The patch titled
Subject: mm/page_counter: remove an incorrect call to propagate_protected_usage()
has been added to the -mm tree. Its filename is
mm-page_counter-remove-an-incorrect-call-to-propagate_protected_usage.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-page_counter-remove-an-incorrect-call-to-propagate_protected_usage.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-page_counter-remove-an-incorrect-call-to-propagate_protected_usage.patch
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------------------------------------------------------
From: Donghai Qiao <dqiao@xxxxxxxxxx>
Subject: mm/page_counter: remove an incorrect call to propagate_protected_usage()
propagate_protected_usage() is called to propagate the usage change in the
page_counter structure. But there is a call to this function from
page_counter_try_charge() when there is actually no usage change. Hence
this call should be removed.
Link: https://lkml.kernel.org/r/20211118181125.3918222-1-dqiao@xxxxxxxxxx
Signed-off-by: Donghai Qiao <dqiao@xxxxxxxxxx>
Reviewed-by: Roman Gushchin <guro@xxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_counter.c | 1 -
1 file changed, 1 deletion(-)
--- a/mm/page_counter.c~mm-page_counter-remove-an-incorrect-call-to-propagate_protected_usage
+++ a/mm/page_counter.c
@@ -120,7 +120,6 @@ bool page_counter_try_charge(struct page
new = atomic_long_add_return(nr_pages, &c->usage);
if (new > c->max) {
atomic_long_sub(nr_pages, &c->usage);
- propagate_protected_usage(c, new);
/*
* This is racy, but we can live with some
* inaccuracy in the failcnt which is only used
_
Patches currently in -mm which might be from dqiao@xxxxxxxxxx are
mm-page_counter-remove-an-incorrect-call-to-propagate_protected_usage.patch
