+ memcg-fix-up-drain_local_stock-comment.patch added to -mm tree

+ memcg-fix-up-drain_local_stock-comment.patch added to -mm tree

[akpm]

The patch titled
     Subject: memcg: fix up drain_local_stock comment
has been added to the -mm tree.  Its filename is
     memcg-fix-up-drain_local_stock-comment.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/memcg-fix-up-drain_local_stock-comment.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/memcg-fix-up-drain_local_stock-comment.patch

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next and is updated
there every 3-4 working days

------------------------------------------------------
From: Michal Hocko <mhocko@suse.com>
Subject: memcg: fix up drain_local_stock comment

Thomas and Vlastimil have noticed that the comment in drain_local_stock
doesn't quite make sense.  It talks about a synchronization with the
memory hotplug but there is no actual memory hotplug involvement here.  I
meant to talk about cpu hotplug here.  Fix that up and hopefuly make the
comment more helpful by referencing the cpu hotplug callback as well.

Link: https://lkml.kernel.org/r/YRDwOhVglJmY7ES5@dhcp22.suse.cz
Signed-off-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/memcontrol.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/mm/memcontrol.c~memcg-fix-up-drain_local_stock-comment
+++ a/mm/memcontrol.c
@@ -2178,8 +2178,9 @@ static void drain_local_stock(struct wor
 	unsigned long flags;
 
 	/*
-	 * The only protection from memory hotplug vs. drain_stock races is
-	 * that we always operate on local CPU stock here with IRQ disabled
+	 * The only protection from cpu hotplug (memcg_hotplug_cpu_dead) vs.
+	 * drain_stock races is that we always operate on local CPU stock
+	 * here with IRQ disabled
 	 */
 	local_irq_save(flags);
 
_

Patches currently in -mm which might be from mhocko@suse.com are

memcg-fix-up-drain_local_stock-comment.patch