The quilt patch titled
Subject: mm/memcg: set memcg after css verified and got reference
has been removed from the -mm tree. Its filename was
mm-memcg-set-memcg-after-css-verified-and-got-reference.patch
This patch was dropped because it was merged into mm-stable
------------------------------------------------------
From: Wei Yang <richard.weiyang@xxxxxxxxx>
Subject: mm/memcg: set memcg after css verified and got reference
Patch series "mm/memcg: some cleanup for mem_cgroup_iter()", v2.
No functional change, try to make it more readable.
This patch (of 3):
Instead of resetting memcg when css is either not verified or not got
reference, we can set it after these process.
No functional change, just simplified the code a little.
Link: https://lkml.kernel.org/r/20220330234719.18340-1-richard.weiyang@xxxxxxxxx
Link: https://lkml.kernel.org/r/20220330234719.18340-2-richard.weiyang@xxxxxxxxx
Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxx>
Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Reviewed-by: Roman Gushchin <roman.gushchin@xxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Shakeel Butt <shakeelb@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memcontrol.c | 11 +++--------
1 file changed, 3 insertions(+), 8 deletions(-)
--- a/mm/memcontrol.c~mm-memcg-set-memcg-after-css-verified-and-got-reference
+++ a/mm/memcontrol.c
@@ -1065,15 +1065,10 @@ struct mem_cgroup *mem_cgroup_iter(struc
* is provided by the caller, so we know it's alive
* and kicking, and don't take an extra reference.
*/
- memcg = mem_cgroup_from_css(css);
-
- if (css == &root->css)
- break;
-
- if (css_tryget(css))
+ if (css == &root->css || css_tryget(css)) {
+ memcg = mem_cgroup_from_css(css);
break;
-
- memcg = NULL;
+ }
}
if (reclaim) {
_
Patches currently in -mm which might be from richard.weiyang@xxxxxxxxx are
mm-vmscan-not-necessary-to-re-init-the-list-for-each-iteration.patch
mm-vmscan-filter-empty-page_list-at-the-beginning.patch
mm-vmscan-not-use-numa_no_node-as-indicator-of-page-on-different-node.patch
