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| author | Alex Shi <alex.shi@linux.alibaba.com> | 2021-02-24 12:09:25 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-02-24 13:38:34 -0800 |
| commit | d99fd5feb0ac1d56c36c760a8d922a46bd6c5521 (patch) | |
| tree | 2e22ddedd1e89d0eef7aa78f4a357605bd8b803a /tools/perf/scripts/python/syscall-counts.py | |
| parent | c457cd96f18c7137287700c409d2ae16c6395256 (diff) | |
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>
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts.py')
0 files changed, 0 insertions, 0 deletions