The patch titled
Subject: mm: memcontrol: fix cannot alloc the maximum memcg ID
has been removed from the -mm tree. Its filename was
mm-memcontrol-fix-cannot-alloc-the-maximum-memcg-id.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Muchun Song <songmuchun@xxxxxxxxxxxxx>
Subject: mm: memcontrol: fix cannot alloc the maximum memcg ID
The idr_alloc() does not include @max ID. So in the current
implementation, the maximum memcg ID is 65534 instead of 65535. It seems
a bug. So fix this.
Link: https://lkml.kernel.org/r/20220228122126.37293-15-songmuchun@xxxxxxxxxxxxx
Signed-off-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>
Cc: Alex Shi <alexs@xxxxxxxxxx>
Cc: Anna Schumaker <Anna.Schumaker@xxxxxxxxxx>
Cc: Chao Yu <chao@xxxxxxxxxx>
Cc: Dave Chinner <david@xxxxxxxxxxxxx>
Cc: Fam Zheng <fam.zheng@xxxxxxxxxxxxx>
Cc: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Kari Argillander <kari.argillander@xxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>
Cc: Roman Gushchin <roman.gushchin@xxxxxxxxx>
Cc: Shakeel Butt <shakeelb@xxxxxxxxxx>
Cc: Theodore Ts'o <tytso@xxxxxxx>
Cc: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
Cc: Vladimir Davydov <vdavydov.dev@xxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Wei Yang <richard.weiyang@xxxxxxxxx>
Cc: Xiongchun Duan <duanxiongchun@xxxxxxxxxxxxx>
Cc: Yang Shi <shy828301@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memcontrol.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/mm/memcontrol.c~mm-memcontrol-fix-cannot-alloc-the-maximum-memcg-id
+++ a/mm/memcontrol.c
@@ -5088,8 +5088,7 @@ static struct mem_cgroup *mem_cgroup_all
return ERR_PTR(error);
memcg->id.id = idr_alloc(&mem_cgroup_idr, NULL,
- 1, MEM_CGROUP_ID_MAX,
- GFP_KERNEL);
+ 1, MEM_CGROUP_ID_MAX + 1, GFP_KERNEL);
if (memcg->id.id < 0) {
error = memcg->id.id;
goto fail;
_
Patches currently in -mm which might be from songmuchun@xxxxxxxxxxxxx are
