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| author | Alex Shi <alex.shi@linux.alibaba.com> | 2021-02-24 12:03:51 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-02-24 13:38:29 -0800 |
| commit | f9b1038ebccad354256cf84749cbc321b5347497 (patch) | |
| tree | 38f668453686927f49584688ed968651c62b4c8f /kernel/fork.c | |
| parent | d7e3aba583e6d13a81932597c5ee8da3c8b6af04 (diff) | |
| download | linux-stable-f9b1038ebccad354256cf84749cbc321b5347497.tar.gz linux-stable-f9b1038ebccad354256cf84749cbc321b5347497.tar.bz2 linux-stable-f9b1038ebccad354256cf84749cbc321b5347497.zip | |
mm/memcg: remove rcu locking for lock_page_lruvec function series
lock_page_lruvec() and its variants used rcu_read_lock() with the
intention of safeguarding against the mem_cgroup being destroyed
concurrently; but so long as they are called under the specified
conditions (as they are), there is no way for the page's mem_cgroup to be
destroyed. Delete the unnecessary rcu_read_lock() and _unlock().
Hugh Dickins polished the commit log. Thanks a lot!
Link: https://lkml.kernel.org/r/1608614453-10739-2-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>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/fork.c')
0 files changed, 0 insertions, 0 deletions