]> git.baikalelectronics.ru Git - kernel.git/commit
cgroup: fix cgroup_add_cftypes() error handling
authorTejun Heo <tj@kernel.org>
Fri, 28 Jun 2013 23:24:11 +0000 (16:24 -0700)
committerTejun Heo <tj@kernel.org>
Fri, 12 Jul 2013 19:34:01 +0000 (12:34 -0700)
commit1134ce6b42fc5d062d3d89e8b3419e15e6f58422
tree8bab4d142410db148b2a7cbb4029d3b8eb1ab29a
parent96f54b963adc2e8568235e4344af7e3ce7cdfa64
cgroup: fix cgroup_add_cftypes() error handling

cgroup_add_cftypes() uses cgroup_cfts_commit() to actually create the
files; however, both functions ignore actual file creation errors and
just assume success.  This can lead to, for example, blkio hierarchy
with some of the cgroups with only subset of interface files populated
after cfq-iosched is loaded under heavy memory pressure, which is
nasty.

This patch updates cgroup_cfts_commit() and cgroup_add_cftypes() to
guarantee that all files are created on success and no file is created
on failure.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
kernel/cgroup.c