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| author |   Qi Zheng <zhengqi.arch@bytedance.com> | 2023-03-13 19:28:17 +0800 |
|---|---|---|
| committer |   Andrew Morton <akpm@linux-foundation.org> | 2023-03-28 16:20:17 -0700 |
| commit | b3cabea3c9153fd42fe5cb851ac58b51ea2b32b8 (patch) | |
| tree | 9c260b994844cdb5f25c30b003280938ca46d261 /mm/shrinker_debug.c | |
| parent | mm: shrinkers: make count and scan in shrinker debugfs lockless (diff) | |
| download | wireguard-linux-b3cabea3c9153fd42fe5cb851ac58b51ea2b32b8.tar.xz wireguard-linux-b3cabea3c9153fd42fe5cb851ac58b51ea2b32b8.zip | |
mm: vmscan: hold write lock to reparent shrinker nr_deferred
For now, reparent_shrinker_deferred() is the only holder of read lock of
shrinker_rwsem. And it already holds the global cgroup_mutex, so it will
not be called in parallel.
Therefore, in order to convert shrinker_rwsem to shrinker_mutex later,
here we change to hold the write lock of shrinker_rwsem to reparent.
Link: https://lkml.kernel.org/r/20230313112819.38938-7-zhengqi.arch@bytedance.com
Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Kirill Tkhai <tkhai@ya.ru>
Acked-by: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Christian König <christian.koenig@amd.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Paul E. McKenney <paulmck@kernel.org>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Sultan Alsawaf <sultan@kerneltoast.com>
Cc: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Cc: Yang Shi <shy828301@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/shrinker_debug.c')
0 files changed, 0 insertions, 0 deletions