+ mm-correctly-charge-compressed-memory-to-its-memcg.patch added to mm-hotfixes-unstable branch

+ mm-correctly-charge-compressed-memory-to-its-memcg.patch added to mm-hotfixes-unstable branch

[Andrew Morton]

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@baidu.com>
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@mail.gmail.com/
Link: https://lkml.kernel.org/r/20221114194828.100822-1-hannes@cmpxchg.org
Fixes: f4840ccfca25 ("zswap: memcg accounting")
Signed-off-by: Li Liguang <liliguang@baidu.com>
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Shakeel Butt <shakeelb@google.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: <stable@vger.kernel.org>	[5.19+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 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@baidu.com are

mm-correctly-charge-compressed-memory-to-its-memcg.patch