https://github.com/torvalds/linux
Revision 7e97de0b033bcac4fa9a35cef72e0c06e6a22c67 authored by Kirill Tkhai on 02 August 2018, 22:36:01 UTC, committed by Linus Torvalds on 02 August 2018, 23:03:40 UTC
In case of memcg_online_kmem() failure, memcg_cgroup::id remains hashed
in mem_cgroup_idr even after memcg memory is freed. This leads to leak
of ID in mem_cgroup_idr.
This patch adds removal into mem_cgroup_css_alloc(), which fixes the
problem. For better readability, it adds a generic helper which is used
in mem_cgroup_alloc() and mem_cgroup_id_put_many() as well.
Link: http://lkml.kernel.org/r/152354470916.22460.14397070748001974638.stgit@localhost.localdomain
Fixes 73f576c04b94 ("mm: memcontrol: fix cgroup creation failure after many small jobs")
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: Michal Hocko <mhocko@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent e30cb13
Tip revision: 7e97de0b033bcac4fa9a35cef72e0c06e6a22c67 authored by Kirill Tkhai on 02 August 2018, 22:36:01 UTC
memcg: remove memcg_cgroup::id from IDR on mem_cgroup_css_alloc() failure
memcg: remove memcg_cgroup::id from IDR on mem_cgroup_css_alloc() failure
Tip revision: 7e97de0
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| .clang-format | -rw-r--r-- | 12.8 KB |
| .cocciconfig | -rw-r--r-- | 59 bytes |
| .get_maintainer.ignore | -rw-r--r-- | 31 bytes |
| .gitattributes | -rw-r--r-- | 30 bytes |
| .gitignore | -rw-r--r-- | 1.5 KB |
| .mailmap | -rw-r--r-- | 9.3 KB |
| COPYING | -rw-r--r-- | 423 bytes |
| CREDITS | -rw-r--r-- | 96.3 KB |
| Kbuild | -rw-r--r-- | 2.2 KB |
| Kconfig | -rw-r--r-- | 321 bytes |
| MAINTAINERS | -rw-r--r-- | 449.5 KB |
| Makefile | -rw-r--r-- | 58.2 KB |
| README | -rw-r--r-- | 800 bytes |
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