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WSL2-Linux-Kernel
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The source for the Linux kernel used in Windows Subsystem for Linux 2 (WSL2)
720 173 коммитов 10 Ветки 3 162 Теги 3,2 GiB
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Ross Zwisler 4384cd4bb0 jbd2: introduce jbd2_inode dirty range scoping 
commit 6ba0e7dc64 upstream.

Currently both journal_submit_inode_data_buffers() and
journal_finish_inode_data_buffers() operate on the entire address space
of each of the inodes associated with a given journal entry.  The
consequence of this is that if we have an inode where we are constantly
appending dirty pages we can end up waiting for an indefinite amount of
time in journal_finish_inode_data_buffers() while we wait for all the
pages under writeback to be written out.

The easiest way to cause this type of workload is do just dd from
/dev/zero to a file until it fills the entire filesystem.  This can
cause journal_finish_inode_data_buffers() to wait for the duration of
the entire dd operation.

We can improve this situation by scoping each of the inode dirty ranges
associated with a given transaction.  We do this via the jbd2_inode
structure so that the scoping is contained within jbd2 and so that it
follows the lifetime and locking rules for that structure.

This allows us to limit the writeback & wait in
journal_submit_inode_data_buffers() and
journal_finish_inode_data_buffers() respectively to the dirty range for
a given struct jdb2_inode, keeping us from waiting forever if the inode
in question is still being appended to.

Signed-off-by: Ross Zwisler <zwisler@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2019-07-31 07:28:47 +02:00
Documentation dt-bindings: allow up to four clocks for orion-mdio 2019-07-31 07:28:43 +02:00
arch MIPS: lb60: Fix pin mappings 2019-07-31 07:28:47 +02:00
block block, bfq: NULL out the bic when it's no longer valid 2019-07-21 09:04:30 +02:00
certs Replace magic for trusting the secondary keyring with #define 2018-09-09 19:55:54 +02:00
crypto crypto: chacha20poly1305 - fix atomic sleep when using async algorithm 2019-07-31 07:28:35 +02:00
drivers dma-buf: Discard old fence_excl on retrying get_fences_rcu for realloc 2019-07-31 07:28:47 +02:00
firmware License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
fs jbd2: introduce jbd2_inode dirty range scoping 2019-07-31 07:28:47 +02:00
include jbd2: introduce jbd2_inode dirty range scoping 2019-07-31 07:28:47 +02:00
init init: initialize jump labels before command line option parsing 2019-05-16 19:42:23 +02:00
ipc ipc: prevent lockup on alloc_msg and free_msg 2019-06-15 11:54:51 +02:00
kernel padata: use smp_mb in padata_reorder to avoid orphaned padata jobs 2019-07-31 07:28:39 +02:00
lib lib/strscpy: Shut up KASAN false-positives in strscpy() 2019-07-31 07:28:44 +02:00
mm mm: add filemap_fdatawait_range_keep_errors() 2019-07-31 07:28:47 +02:00
net net: bridge: stp: don't cache eth dest pointer before skb pull 2019-07-31 07:28:46 +02:00
samples samples, bpf: fix to change the buffer size for read() 2019-07-21 09:04:17 +02:00
scripts scripts/decode_stacktrace.sh: prefix addr2line with $CROSS_COMPILE 2019-07-10 09:54:36 +02:00
security apparmor: enforce nullbyte at end of tag string 2019-06-25 11:36:51 +08:00
sound ALSA: hda/realtek: apply ALC891 headset fixup to one Dell machine 2019-07-31 07:28:38 +02:00
tools perf stat: Make metric event lookup more robust 2019-07-31 07:28:32 +02:00
usr initramfs: fix initramfs rebuilds w/ compression after disabling 2017-11-03 07:39:19 -07:00
virt KVM: arm/arm64: vgic: Fix kvm_device leak in vgic_its_destroy 2019-07-21 09:04:24 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore Add hch to .get_maintainer.ignore 2015-08-21 14:30:10 -07:00
.gitattributes .gitattributes: set git diff driver for C source code files 2016-10-07 18:46:30 -07:00
.gitignore kbuild: rpm-pkg: keep spec file until make mrproper 2018-02-13 10:19:46 +01:00
.mailmap .mailmap: Add Maciej W. Rozycki's Imagination e-mail address 2017-11-10 12:16:15 -08:00
COPYING
…
CREDITS MAINTAINERS: update TPM driver infrastructure changes 2017-11-09 17:58:40 -08:00
Kbuild License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Kconfig License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
MAINTAINERS MAINTAINERS: Add Sasha as a stable branch maintainer 2018-12-01 09:42:50 +01:00
Makefile Linux 4.14.134 2019-07-21 09:04:43 +02:00
README README: add a new README file, pointing to the Documentation/ 2016-10-24 08:12:35 -02:00

README 

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.