lkml.org 
[lkml]   [2023]   [Jun]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH RESEND] mm: vmscan: move shrinker_debugfs_remove() before synchronize_srcu()
Date
From: Qi Zheng <zhengqi.arch@bytedance.com>

The debugfs_remove_recursive() will wait for debugfs_file_put()
to return, so there is no need to put it after synchronize_srcu()
to wait for the rcu read-side critical section to exit.

Just move it before synchronize_srcu(), which is also convenient
to put the heavy synchronize_srcu() in the delayed work later.

Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
---
Resend as an independent patch.

mm/vmscan.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/vmscan.c b/mm/vmscan.c
index eeca83e28c9b..a773e97e152e 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -818,11 +818,11 @@ void unregister_shrinker(struct shrinker *shrinker)
debugfs_entry = shrinker_debugfs_detach(shrinker, &debugfs_id);
mutex_unlock(&shrinker_mutex);

+ shrinker_debugfs_remove(debugfs_entry, debugfs_id);
+
atomic_inc(&shrinker_srcu_generation);
synchronize_srcu(&shrinker_srcu);

- shrinker_debugfs_remove(debugfs_entry, debugfs_id);
-
kfree(shrinker->nr_deferred);
shrinker->nr_deferred = NULL;
}
--
2.30.2
\
 
 \ /
  Last update: 2023-06-01 15:29    [W:0.056 / U:0.092 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site