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mm: vmscan: reset sc->priority on retry

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The commit 6be5e186fd65 ("mm: vmscan: restore incremental cgroup
iteration") added a retry reclaim heuristic to iterate all the cgroups
before returning an unsuccessful reclaim but missed to reset the
sc->priority.  Let's fix it.

Link: https://lkml.kernel.org/r/20240529154911.3008025-1-shakeel.butt@linux.dev
Fixes: 6be5e186fd65 ("mm: vmscan: restore incremental cgroup iteration")
Signed-off-by: Shakeel Butt <shakeel.butt@linux.dev>
Reported-by: syzbot+17416257cb95200cba44@syzkaller.appspotmail.com
Tested-by: syzbot+17416257cb95200cba44@syzkaller.appspotmail.com
Reviewed-by: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Rik van Riel <riel@surriel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Shakeel Butt 2024-05-29 08:49:11 -07:00 committed by Andrew Morton
parent b82b530740
commit 462966dc7d
1 changed files with 1 additions and 0 deletions
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mm/vmscan.c
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@ -6304,6 +6304,7 @@ static unsigned long do_try_to_free_pages(struct zonelist *zonelist,
* meaningful forward progress. Avoid false OOMs in this case.
*/
if (!sc->memcg_full_walk) {
sc->priority = initial_priority;
sc->memcg_full_walk = 1;
goto retry;
}