Developers manage to overwrite states blindly without thought. That's fatal
and hard to debug. Add sanity checks to make it fail.
This requries to restructure the code so that the dynamic state allocation
happens in the same lock protected section as the actual store. Otherwise
the previous assignment of 'Reserved' to the name field would trigger the
overwrite check.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Link: http://lkml.kernel.org/r/20161221192111.675234535@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
The error cleanup which is invoked when the hotplug state setup failed
tries to remove the failed state, which is broken.
Fixes: 8fba38c937 ("x86/msr: Convert to hotplug state machine")
Reported-by: kernel test robot <fengguang.wu@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
In case the driver registration fails, the hotplug callback is leaked.
Not fatal, because it's never invoked as there are no instances registered,
but wrong nevertheless.
Fixes: fdc15a36d8 ("bus/arm-ccn: Convert to hotplug statemachine")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will.deacon@arm.com>
If the pmu registration fails the registered hotplug callbacks are not
removed. Wrong in any case, but fatal in case of a modular driver.
Replace the nonsensical state names with proper ones while at it.
Fixes: 77c34ef1c3 ("perf/x86/intel/cstate: Convert Intel CSTATE to hotplug state machine")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: stable@vger.kernel.org
The cpu hotplug support of this perf driver is broken in several ways:
1) It adds a instance before setting up the state.
2) The state for the instance is different from the state of the
callback. It's just a randomly chosen state.
3) The instance registration is not error checked so nobody noticed that
the call can never succeed.
4) The state for the multi install callbacks is chosen randomly and
overwrites existing state. This is now prevented by the core code so the
call is guaranteed to fail.
5) The error exit path in the init function leaves the instance registered
and then frees the memory which contains the enqueued hlist node.
6) The remove function is removing the state and not the instance.
Fix it by:
- Setting up the state before adding instances. Use a dynamically allocated
state for it.
- Installing instances after the state has been set up
- Removing the instance in the error path before freeing memory
- Removing the instance not the state in the driver remove callback
While at is use raw_cpu_processor_id(), because cpu_processor_id() cannot
be used in preemptible context, and set the driver data after successful
registration of the pmu.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Shawn Guo <shawnguo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Cc: Frank Li <frank.li@nxp.com>
Cc: Zhengyu Shen <zhengyu.shen@nxp.com>
Link: http://lkml.kernel.org/r/20161221192111.596204211@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
The CPU hotplug code is a trainwreck. It leaks a notifier in case of driver
registration error and the per cpu loop is racy against cpu hotplug. Aside
of that the driver should have been written and merged with the new state
machine interfaces in the first place.
Mop up the mess and Convert it to the hotplug state machine.
Signed-off-by: Thomas Grumpy Gleixner <tglx@linutronix.de>
Cc: Nilesh Javali <nilesh.javali@cavium.com>
Cc: Adheer Chandravanshi <adheer.chandravanshi@qlogic.com>
Cc: Chad Dupuis <chad.dupuis@cavium.com>
Cc: Saurav Kashyap <saurav.kashyap@cavium.com>
Cc: Arun Easi <arun.easi@cavium.com>
Cc: Manish Rangankar <manish.rangankar@cavium.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
The new --add option has replaced the -M, -m, -C, -c options
Eg.
-M 0x10 is now --add msr0x10,raw
-m 0x10 is now --add msr0x10,raw,u32
-C 0x10 is now --add msr0x10,delta
-c 0x10 is now --add msr0x10,delta,u32
The --add option can be repeated to add any number of counters,
while the previous options were limited to adding one of each type.
In addition, the --add option can accept a column label,
and can also display a counter as a percentage of elapsed cycles.
Eg. --add msr0x3fe,core,percent,MY_CC3
Signed-off-by: Len Brown <len.brown@intel.com>
Create the "--add" parameter. This can be used to teach an existing
turbostat binary about any number of any type of counter.
turbostat(8) details the syntax for --add.
Signed-off-by: Len Brown <len.brown@intel.com>
This was entirely automated, using the script by Al:
PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*<asm/uaccess.h>'
sed -i -e "s!$PATT!#include <linux/uaccess.h>!" \
$(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h)
to do the replacement at the end of the merge window.
Requested-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull cifs fixes from Steve French:
"This ncludes various cifs/smb3 bug fixes, mostly for stable as well.
In the next week I expect that Germano will have some reconnection
fixes, and also I expect to have the remaining pieces of the snapshot
enablement and SMB3 ACLs, but wanted to get this set of bug fixes in"
* 'for-next' of git://git.samba.org/sfrench/cifs-2.6:
cifs_get_root shouldn't use path with tree name
Fix default behaviour for empty domains and add domainauto option
cifs: use %16phN for formatting md5 sum
cifs: Fix smbencrypt() to stop pointing a scatterlist at the stack
CIFS: Fix a possible double locking of mutex during reconnect
CIFS: Fix a possible memory corruption during reconnect
CIFS: Fix a possible memory corruption in push locks
CIFS: Fix missing nls unload in smb2_reconnect()
CIFS: Decrease verbosity of ioctl call
SMB3: parsing for new snapshot timestamp mount parm
New driver for Add Loongson1 SoC.
Minor cleanup and fixes in various drivers.
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Merge tag 'watchdog-for-linus-v4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
Pull watchdog updates from Wim Van Sebroeck and Guenter Roeck:
- new driver for Add Loongson1 SoC
- minor cleanup and fixes in various drivers
* tag 'watchdog-for-linus-v4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
watchdog: it87_wdt: add IT8620E ID
watchdog: mpc8xxx: Remove unneeded linux/miscdevice.h include
watchdog: octeon: Remove unneeded linux/miscdevice.h include
watchdog: bcm2835_wdt: set WDOG_HW_RUNNING bit when appropriate
watchdog: loongson1: Add Loongson1 SoC watchdog driver
watchdog: cpwd: remove memory allocate failure message
watchdog: da9062/61: watchdog driver
intel-mid_wdt: Error code is just an integer
intel-mid_wdt: make sure watchdog is not running at startup
watchdog: mei_wdt: request stop on reboot to prevent false positive event
watchdog: hpwdt: changed maintainer information
watchdog: jz4740: Fix modular build
watchdog: qcom: fix kernel panic due to external abort on non-linefetch
watchdog: davinci: add support for deferred probing
watchdog: meson: Remove unneeded platform MODULE_ALIAS
watchdog: Standardize leading tabs and spaces in Kconfig file
watchdog: max77620_wdt: fix module autoload
watchdog: bcm7038_wdt: fix module autoload
and correcting a free_irq inconsistency. It adds Intel SKX support.
Finally, it changes the AMD NTB maintainer, and fixes some bugs present
there.
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Merge tag 'ntb-4.10' of git://github.com/jonmason/ntb
Pull NTB update from Jon Mason:
- NTB bug fixes for removing an unnecessary call to ntb_peer_spad_read,
and correcting a free_irq inconsistency
- add Intel SKX support
- change the AMD NTB maintainer, and fix some bugs present there
* tag 'ntb-4.10' of git://github.com/jonmason/ntb:
ntb_transport: Remove unnecessary call to ntb_peer_spad_read
NTB: Fix 'request_irq()' and 'free_irq()' inconsistancy
ntb: fix SKX NTB config space size register offsets
NTB: correct ntb_peer_spad_read for case when callback is not supplied.
MAINTAINERS: Change in maintainer for AMD NTB
ntb_transport: Limit memory windows based on available, scratchpads
NTB: Register and offset values fix for memory window
NTB: add support for hotplug feature
ntb: Adding Skylake Xeon NTB support
Pull x86 fixes from Ingo Molnar:
"There's a number of fixes:
- a round of fixes for CPUID-less legacy CPUs
- a number of microcode loader fixes
- i8042 detection robustization fixes
- stack dump/unwinder fixes
- x86 SoC platform driver fixes
- a GCC 7 warning fix
- virtualization related fixes"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (24 commits)
Revert "x86/unwind: Detect bad stack return address"
x86/paravirt: Mark unused patch_default label
x86/microcode/AMD: Reload proper initrd start address
x86/platform/intel/quark: Add printf attribute to imr_self_test_result()
x86/platform/intel-mid: Switch MPU3050 driver to IIO
x86/alternatives: Do not use sync_core() to serialize I$
x86/topology: Document cpu_llc_id
x86/hyperv: Handle unknown NMIs on one CPU when unknown_nmi_panic
x86/asm: Rewrite sync_core() to use IRET-to-self
x86/microcode/intel: Replace sync_core() with native_cpuid()
Revert "x86/boot: Fail the boot if !M486 and CPUID is missing"
x86/asm/32: Make sync_core() handle missing CPUID on all 32-bit kernels
x86/cpu: Probe CPUID leaf 6 even when cpuid_level == 6
x86/tools: Fix gcc-7 warning in relocs.c
x86/unwind: Dump stack data on warnings
x86/unwind: Adjust last frame check for aligned function stacks
x86/init: Fix a couple of comment typos
x86/init: Remove i8042_detect() from platform ops
Input: i8042 - Trust firmware a bit more when probing on X86
x86/init: Add i8042 state to the platform data
...
Pull perf fixes from Ingo Molnar:
"On the kernel side there's two x86 PMU driver fixes and a uprobes fix,
plus on the tooling side there's a number of fixes and some late
updates"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (36 commits)
perf sched timehist: Fix invalid period calculation
perf sched timehist: Remove hardcoded 'comm_width' check at print_summary
perf sched timehist: Enlarge default 'comm_width'
perf sched timehist: Honour 'comm_width' when aligning the headers
perf/x86: Fix overlap counter scheduling bug
perf/x86/pebs: Fix handling of PEBS buffer overflows
samples/bpf: Move open_raw_sock to separate header
samples/bpf: Remove perf_event_open() declaration
samples/bpf: Be consistent with bpf_load_program bpf_insn parameter
tools lib bpf: Add bpf_prog_{attach,detach}
samples/bpf: Switch over to libbpf
perf diff: Do not overwrite valid build id
perf annotate: Don't throw error for zero length symbols
perf bench futex: Fix lock-pi help string
perf trace: Check if MAP_32BIT is defined (again)
samples/bpf: Make perf_event_read() static
uprobes: Fix uprobes on MIPS, allow for a cache flush after ixol breakpoint creation
samples/bpf: Make samples more libbpf-centric
tools lib bpf: Add flags to bpf_create_map()
tools lib bpf: use __u32 from linux/types.h
...
Pull irq fix from Ingo Molnar:
"A build warning fix with certain .config's"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip/st: Mark st_irq_syscfg_resume() __maybe_unused
The user prio field is wrong (and overflows) in the XDP forward
flow.
This is a result of a bad value for num_tx_rings_p_up, which should
account all XDP TX rings, as they operate for the same user prio.
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Reported-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
In commit 6f00089c73 ("tipc: remove SS_DISCONNECTING state") the
check for socket type is in the wrong place, causing a closing socket
to always send out a FIN message even when the socket was never
connected. This is normally harmless, since the destination node for
such messages most often is zero, and the message will be dropped, but
it is still a wrong and confusing behavior.
We fix this in this commit.
Reviewed-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
In an IPvlan setup when master is set in loopback mode e.g.
ethtool -K eth0 set loopback on
where eth0 is master device for IPvlan setup.
The failure is caused by the faulty logic that determines if the
packet is from TX-path vs. RX-path by just looking at the mac-
addresses on the packet while processing multicast packets.
In the loopback-mode where this crash was happening, the packets
that are sent out are reflected by the NIC and are processed on
the RX path, but mac-address check tricks into thinking this
packet is from TX path and falsely uses dev_forward_skb() to pass
packets to the slave (virtual) devices.
This patch records the path while queueing packets and eliminates
logic of looking at mac-addresses for the same decision.
------------[ cut here ]------------
kernel BUG at include/linux/skbuff.h:1737!
Call Trace:
[<ffffffff921fbbc2>] dev_forward_skb+0x92/0xd0
[<ffffffffc031ac65>] ipvlan_process_multicast+0x395/0x4c0 [ipvlan]
[<ffffffffc031a9a7>] ? ipvlan_process_multicast+0xd7/0x4c0 [ipvlan]
[<ffffffff91cdfea7>] ? process_one_work+0x147/0x660
[<ffffffff91cdff09>] process_one_work+0x1a9/0x660
[<ffffffff91cdfea7>] ? process_one_work+0x147/0x660
[<ffffffff91ce086d>] worker_thread+0x11d/0x360
[<ffffffff91ce0750>] ? rescuer_thread+0x350/0x350
[<ffffffff91ce960b>] kthread+0xdb/0xe0
[<ffffffff91c05c70>] ? _raw_spin_unlock_irq+0x30/0x50
[<ffffffff91ce9530>] ? flush_kthread_worker+0xc0/0xc0
[<ffffffff92348b7a>] ret_from_fork+0x9a/0xd0
[<ffffffff91ce9530>] ? flush_kthread_worker+0xc0/0xc0
Fixes: ba35f8588f ("ipvlan: Defer multicast / broadcast processing to a work-queue")
Signed-off-by: Mahesh Bandewar <maheshb@google.com>
CC: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1) netif_rx() / dev_forward_skb() should not be called from process
context.
2) ipvlan_count_rx() should be called with preemption disabled.
3) We should check if ipvlan->dev is up before feeding packets
to netif_rx()
4) We need to prevent device from disappearing if some packets
are in the multicast backlog.
5) One kfree_skb() should be a consume_skb() eventually
Fixes: ba35f8588f ("ipvlan: Defer multicast / broadcast processing to
a work-queue")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Mahesh Bandewar <maheshb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The results were previously ignored, anyway.
Signed-off-by: Steve Wahl <Steve.Wahl@dell.com>
Fixes: e26a5843f7
Acked-by: Allen Hubbe <Allen.Hubbe@dell.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
'request_irq()' and 'free_irq()' should have the same 'dev_id'.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
The offsets for the SZ registers are wrong. Updated.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Reported-by: Sandeep Mann <sandeep@purestorage.com>
Tested-by: Zachary Ross <zacharyx.ross@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Correct ntb_peer_spad_read for case when callback is not supplied
Signed-off-by: Steve Wahl <Steve.Wahl@dell.com>
Acked-by: Allen Hubbe <Allen.Hubbe@dell.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
I would like to take maintainership for AMD NTB
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Signed-off-by: Xiangliang Yu <Xiangliang.Yu@amd.com>
Acked-by: Xiangliang Yu <Xiangliang.Yu@amd.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
When the underlying NTB H/W driver advertises more memory windows
than the number of scratchpads available to setup MW's, it is likely
that we may end up filling the remaining memory windows with garbage.
So to avoid that, lets limit the memory windows that transport driver
can setup based on the available scratchpads.
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Acked-by: Allen Hubbe <Allen.Hubbe@dell.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Due to incorrect limit and translation register values, NTB link was
going down when the memory window was setup. Made appropriate changes
as per spec.
Fix limit register values for BAR1, which was overlapping
with the BAR23 address.
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Acked-by: Allen Hubbe <Allen.Hubbe@dell.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
AMD NTB support hotplug under B2B mode. NTB will trigger link
up/down interrupt event when doing plug add/remove, this patch
implements the two interrupt event to support B2B hotplug function.
Signed-off-by: Xiangliang Yu <Xiangliang.Yu@amd.com>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Acked-by: Allen Hubbe <Allen.Hubbe@dell.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
The Skylake Xeon NTB hardware has made some changes to the register name,
offset, and the way doorbells work. Adding driver support for the new
hardware.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Acked-by: Allen Hubbe <Allen.Hubbe@dell.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Revert the following commit:
b6959a3621 ("x86/unwind: Detect bad stack return address")
... because Andrey Konovalov reported an unwinder warning:
WARNING: unrecognized kernel stack return address ffffffffa0000001 at ffff88006377fa18 in a.out:4467
The unwind was initiated from an interrupt which occurred while running in the
generated code for a kprobe. The unwinder printed the warning because it
expected regs->ip to point to a valid text address, but instead it pointed to
the generated code.
Eventually we may want come up with a way to identify generated kprobe
code so the unwinder can know that it's a valid return address. Until
then, just remove the warning.
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/02f296848fbf49fb72dfeea706413ecbd9d4caf6.1482418739.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Fixes for 'perf sched timehist': (Namhyung Kim)
- Define a larger initial alignment value for the COMM column and
make it be more consistently honoured, for instance in the header.
- Fix invalid period calculation when using the --time option to
select a time slice, when events outside that slice were being
considered for the per cpu idle stats summary.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-urgent-for-mingo-20161222' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent
Pull perf/urgent fixes from Arnaldo Carvalho de Melo:
Fixes for 'perf sched timehist': (Namhyung Kim)
- Define a larger initial alignment value for the COMM column and
make it be more consistently honoured, for instance in the header.
- Fix invalid period calculation when using the --time option to
select a time slice, when events outside that slice were being
considered for the per cpu idle stats summary.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Pull networking fixes from David Miller:
1) We have to be careful to not try and place a checksum after the end
of a rawv6 packet, fix from Dave Jones with help from Hannes
Frederic Sowa.
2) Missing memory barriers in tcp_tasklet_func() lead to crashes, from
Eric Dumazet.
3) Several bug fixes for the new XDP support in virtio_net, from Jason
Wang.
4) Increase headroom in RX skbs in be2net driver to accomodate
encapsulations such as geneve. From Kalesh A P.
5) Fix SKB frag unmapping on TX in mvpp2, from Thomas Petazzoni.
6) Pre-pulling UDP headers created a regression in RECVORIGDSTADDR
socket option support, from Willem de Bruijn.
7) UID based routing added a potential OOPS in ip_do_redirect() when we
see an SKB without a socket attached. We just need it for the
network namespace which we can get from skb->dev instead. Fix from
Lorenzo Colitti.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (30 commits)
sctp: fix recovering from 0 win with small data chunks
sctp: do not loose window information if in rwnd_over
virtio-net: XDP support for small buffers
virtio-net: remove big packet XDP codes
virtio-net: forbid XDP when VIRTIO_NET_F_GUEST_UFO is support
virtio-net: make rx buf size estimation works for XDP
virtio-net: unbreak csumed packets for XDP_PASS
virtio-net: correctly handle XDP_PASS for linearized packets
virtio-net: fix page miscount during XDP linearizing
virtio-net: correctly xmit linearized page on XDP_TX
virtio-net: remove the warning before XDP linearizing
mlxsw: spectrum_router: Correctly remove nexthop groups
mlxsw: spectrum_router: Don't reflect dead neighs
neigh: Send netevent after marking neigh as dead
ipv6: handle -EFAULT from skb_copy_bits
inet: fix IP(V6)_RECVORIGDSTADDR for udp sockets
net/sched: cls_flower: Mandate mask when matching on flags
net/sched: act_tunnel_key: Fix setting UDP dst port in metadata under IPv6
stmmac: CSR clock configuration fix
net: ipv4: Don't crash if passing a null sk to ip_do_redirect.
...
It's possible that we receive a packet that is larger than current
window. If it's the first packet in this way, it will cause it to
increase rwnd_over. Then, if we receive another data chunk (specially as
SCTP allows you to have one data chunk in flight even during 0 window),
rwnd_over will be overwritten instead of added to.
In the long run, this could cause the window to grow bigger than its
initial size, as rwnd_over would be charged only for the last received
data chunk while the code will try open the window for all packets that
were received and had its value in rwnd_over overwritten. This, then,
can lead to the worsening of payload/buffer ratio and cause rwnd_press
to kick in more often.
The fix is to sum it too, same as is done for rwnd_press, so that if we
receive 3 chunks after closing the window, we still have to release that
same amount before re-opening it.
Log snippet from sctp_test exhibiting the issue:
[ 146.209232] sctp: sctp_assoc_rwnd_decrease: asoc:ffff88013928e000
rwnd decreased by 1 to (0, 1, 114221)
[ 146.209232] sctp: sctp_assoc_rwnd_decrease:
association:ffff88013928e000 has asoc->rwnd:0, asoc->rwnd_over:1!
[ 146.209232] sctp: sctp_assoc_rwnd_decrease: asoc:ffff88013928e000
rwnd decreased by 1 to (0, 1, 114221)
[ 146.209232] sctp: sctp_assoc_rwnd_decrease:
association:ffff88013928e000 has asoc->rwnd:0, asoc->rwnd_over:1!
[ 146.209232] sctp: sctp_assoc_rwnd_decrease: asoc:ffff88013928e000
rwnd decreased by 1 to (0, 1, 114221)
[ 146.209232] sctp: sctp_assoc_rwnd_decrease:
association:ffff88013928e000 has asoc->rwnd:0, asoc->rwnd_over:1!
[ 146.209232] sctp: sctp_assoc_rwnd_decrease: asoc:ffff88013928e000
rwnd decreased by 1 to (0, 1, 114221)
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pull final vfs updates from Al Viro:
"Assorted cleanups and fixes all over the place"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
sg_write()/bsg_write() is not fit to be called under KERNEL_DS
ufs: fix function declaration for ufs_truncate_blocks
fs: exec: apply CLOEXEC before changing dumpable task flags
seq_file: reset iterator to first record for zero offset
vfs: fix isize/pos/len checks for reflink & dedupe
[iov_iter] fix iterate_all_kinds() on empty iterators
move aio compat to fs/aio.c
reorganize do_make_slave()
clone_private_mount() doesn't need to touch namespace_sem
remove a bogus claim about namespace_sem being held by callers of mnt_alloc_id()
Jason Wang says:
====================
several fixups for virtio-net XDP
Merry Xmas and a Happy New year to all:
This series tries to fixes several issues for virtio-net XDP which
could be categorized into several parts:
- fix several issues during XDP linearizing
- allow csumed packet to work for XDP_PASS
- make EWMA rxbuf size estimation works for XDP
- forbid XDP when GUEST_UFO is support
- remove big packet XDP support
- add XDP support or small buffer
Please see individual patches for details.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit f600b69050 ("virtio_net: Add XDP support") leaves the case of
small receive buffer untouched. This will confuse the user who want to
set XDP but use small buffers. Other than forbid XDP in small buffer
mode, let's make it work. XDP then can only work at skb->data since
virtio-net create skbs during refill, this is sub optimal which could
be optimized in the future.
Cc: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Now we in fact don't allow XDP for big packets, remove its codes.
Cc: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When VIRTIO_NET_F_GUEST_UFO is negotiated, host could still send UFO
packet that exceeds a single page which could not be handled
correctly by XDP. So this patch forbids setting XDP when GUEST_UFO is
supported. While at it, forbid XDP for ECN (which comes only from GRO)
too to prevent user from misconfiguration.
Cc: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
We don't update ewma rx buf size in the case of XDP. This will lead
underestimation of rx buf size which causes host to produce more than
one buffers. This will greatly increase the possibility of XDP page
linearization.
Cc: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
We drop csumed packet when do XDP for packets. This breaks
XDP_PASS when GUEST_CSUM is supported. Fix this by allowing csum flag
to be set. With this patch, simple TCP works for XDP_PASS.
Cc: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When XDP_PASS were determined for linearized packets, we try to get
new buffers in the virtqueue and build skbs from them. This is wrong,
we should create skbs based on existed buffers instead. Fixing them by
creating skb based on xdp_page.
With this patch "ping 192.168.100.4 -s 3900 -M do" works for XDP_PASS.
Cc: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
We don't put page during linearizing, the would cause leaking when
xmit through XDP_TX or the packet exceeds PAGE_SIZE. Fix them by
put page accordingly. Also decrease the number of buffers during
linearizing to make sure caller can free buffers correctly when packet
exceeds PAGE_SIZE. With this patch, we won't get OOM after linearize
huge number of packets.
Cc: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
After we linearize page, we should xmit this page instead of the page
of first buffer which may lead unexpected result. With this patch, we
can see correct packet during XDP_TX.
Cc: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Since we use EWMA to estimate the size of rx buffer. When rx buffer
size is underestimated, it's usual to have a packet with more than one
buffers. Consider this is not a bug, remove the warning and correct
the comment before XDP linearizing.
Cc: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Merge tag 'befs-v4.10-rc1' of git://github.com/luisbg/linux-befs
Pull befs updates from Luis de Bethencourt:
"A series of small fixes and adding NFS export support"
* tag 'befs-v4.10-rc1' of git://github.com/luisbg/linux-befs:
befs: add NFS export support
befs: remove trailing whitespaces
befs: remove signatures from comments
befs: fix style issues in header files
befs: fix style issues in linuxvfs.c
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befs: fix style issues in io.c
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befs: fix style issues in debug.c
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Merge tag 'drm-fixes-for-4.10-rc1' of git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
"Some fixes came in while I was out, mostly intel and amdgpu ones, with
one ast fix"
Daniel Vetter says:
"This should also shut up the WARN_ON(!intel_dp->lane_count) noise"
* tag 'drm-fixes-for-4.10-rc1' of git://people.freedesktop.org/~airlied/linux: (35 commits)
drm/amdgpu: update tile table for oland/hainan
drm/amdgpu: update tile table for verde
drm/amdgpu: update rev id for verde
drm/amdgpu: update golden setting for verde
drm/amdgpu: update rev id for oland
drm/amdgpu: update golden setting for oland
drm/amdgpu: update rev id for hainan
drm/amdgpu: update golden setting for hainan
drm/amdgpu: update rev id for pitcairn
drm/amdgpu: update golden setting for pitcairn
drm/amdgpu: update golden setting/tiling table of tahiti
drm/i915: skip the first 4k of stolen memory on everything >= gen8
drm/i915: Fallback to single PAGE_SIZE segments for DMA remapping
drm/i915: Fix use after free in logical_render_ring_init
drm/i915: disable PSR by default on HSW/BDW
drm/i915: Fix setting of boost freq tunable
drm/i915: tune down the fast link training vs boot fail
drm/i915: Reorder phys backing storage release
drm/i915/gen9: Fix PCODE polling during SAGV disabling
drm/i915/gen9: Fix PCODE polling during CDCLK change notification
...
- Series of qedr fixes
- Series of rxe fixes
- One isolated i40iw fix
- One isolated cma fix
- One isolated cxgb4 fix
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma
Pull rdma fixes from Doug Ledford:
"First round of -rc fixes for 4.10 kernel:
- a series of qedr fixes
- a series of rxe fixes
- one i40iw fix
- one cma fix
- one cxgb4 fix"
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma:
IB/rxe: Don't check for null ptr in send()
IB/rxe: Drop future atomic/read packets rather than retrying
IB/rxe: Use BTH_PSN_MASK when ACKing duplicate sends
qedr: Always notify the verb consumer of flushed CQEs
qedr: clear the vendor error field in the work completion
qedr: post_send/recv according to QP state
qedr: ignore inline flag in read verbs
qedr: modify QP state to error when destroying it
qedr: return correct value on modify qp
qedr: return error if destroy CQ failed
qedr: configure the number of CQEs on CQ creation
i40iw: Set 128B as the only supported RQ WQE size
IB/cma: Fix a race condition in iboe_addr_get_sgid()
IB/rxe: Fix a memory leak in rxe_qp_cleanup()
iw_cxgb4: set correct FetchBurstMax for QPs
This is mostly stuff which missed the initial pull. There's a new
driver: qedi, some ufs, ibmvscsis and ncr5380 updates plus some
assorted driver fixes and also a fix for the bug where if a device
goes into a blocked state between configuration and sysfs device add
(which can be a long time under async probing) it would become
permanently blocked.
Signed-off-by: James E.J. Bottomley <jejb@linux.vnet.ibm.com>
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Merge tag 'scsi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull late SCSI updates from James Bottomley:
"This is mostly stuff which missed the initial pull.
There's a new driver: qedi, and some ufs, ibmvscsis and ncr5380
updates plus some assorted driver fixes and also a fix for the bug
where if a device goes into a blocked state between configuration and
sysfs device add (which can be a long time under async probing) it
would become permanently blocked"
* tag 'scsi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (30 commits)
scsi: avoid a permanent stop of the scsi device's request queue
scsi: mpt3sas: Recognize and act on iopriority info
scsi: qla2xxx: Fix Target mode handling with Multiqueue changes.
scsi: qla2xxx: Add Block Multi Queue functionality.
scsi: qla2xxx: Add multiple queue pair functionality.
scsi: qla2xxx: Utilize pci_alloc_irq_vectors/pci_free_irq_vectors calls.
scsi: qla2xxx: Only allow operational MBX to proceed during RESET.
scsi: hpsa: remove memory allocate failure message
scsi: Update 3ware driver email addresses
scsi: zfcp: fix rport unblock race with LUN recovery
scsi: zfcp: do not trace pure benign residual HBA responses at default level
scsi: zfcp: fix use-after-"free" in FC ingress path after TMF
scsi: libcxgbi: return error if interface is not up
scsi: cxgb4i: libcxgbi: add missing module_put()
scsi: cxgb4i: libcxgbi: cxgb4: add T6 iSCSI completion feature
scsi: cxgb4i: libcxgbi: add active open cmd for T6 adapters
scsi: cxgb4i: use cxgb4_tp_smt_idx() to get smt_idx
scsi: qedi: Add QLogic FastLinQ offload iSCSI driver framework.
scsi: aacraid: remove wildcard for series 9 controllers
scsi: ibmvscsi: add write memory barrier to CRQ processing
...
Thomas Gleixner
Len Brown
Linus Torvalds
Tariq Toukan
Jon Paul Maloy
Mahesh Bandewar
Eric Dumazet
Steve Wahl
Christophe JAILLET
Dave Jiang
Steven Wahl
Shyam Sundar S K
Xiangliang Yu
Josh Poimboeuf
Ingo Molnar
Marcelo Ricardo Leitner
David S. Miller
Jason Wang