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Alex Shi d99fd5feb0 mm/compaction: remove rcu_read_lock during page compaction 
isolate_migratepages_block() used rcu_read_lock() with the intention of
safeguarding against the mem_cgroup being destroyed concurrently; but
its TestClearPageLRU already protects against that.  Delete the
unnecessary rcu_read_lock() and _unlock().

Hugh Dickins helped on commit log polishing, Thanks!

Link: https://lkml.kernel.org/r/1608614453-10739-3-git-send-email-alex.shi@linux.alibaba.com
Signed-off-by: Alex Shi <alex.shi@linux.alibaba.com>
Acked-by: Hugh Dickins <hughd@google.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-02-24 13:38:34 -08:00
arch MIPS: do not call flush_tlb_all when setting pmd entry 2021-02-24 13:38:32 -08:00
block
certs
crypto Keyrings miscellany 2021-02-23 16:09:23 -08:00
Documentation mm/vmscan: restore zone_reclaim_mode ABI 2021-02-24 13:38:34 -08:00
drivers video: fbdev: acornfb: remove free_unused_pages() 2021-02-24 13:38:31 -08:00
fs hugetlb: convert page_huge_active() HPageMigratable flag 2021-02-24 13:38:34 -08:00
include include/linux/hugetlb.h: add synchronization information for new hugetlb specific flags 2021-02-24 13:38:34 -08:00
init mm, slub: remove slub_memcg_sysfs boot param and CONFIG_SLUB_MEMCG_SYSFS_ON 2021-02-24 13:38:27 -08:00
ipc
kernel Keyrings miscellany 2021-02-23 16:09:23 -08:00
lib kasan: don't run tests when KASAN is not enabled 2021-02-24 13:38:31 -08:00
LICENSES
mm mm/compaction: remove rcu_read_lock during page compaction 2021-02-24 13:38:34 -08:00
net idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
samples Keyrings miscellany 2021-02-23 16:09:23 -08:00
scripts scripts/spelling.txt: add more spellings to spelling.txt 2021-02-24 13:38:26 -08:00
security Keyrings miscellany 2021-02-23 16:09:23 -08:00
sound
tools kasan: prefix global functions with kasan_ 2021-02-24 13:38:30 -08:00
usr
virt
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COPYING
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MAINTAINERS dmaengine updates for v5.12-rc1 2021-02-23 15:05:10 -08:00
Makefile clang-lto for v5.12-rc1 (part2) 2021-02-23 15:13:45 -08:00
README

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.