+ mm-memcg-make-stats-flushing-threshold-per-memcg-fix.patch added to mm-unstable branch

+ mm-memcg-make-stats-flushing-threshold-per-memcg-fix.patch added to mm-unstable branch

[Andrew Morton]

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The patch titled
     Subject: mm: memcg: clear percpu stats_pending during stats flush
has been added to the -mm mm-unstable branch.  Its filename is
     mm-memcg-make-stats-flushing-threshold-per-memcg-fix.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-memcg-make-stats-flushing-threshold-per-memcg-fix.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Yosry Ahmed <yosryahmed@google.com>
Subject: mm: memcg: clear percpu stats_pending during stats flush
Date: Tue, 17 Oct 2023 23:07:59 +0000

When flushing memcg stats, we clear the per-memcg count of pending stat
updates, as they are captured by the flush. Also clear the percpu count
for the cpu being flushed.

Link: https://lkml.kernel.org/r/CAJD7tkZDarDn_38ntFg5bK2fAmFdSe+Rt6DKOZA7Sgs_kERoVA@mail.gmail.com
Signed-off-by: Yosry Ahmed <yosryahmed@google.com>
Suggested-by: Wei Xu <weixugc@google.com>
Cc: Domenico Cerasuolo <cerasuolodomenico@gmail.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: Ivan Babrou <ivan@cloudflare.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Michal Koutný <mkoutny@suse.com>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Tejun heo <tj@kernel.org>
Cc: Waiman Long <longman@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/memcontrol.c |    1 +
 1 file changed, 1 insertion(+)

--- a/mm/memcontrol.c~mm-memcg-make-stats-flushing-threshold-per-memcg-fix
+++ a/mm/memcontrol.c
@@ -5728,6 +5728,7 @@ static void mem_cgroup_css_rstat_flush(s
 			}
 		}
 	}
+	statc->stats_updates = 0;
 	/* We are in a per-cpu loop here, only do the atomic write once */
 	if (atomic64_read(&memcg->vmstats->stats_updates))
 		atomic64_set(&memcg->vmstats->stats_updates, 0);
_

Patches currently in -mm which might be from yosryahmed@google.com are

mm-memcg-refactor-page-state-unit-helpers.patch
mm-memcg-normalize-the-value-passed-into-memcg_rstat_updated.patch
mm-memcg-change-flush_next_time-to-flush_last_time.patch
mm-memcg-move-vmstats-structs-definition-above-flushing-code.patch
mm-memcg-make-stats-flushing-threshold-per-memcg.patch
mm-memcg-make-stats-flushing-threshold-per-memcg-fix.patch
mm-workingset-move-the-stats-flush-into-workingset_test_recent.patch
mm-memcg-restore-subtree-stats-flushing.patch