diff options
| author | Muchun Song <[email protected]> | 2022-03-22 14:41:31 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2022-03-22 15:57:03 -0700 |
| commit | be740503ed03ea04ca362330baf082e6a38fe462 (patch) | |
| tree | 2df96c33adf9af0fb55341babae484022f726e1b | |
| parent | f9c69d6346bc6934369c80b316fa277bc96ffa77 (diff) | |
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/[email protected]
Signed-off-by: Muchun Song <[email protected]>
Cc: Alex Shi <[email protected]>
Cc: Anna Schumaker <[email protected]>
Cc: Chao Yu <[email protected]>
Cc: Dave Chinner <[email protected]>
Cc: Fam Zheng <[email protected]>
Cc: Jaegeuk Kim <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Kari Argillander <[email protected]>
Cc: Matthew Wilcox (Oracle) <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Qi Zheng <[email protected]>
Cc: Roman Gushchin <[email protected]>
Cc: Shakeel Butt <[email protected]>
Cc: Theodore Ts'o <[email protected]>
Cc: Trond Myklebust <[email protected]>
Cc: Vladimir Davydov <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Cc: Wei Yang <[email protected]>
Cc: Xiongchun Duan <[email protected]>
Cc: Yang Shi <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
| -rw-r--r-- | mm/memcontrol.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 4af673350377..33ad13d69bda 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -5088,8 +5088,7 @@ static struct mem_cgroup *mem_cgroup_alloc(void) 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; |