The patch titled
Subject: memcg: bypass root memcg check for skmem charging
has been added to the -mm mm-unstable branch. Its filename is
memcg-bypass-root-memcg-check-for-skmem-charging.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/memcg-bypass-root-memcg-check-for-skmem-charging.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: Shakeel Butt <shakeel.butt@xxxxxxxxx>
Subject: memcg: bypass root memcg check for skmem charging
Date: Thu, 27 Feb 2025 18:23:54 -0800
The root memcg is never associated with a socket in mem_cgroup_sk_alloc,
so there is no need to check if the given memcg is root for the skmem
charging code path.
Link: https://lkml.kernel.org/r/20250228022354.2624249-1-shakeel.butt@xxxxxxxxx
Signed-off-by: Shakeel Butt <shakeel.butt@xxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Muchun Song <muchun.song@xxxxxxxxx>
Cc: Roman Gushchin (Cruise) <roman.gushchin@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memcontrol.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/memcontrol.c~memcg-bypass-root-memcg-check-for-skmem-charging
+++ a/mm/memcontrol.c
@@ -4888,7 +4888,7 @@ bool mem_cgroup_charge_skmem(struct mem_
if (!cgroup_subsys_on_dfl(memory_cgrp_subsys))
return memcg1_charge_skmem(memcg, nr_pages, gfp_mask);
- if (try_charge(memcg, gfp_mask, nr_pages) == 0) {
+ if (try_charge_memcg(memcg, gfp_mask, nr_pages) == 0) {
mod_memcg_state(memcg, MEMCG_SOCK, nr_pages);
return true;
}
_
Patches currently in -mm which might be from shakeel.butt@xxxxxxxxx are
memcg-add-hierarchical-effective-limits-for-v2.patch
memcg-dont-call-propagate_protected_usage-for-v1.patch
page_counter-track-failcnt-only-for-legacy-cgroups.patch
page_counter-reduce-struct-page_counter-size.patch
memcg-bypass-root-memcg-check-for-skmem-charging.patch
