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Jens Axboe f8ee8909ac mm: move more expensive part of XA setup out of mapping check 
The fast path here is not needing any writeback, yet we spend time
setting up the xarray lookup data upfront.  Move the part that actually
needs to iterate the address space mapping into a separate helper,
saving ~30% of the time here.

Link: https://lkml.kernel.org/r/49f67983-b802-8929-edab-d807f745c9ca@kernel.dk
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-11-06 13:30:34 -07:00
arch
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
2021-10-31 11:19:02 -07:00
block
Merge tag 'block-5.15-2021-10-29' of git://git.kernel.dk/linux-block
2021-10-29 11:10:29 -07:00
certs
certs: Add support for using elliptic curve keys for signing modules
2021-08-23 19:55:42 +03:00
crypto
Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
2021-08-30 12:57:10 -07:00
Documentation
Merge tag 'net-5.15-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2021-10-28 10:17:31 -07:00
drivers
mtd: call bdi_unregister explicitly
2021-11-06 13:30:34 -07:00
fs
fs: explicitly unregister per-superblock BDIs
2021-11-06 13:30:34 -07:00
include
mm: simplify bdi refcounting
2021-11-06 13:30:34 -07:00
init
mm: disable NUMA_BALANCING_DEFAULT_ENABLED and TRANSPARENT_HUGEPAGE on PREEMPT_RT
2021-11-06 13:30:33 -07:00
ipc
ipc: remove memcg accounting for sops objects in do_semtimedop()
2021-09-14 10:22:11 -07:00
kernel
workqueue, kasan: avoid alloc_pages() when recording stack
2021-11-06 13:30:33 -07:00
lib
kasan: test: bypass __alloc_size checks
2021-11-06 13:30:33 -07:00
LICENSES
LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes"
2021-07-15 06:31:24 -06:00
mm
mm: move more expensive part of XA setup out of mapping check
2021-11-06 13:30:34 -07:00
net
mptcp: fix corrupt receiver key in MPC + data + checksum
2021-10-28 08:19:06 -07:00
samples
samples/bpf: Relicense bpf_insn.h as GPL-2.0-only OR BSD-2-Clause
2021-09-29 16:03:55 +02:00
scripts
Compiler Attributes: add __alloc_size() for better bounds checking
2021-11-06 13:30:33 -07:00
security
Merge branch 'ucount-fixes-for-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2021-10-21 17:27:17 -10:00
sound
ALSA: usb-audio: Fix microphone sound on Jieli webcam.
2021-10-19 08:07:01 +02:00
tools
perf script: Fix PERF_SAMPLE_WEIGHT_STRUCT support
2021-10-31 12:51:41 -03:00
usr
.gitignore: prefix local generated files with a slash
2021-05-02 00:43:35 +09:00
virt
KVM: Remove tlbs_dirty
2021-09-23 11:01:12 -04:00
.clang-format
clang-format: Update with the latest for_each macro list
2021-05-12 23:32:39 +02:00
.cocciconfig
scripts: add Linux .cocciconfig for coccinelle
2016-07-22 12:13:39 +02:00
.get_maintainer.ignore
Opt out of scripts/get_maintainer.pl
2019-05-16 10:53:40 -07:00
.gitattributes
.gitattributes: use 'dts' diff driver for dts files
2019-12-04 19:44:11 -08:00
.gitignore
.gitignore: ignore only top-level modules.builtin
2021-05-02 00:43:35 +09:00
.mailmap
mailmap: add Andrej Shadura
2021-10-18 20:22:03 -10:00
COPYING
COPYING: state that all contributions really are covered by this file
2020-02-10 13:32:20 -08:00
CREDITS
MAINTAINERS: Move Daniel Drake to credits
2021-09-21 08:34:58 +03:00
Kbuild
kbuild: rename hostprogs-y/always to hostprogs/always-y
2020-02-04 01:53:07 +09:00
Kconfig
kbuild: ensure full rebuild when the compiler is updated
2020-05-12 13:28:33 +09:00
MAINTAINERS
Merge tag 'drm-fixes-2021-10-29' of git://anongit.freedesktop.org/drm/drm
2021-10-28 12:17:01 -07:00
Makefile
Compiler Attributes: add __alloc_size() for better bounds checking
2021-11-06 13:30:33 -07:00
README
Drop all 00-INDEX files from Documentation/
2018-09-09 15:08:58 -06:00

README 

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

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

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.
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