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| author | Tejun Heo <tj@kernel.org> | 2017-07-23 08:18:26 -0400 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2017-07-25 13:15:29 -0400 |
| commit | 918a8c2c4ea4fab8b7855b8da48bbaf0a733ebb0 (patch) | |
| tree | 55b740ec2319dc2a358e86a6b0323a6a71786a5c /Documentation/filesystems/caching | |
| parent | 7a0cf0e74ab6cfd8e561f5f12860d4ff8844905a (diff) | |
| download | op-kernel-dev-918a8c2c4ea4fab8b7855b8da48bbaf0a733ebb0.zip op-kernel-dev-918a8c2c4ea4fab8b7855b8da48bbaf0a733ebb0.tar.gz | |
cgroup: remove unnecessary empty check when enabling threaded mode
cgroup_enable_threaded() checks that the cgroup doesn't have any tasks
or children and fails the operation if so. This test is unnecessary
because the first part is already checked by
cgroup_can_be_thread_root() and the latter is unnecessary. The latter
actually cause a behavioral oddity. Please consider the following
hierarchy. All cgroups are domains.
A
/ \
B C
\
D
If B is made threaded, C and D becomes invalid domains. Due to the no
children restriction, threaded mode can't be enabled on C. For C and
D, the only thing the user can do is removal.
There is no reason for this restriction. Remove it.
Acked-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'Documentation/filesystems/caching')
0 files changed, 0 insertions, 0 deletions
