diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-09-20 12:57:00 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-09-23 11:14:38 +0200 |
| commit | 1204b65e857d0fa02a78bd4f8385993359f05211 (patch) | |
| tree | c52b2fcbb8e6b50a18bc3845fc8c38081e80596a | |
| parent | 23e3c3f1f2b74b6b9ecc9dfd4a6b78cbb8d66a7f (diff) | |
Revert "memcg: drop kmem.limit_in_bytes"
This reverts commit 75bb29b6c44f486e9bd048759669c205dccb2048 which is
commit 86327e8eb94c52eca4f93cfece2e29d1bf52acbf upstream.
It breaks existing runc systems, as the tool always thinks the file
should be present.
Reported-by: Jeremi Piotrowski <jpiotrowski@linux.microsoft.com>
Link: https://lore.kernel.org/r/20230920081101.GA12096@linuxonhyperv3.guj3yctzbm1etfxqx2vob5hsef.xx.internal.cloudapp.net
Cc: Michal Hocko <mhocko@suse.com>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Tejun Heo <tj@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | Documentation/admin-guide/cgroup-v1/memory.rst | 2 | ||||
| -rw-r--r-- | mm/memcontrol.c | 10 |
2 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/admin-guide/cgroup-v1/memory.rst b/Documentation/admin-guide/cgroup-v1/memory.rst index 8d3afeede10e..fabaad3fd9c2 100644 --- a/Documentation/admin-guide/cgroup-v1/memory.rst +++ b/Documentation/admin-guide/cgroup-v1/memory.rst @@ -92,6 +92,8 @@ Brief summary of control files. memory.oom_control set/show oom controls. memory.numa_stat show the number of memory usage per numa node + memory.kmem.limit_in_bytes This knob is deprecated and writing to + it will return -ENOTSUPP. memory.kmem.usage_in_bytes show current kernel memory allocation memory.kmem.failcnt show the number of kernel memory usage hits limits diff --git a/mm/memcontrol.c b/mm/memcontrol.c index e79267c1eee0..4fe5a562d0bb 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -3871,6 +3871,10 @@ static ssize_t mem_cgroup_write(struct kernfs_open_file *of, case _MEMSWAP: ret = mem_cgroup_resize_max(memcg, nr_pages, true); break; + case _KMEM: + /* kmem.limit_in_bytes is deprecated. */ + ret = -EOPNOTSUPP; + break; case _TCP: ret = memcg_update_tcp_max(memcg, nr_pages); break; @@ -5082,6 +5086,12 @@ static struct cftype mem_cgroup_legacy_files[] = { }, #endif { + .name = "kmem.limit_in_bytes", + .private = MEMFILE_PRIVATE(_KMEM, RES_LIMIT), + .write = mem_cgroup_write, + .read_u64 = mem_cgroup_read_u64, + }, + { .name = "kmem.usage_in_bytes", .private = MEMFILE_PRIVATE(_KMEM, RES_USAGE), .read_u64 = mem_cgroup_read_u64, |