/swab.h"
* tag 'for-5.15/parisc-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: Fix unaligned-access crash in bootloader
parisc: Drop __arch_swab16(), arch_swab24(), _arch_swab32() and __arch_swab64() functions
- fixes and cleanups
-----BEGIN PGP SIGNATURE-----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=mKyO
-----END PGP SIGNATURE-----
Merge tag 'mips_5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux
Pull MIPS updates from Thomas Bogendoerfer:
- converted Pistachio platform to use MIPS generic kernel
- fixes and cleanups
* tag 'mips_5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: (29 commits)
MIPS: Malta: fix alignment of the devicetree buffer
MIPS: ingenic: Unconditionally enable clock of CPU #0
MIPS: mscc: ocelot: mark the phy-mode for internal PHY ports
MIPS: mscc: ocelot: disable all switch ports by default
MAINTAINERS: adjust PISTACHIO SOC SUPPORT after its retirement
MIPS: Return true/false (not 1/0) from bool functions
MIPS: generic: Return true/false (not 1/0) from bool functions
MIPS: Make a alias for pistachio_defconfig
MIPS: Retire MACH_PISTACHIO
MIPS: config: generic: Add config for Marduk board
pinctrl: pistachio: Make it as an option
phy: pistachio-usb: Depend on MIPS || COMPILE_TEST
clocksource/drivers/pistachio: Make it selectable for MIPS
clk: pistachio: Make it selectable for generic MIPS kernel
MIPS: DTS: Pistachio add missing cpc and cdmm
MIPS: generic: Allow generating FIT image for Marduk board
MIPS: locking/atomic: Fix atomic{_64,}_sub_if_positive
MIPS: loongson2ef: don't build serial.o unconditionally
MIPS: Replace deprecated CPU-hotplug functions.
MIPS: Alchemy: Fix spelling contraction "cant" -> "can't"
...
A few cleanups and compiler warning fixes for OpenRISC. Also, this
includes dts and defconfig updates to enable Ethernet on OpenRISC/Litex
FPGA SoC's now that the LiteEth driver has gone upstream.
-----BEGIN PGP SIGNATURE-----
iQIzBAABCAAdFiEE2cRzVK74bBA6Je/xw7McLV5mJ+QFAmExPQ0ACgkQw7McLV5m
J+Qj0Q//bW0kYR8b4TAYm9d1NY0LaUrx6eE0mOIYj5vLMUx4l3vVOiTwsi4UdcCO
7Pw1x/EyRwZV1pW7jw6w4C+TZS9nniMQeNeJKddFMhdMFotfL2AWvaIaC9VHvKL5
vusrT3LhF3z73R4QBmDUAE9QghUJlVXyBzGRNKKpuK3kX/1m0X3GLyRWCAjuBhia
/yqeM8XUFDMUNEdu3Aoc9JckFc62Ri6BYPVk4ePqfTRSW8oTPXgIw2l39aw4sJPM
fS6BAJvAUIcoXjGK5utzg02Iz5Nf+gT4jYJ/2ZS5MWmbCxy20RK9lFTD/wbHh6F0
34/xIRjDNWAfbC+w6smnZedheJHe3ca0/ss+JhQ4PRyTQGx4looiYayy5cYUcwqy
uYTg/+rPJ7JIJBXYS28gFiOBlSGpdGpGUClD4WQc2zuFtmoYN7VNGHnwXuktSuVz
U3h/g0GmGtiB/8SU/1Hh2F1Ga1U3g4C2ITcP5HUK1RPTzFxGYY/VlzutehUTmWmg
qnWSE95Ci8PoBVzX44KPvh5HfL3TMtwp3r0zKTysDCfBg0dIH7LHHiadXlDpAMdB
wdMrReUEetgQZnX8IJZUyWo0AzU/AUOHtjx3P8NW61ObGHCGd9yMQivUVijwtJxV
a74yxdJh31vEbYbgPpURs88IByXteS/X7M1IqYcocOlpHjQMNIA=
=md7e
-----END PGP SIGNATURE-----
Merge tag 'for-linus' of git://github.com/openrisc/linux
Pull OpenRISC updates from Stafford Horne:
"A few cleanups and compiler warning fixes for OpenRISC.
Also, this includes dts and defconfig updates to enable Ethernet on
OpenRISC/Litex FPGA SoC's now that the LiteEth driver has gone
upstream"
* tag 'for-linus' of git://github.com/openrisc/linux:
openrisc/litex: Update defconfig
openrisc/litex: Add ethernet device
openrisc/litex: Update uart address
openrisc: Fix compiler warnings in setup
openrisc: rename or32 code & comments to or1k
openrisc: don't printk() unconditionally
Including:
- New DART IOMMU driver for Apple Silicon M1 chips.
- Optimizations for iommu_[map/unmap] performance
- Selective TLB flush support for the AMD IOMMU driver to make
it more efficient on emulated IOMMUs.
- Rework IOVA setup and default domain type setting to move more
code out of IOMMU drivers and to support runtime switching
between certain types of default domains.
- VT-d Updates from Lu Baolu:
- Update the virtual command related registers
- Enable Intel IOMMU scalable mode by default
- Preset A/D bits for user space DMA usage
- Allow devices to have more than 32 outstanding PRs
- Various cleanups
- ARM SMMU Updates from Will Deacon:
- SMMUv3: Minor optimisation to avoid zeroing struct members on CMD submission
- SMMUv3: Increased use of batched commands to reduce submission latency
- SMMUv3: Refactoring in preparation for ECMDQ support
- SMMUv2: Fix races when probing devices with identical StreamIDs
- SMMUv2: Optimise walk cache flushing for Qualcomm implementations
- SMMUv2: Allow deep sleep states for some Qualcomm SoCs with shared clocks
- Various smaller optimizations, cleanups, and fixes
-----BEGIN PGP SIGNATURE-----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=zVaQ
-----END PGP SIGNATURE-----
Merge tag 'iommu-updates-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull iommu updates from Joerg Roedel:
- New DART IOMMU driver for Apple Silicon M1 chips
- Optimizations for iommu_[map/unmap] performance
- Selective TLB flush support for the AMD IOMMU driver to make it more
efficient on emulated IOMMUs
- Rework IOVA setup and default domain type setting to move more code
out of IOMMU drivers and to support runtime switching between certain
types of default domains
- VT-d Updates from Lu Baolu:
- Update the virtual command related registers
- Enable Intel IOMMU scalable mode by default
- Preset A/D bits for user space DMA usage
- Allow devices to have more than 32 outstanding PRs
- Various cleanups
- ARM SMMU Updates from Will Deacon:
SMMUv3:
- Minor optimisation to avoid zeroing struct members on CMD submission
- Increased use of batched commands to reduce submission latency
- Refactoring in preparation for ECMDQ support
SMMUv2:
- Fix races when probing devices with identical StreamIDs
- Optimise walk cache flushing for Qualcomm implementations
- Allow deep sleep states for some Qualcomm SoCs with shared clocks
- Various smaller optimizations, cleanups, and fixes
* tag 'iommu-updates-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (85 commits)
iommu/io-pgtable: Abstract iommu_iotlb_gather access
iommu/arm-smmu: Fix missing unlock on error in arm_smmu_device_group()
iommu/vt-d: Add present bit check in pasid entry setup helpers
iommu/vt-d: Use pasid_pte_is_present() helper function
iommu/vt-d: Drop the kernel doc annotation
iommu/vt-d: Allow devices to have more than 32 outstanding PRs
iommu/vt-d: Preset A/D bits for user space DMA usage
iommu/vt-d: Enable Intel IOMMU scalable mode by default
iommu/vt-d: Refactor Kconfig a bit
iommu/vt-d: Remove unnecessary oom message
iommu/vt-d: Update the virtual command related registers
iommu: Allow enabling non-strict mode dynamically
iommu: Merge strictness and domain type configs
iommu: Only log strictness for DMA domains
iommu: Expose DMA domain strictness via sysfs
iommu: Express DMA strictness via the domain type
iommu/vt-d: Prepare for multiple DMA domain types
iommu/arm-smmu: Prepare for multiple DMA domain types
iommu/amd: Prepare for multiple DMA domain types
iommu: Introduce explicit type for non-strict DMA domains
...
Pull swiotlb updates from Konrad Rzeszutek Wilk:
"A new feature called restricted DMA pools. It allows SWIOTLB to
utilize per-device (or per-platform) allocated memory pools instead of
using the global one.
The first big user of this is ARM Confidential Computing where the
memory for DMA operations can be set per platform"
* 'stable/for-linus-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb: (23 commits)
swiotlb: use depends on for DMA_RESTRICTED_POOL
of: restricted dma: Don't fail device probe on rmem init failure
of: Move of_dma_set_restricted_buffer() into device.c
powerpc/svm: Don't issue ultracalls if !mem_encrypt_active()
s390/pv: fix the forcing of the swiotlb
swiotlb: Free tbl memory in swiotlb_exit()
swiotlb: Emit diagnostic in swiotlb_exit()
swiotlb: Convert io_default_tlb_mem to static allocation
of: Return success from of_dma_set_restricted_buffer() when !OF_ADDRESS
swiotlb: add overflow checks to swiotlb_bounce
swiotlb: fix implicit debugfs declarations
of: Add plumbing for restricted DMA pool
dt-bindings: of: Add restricted DMA pool
swiotlb: Add restricted DMA pool initialization
swiotlb: Add restricted DMA alloc/free support
swiotlb: Refactor swiotlb_tbl_unmap_single
swiotlb: Move alloc_size to swiotlb_find_slots
swiotlb: Use is_swiotlb_force_bounce for swiotlb data bouncing
swiotlb: Update is_swiotlb_active to add a struct device argument
swiotlb: Update is_swiotlb_buffer to add a struct device argument
...
Merge misc updates from Andrew Morton:
"173 patches.
Subsystems affected by this series: ia64, ocfs2, block, and mm (debug,
pagecache, gup, swap, shmem, memcg, selftests, pagemap, mremap,
bootmem, sparsemem, vmalloc, kasan, pagealloc, memory-failure,
hugetlb, userfaultfd, vmscan, compaction, mempolicy, memblock,
oom-kill, migration, ksm, percpu, vmstat, and madvise)"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (173 commits)
mm/madvise: add MADV_WILLNEED to process_madvise()
mm/vmstat: remove unneeded return value
mm/vmstat: simplify the array size calculation
mm/vmstat: correct some wrong comments
mm/percpu,c: remove obsolete comments of pcpu_chunk_populated()
selftests: vm: add COW time test for KSM pages
selftests: vm: add KSM merging time test
mm: KSM: fix data type
selftests: vm: add KSM merging across nodes test
selftests: vm: add KSM zero page merging test
selftests: vm: add KSM unmerge test
selftests: vm: add KSM merge test
mm/migrate: correct kernel-doc notation
mm: wire up syscall process_mrelease
mm: introduce process_mrelease system call
memblock: make memblock_find_in_range method private
mm/mempolicy.c: use in_task() in mempolicy_slab_node()
mm/mempolicy: unify the create() func for bind/interleave/prefer-many policies
mm/mempolicy: advertise new MPOL_PREFERRED_MANY
mm/hugetlb: add support for mempolicy MPOL_PREFERRED_MANY
...
There is a usecase in Android that an app process's memory is swapped out
by process_madvise() with MADV_PAGEOUT, such as the memory is swapped to
zram or a backing device. When the process is scheduled to running, like
switch to foreground, multiple page faults may cause the app dropped
frames.
To reduce the problem, System Management Software can read-ahead memory
of the process immediately when the app switches to forground. Calling
process_madvise() with MADV_WILLNEED can meet this need.
Link: https://lkml.kernel.org/r/20210804082010.12482-1-zhangkui@oppo.com
Signed-off-by: zhangkui <zhangkui@oppo.com>
Cc: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The return value of pagetypeinfo_showfree and pagetypeinfo_showblockcount
are unused now. Remove them.
Link: https://lkml.kernel.org/r/20210715122911.15700-4-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
We can replace the array_num * sizeof(array[0]) with sizeof(array) to
simplify the code.
Link: https://lkml.kernel.org/r/20210715122911.15700-3-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Patch series "Cleanup for vmstat".
This series contains cleanups to remove unneeded return value, correct
wrong comment and simplify the array size calculation. More details can
be found in the respective changelogs.
This patch (of 3):
Correct wrong fls(mem+1) to fls(mem)+1 and remove the duplicated comment
with quiet_vmstat().
Link: https://lkml.kernel.org/r/20210715122911.15700-1-linmiaohe@huawei.com
Link: https://lkml.kernel.org/r/20210715122911.15700-2-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Commit b239f7daf5 ("percpu: set PCPU_BITMAP_BLOCK_SIZE to PAGE_SIZE")
removed the parameter 'for_alloc', so remove this comment.
Link: https://lkml.kernel.org/r/1630576043-21367-1-git-send-email-jingxiangfeng@huawei.com
Signed-off-by: Jing Xiangfeng <jingxiangfeng@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Since merged pages are copied every time they need to be modified, the
write access time is different between shared and non-shared pages. Add
ksm_cow_time() function which evaluates latency of these COW breaks.
First, 4000 pages are allocated and the time, required to modify 1 byte in
every other page, is measured. After this, the pages are merged into 2000
pairs and in each pair, 1 page is modified (i.e. they are decoupled) to
detect COW breaks. The time needed to break COW of merged pages is then
compared with performance of non-shared pages.
The test is run as follows: ./ksm_tests -C
The output:
Total size: 15 MiB
Not merged pages:
Total time: 0.002185489 s
Average speed: 3202.945 MiB/s
Merged pages:
Total time: 0.004386872 s
Average speed: 1595.670 MiB/s
Link: https://lkml.kernel.org/r/1d03ee0d1b341959d4b61672c6401d498bff5652.1629386192.git.zhansayabagdaulet@gmail.com
Signed-off-by: Zhansaya Bagdauletkyzy <zhansayabagdaulet@gmail.com>
Reviewed-by: Tyler Hicks <tyhicks@linux.microsoft.com>
Reviewed-by: Pavel Tatashin <pasha.tatashin@soleen.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Patch series "add KSM performance tests", v3.
Extend KSM self tests with a performance benchmark. These tests are not
part of regular regression testing, as they are mainly intended to be used
by developers making changes to the memory management subsystem.
This patch (of 2):
Add ksm_merge_time() function to determine speed and time needed for
merging. The total spent time is shown in seconds while speed is in
MiB/s. User must specify the size of duplicated memory area (in MiB)
before running the test.
The test is run as follows: ./ksm_tests -P -s 100
The output:
Total size: 100 MiB
Total time: 0.201106786 s
Average speed: 497.248 MiB/s
Link: https://lkml.kernel.org/r/cover.1629386192.git.zhansayabagdaulet@gmail.com
Link: https://lkml.kernel.org/r/318b946ac80cc9205c89d0962048378f7ce0705b.1629386192.git.zhansayabagdaulet@gmail.com
Signed-off-by: Zhansaya Bagdauletkyzy <zhansayabagdaulet@gmail.com>
Reviewed-by: Tyler Hicks <tyhicks@linux.microsoft.com>
Reviewed-by: Pavel Tatashin <pasha.tatashin@soleen.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
ksm_stable_node_chains_prune_millisecs is declared as int, but in
stable__node_chains_prune_millisecs_store(), it can store values up to
UINT_MAX. Change its type to unsigned int.
Link: https://lkml.kernel.org/r/20210806111351.GA71845@asus
Signed-off-by: Zhansaya Bagdauletkyzy <zhansayabagdaulet@gmail.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Add check_ksm_numa_merge() function to test that pages in different NUMA
nodes are being handled properly. First, two duplicate pages are
allocated in two separate NUMA nodes using the libnuma library. Since
there is one unique page in each node, with merge_across_nodes = 0, there
won't be any shared pages. If merge_across_nodes is set to 1, the pages
will be treated as usual duplicate pages and will be merged. If NUMA
config is not enabled or the number of NUMA nodes is less than two, then
the test is skipped. The test is run as follows: ./ksm_tests -N
Link: https://lkml.kernel.org/r/071c17b5b04ebb0dfeba137acc495e5dd9d2a719.1626252248.git.zhansayabagdaulet@gmail.com
Signed-off-by: Zhansaya Bagdauletkyzy <zhansayabagdaulet@gmail.com>
Reviewed-by: Pavel Tatashin <pasha.tatashin@soleen.com>
Reviewed-by: Tyler Hicks <tyhicks@linux.microsoft.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Add check_ksm_zero_page_merge() function to test that empty pages are
being handled properly. For this, several zero pages are allocated and
merged using madvise. If use_zero_pages is enabled, the pages must be
shared with the special kernel zero pages; otherwise, they are merged as
usual duplicate pages. The test is run as follows: ./ksm_tests -Z
Link: https://lkml.kernel.org/r/6d0caab00d4bdccf5e3791cb95cf6dfd5eb85e45.1626252248.git.zhansayabagdaulet@gmail.com
Signed-off-by: Zhansaya Bagdauletkyzy <zhansayabagdaulet@gmail.com>
Reviewed-by: Pavel Tatashin <pasha.tatashin@soleen.com>
Reviewed-by: Tyler Hicks <tyhicks@linux.microsoft.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Add check_ksm_unmerge() function to verify that KSM is properly unmerging
shared pages. For this, two duplicate pages are merged first and then
their contents are modified. Since they are not identical anymore, the
pages must be unmerged and the number of merged pages has to be 0. The
test is run as follows: ./ksm_tests -U
Link: https://lkml.kernel.org/r/c0f55420440d704d5b094275b4365aa1b2ad46b5.1626252248.git.zhansayabagdaulet@gmail.com
Signed-off-by: Zhansaya Bagdauletkyzy <zhansayabagdaulet@gmail.com>
Reviewed-by: Pavel Tatashin <pasha.tatashin@soleen.com>
Reviewed-by: Tyler Hicks <tyhicks@linux.microsoft.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Patch series "add KSM selftests".
Introduce selftests to validate the functionality of KSM. The tests are
run on private anonymous pages. Since some KSM tunables are modified,
their starting values are saved and restored after testing. At the start,
run is set to 2 to ensure that only test pages will be merged (we assume
that no applications make madvise syscalls in the background). If KSM
config not enabled, all tests will be skipped.
This patch (of 4):
Add check_ksm_merge() function to check the basic merging feature of KSM.
First, some number of identical pages are allocated and the MADV_MERGEABLE
advice is given to merge these pages. Then, pages_shared and
pages_sharing values are compared with the expected numbers using
assert_ksm_pages_count() function. The number of pages can be changed
using -p option.
Link: https://lkml.kernel.org/r/cover.1626252248.git.zhansayabagdaulet@gmail.com
Link: https://lkml.kernel.org/r/90287685c13300972ea84de93d1f3f900373f9fe.1626252248.git.zhansayabagdaulet@gmail.com
Signed-off-by: Zhansaya Bagdauletkyzy <zhansayabagdaulet@gmail.com>
Reviewed-by: Pavel Tatashin <pasha.tatashin@soleen.com>
Reviewed-by: Tyler Hicks <tyhicks@linux.microsoft.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Use the expected "Return:" format to prevent a kernel-doc warning.
mm/migrate.c:1157: warning: Excess function parameter 'returns' description in 'next_demotion_node'
Link: https://lkml.kernel.org/r/20210808203151.10632-1-rdunlap@infradead.org
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Split off from prev patch in the series that implements the syscall.
Link: https://lkml.kernel.org/r/20210809185259.405936-2-surenb@google.com
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Christian Brauner <christian.brauner@ubuntu.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Florian Weimer <fweimer@redhat.com>
Cc: Jan Engelhardt <jengelh@inai.de>
Cc: Jann Horn <jannh@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Rik van Riel <riel@surriel.com>
Cc: Roman Gushchin <guro@fb.com>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Tim Murray <timmurray@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
In modern systems it's not unusual to have a system component monitoring
memory conditions of the system and tasked with keeping system memory
pressure under control. One way to accomplish that is to kill
non-essential processes to free up memory for more important ones.
Examples of this are Facebook's OOM killer daemon called oomd and
Android's low memory killer daemon called lmkd.
For such system component it's important to be able to free memory quickly
and efficiently. Unfortunately the time process takes to free up its
memory after receiving a SIGKILL might vary based on the state of the
process (uninterruptible sleep), size and OPP level of the core the
process is running. A mechanism to free resources of the target process
in a more predictable way would improve system's ability to control its
memory pressure.
Introduce process_mrelease system call that releases memory of a dying
process from the context of the caller. This way the memory is freed in a
more controllable way with CPU affinity and priority of the caller. The
workload of freeing the memory will also be charged to the caller. The
operation is allowed only on a dying process.
After previous discussions [1, 2, 3] the decision was made [4] to
introduce a dedicated system call to cover this use case.
The API is as follows,
int process_mrelease(int pidfd, unsigned int flags);
DESCRIPTION
The process_mrelease() system call is used to free the memory of
an exiting process.
The pidfd selects the process referred to by the PID file
descriptor.
(See pidfd_open(2) for further information)
The flags argument is reserved for future use; currently, this
argument must be specified as 0.
RETURN VALUE
On success, process_mrelease() returns 0. On error, -1 is
returned and errno is set to indicate the error.
ERRORS
EBADF pidfd is not a valid PID file descriptor.
EAGAIN Failed to release part of the address space.
EINTR The call was interrupted by a signal; see signal(7).
EINVAL flags is not 0.
EINVAL The memory of the task cannot be released because the
process is not exiting, the address space is shared
with another live process or there is a core dump in
progress.
ENOSYS This system call is not supported, for example, without
MMU support built into Linux.
ESRCH The target process does not exist (i.e., it has terminated
and been waited on).
[1] https://lore.kernel.org/lkml/20190411014353.113252-3-surenb@google.com/
[2] https://lore.kernel.org/linux-api/20201113173448.1863419-1-surenb@google.com/
[3] https://lore.kernel.org/linux-api/20201124053943.1684874-3-surenb@google.com/
[4] https://lore.kernel.org/linux-api/20201223075712.GA4719@lst.de/
Link: https://lkml.kernel.org/r/20210809185259.405936-1-surenb@google.com
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Acked-by: David Hildenbrand <david@redhat.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Roman Gushchin <guro@fb.com>
Cc: Rik van Riel <riel@surriel.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Jann Horn <jannh@google.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Christian Brauner <christian.brauner@ubuntu.com>
Cc: Florian Weimer <fweimer@redhat.com>
Cc: Jan Engelhardt <jengelh@inai.de>
Cc: Tim Murray <timmurray@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Stephen Brennan
Linus Torvalds
Stephen Rothwell
Geert Uytterhoeven
Phillip Potter
Tetsuo Handa
Jens Axboe
zhangkui
Miaohe Lin
Jing Xiangfeng
Zhansaya Bagdauletkyzy
Randy Dunlap
Suren Baghdasaryan