The patch titled
Subject: mm: correctly charge compressed memory to its memcg
has been added to the -mm mm-hotfixes-unstable branch. Its filename is
mm-correctly-charge-compressed-memory-to-its-memcg.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-correctly-charge-compressed-memory-to-its-memcg.patch
This patch will later appear in the mm-hotfixes-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Li Liguang <liliguang@xxxxxxxxx>
Subject: mm: correctly charge compressed memory to its memcg
Date: Mon, 14 Nov 2022 14:48:28 -0500
Kswapd will reclaim memory when memory pressure is high, the annonymous
memory will be compressed and stored in the zpool if zswap is enabled.
The memcg_kmem_bypass() in get_obj_cgroup_from_page() will bypass the
kernel thread and cause the compressed memory not be charged to its memory
cgroup.
Remove the memcg_kmem_bypass() call and properly charge compressed memory
to its corresponding memory cgroup.
Link: https://lore.kernel.org/linux-mm/CALvZod4nnn8BHYqAM4xtcR0Ddo2-Wr8uKm9h_CHWUaXw7g_DCg@xxxxxxxxxxxxxx/
Link: https://lkml.kernel.org/r/20221114194828.100822-1-hannes@xxxxxxxxxxx
Fixes: f4840ccfca25 ("zswap: memcg accounting")
Signed-off-by: Li Liguang <liliguang@xxxxxxxxx>
Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Acked-by: Shakeel Butt <shakeelb@xxxxxxxxxx>
Reviewed-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Roman Gushchin <roman.gushchin@xxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> [5.19+]
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memcontrol.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/memcontrol.c~mm-correctly-charge-compressed-memory-to-its-memcg
+++ a/mm/memcontrol.c
@@ -3026,7 +3026,7 @@ struct obj_cgroup *get_obj_cgroup_from_p
{
struct obj_cgroup *objcg;
- if (!memcg_kmem_enabled() || memcg_kmem_bypass())
+ if (!memcg_kmem_enabled())
return NULL;
if (PageMemcgKmem(page)) {
_
Patches currently in -mm which might be from liliguang@xxxxxxxxx are
mm-correctly-charge-compressed-memory-to-its-memcg.patch
