diff options
| author | Dietmar Eggemann <dietmar.eggemann@arm.com> | 2023-08-20 16:21:44 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-08-30 16:23:18 +0200 |
| commit | 2d69f68ad409a4945d1c5998e537082abf89096c (patch) | |
| tree | b957549a999dc9eeba3715850a39758c20a9c33f /lib/string_helpers.c | |
| parent | 4603c2a104bc8c9371e94b2a278a17006b061a28 (diff) | |
cgroup/cpuset: Free DL BW in case can_attach() fails
commit 2ef269ef1ac006acf974793d975539244d77b28f upstream.
cpuset_can_attach() can fail. Postpone DL BW allocation until all tasks
have been checked. DL BW is not allocated per-task but as a sum over
all DL tasks migrating.
If multiple controllers are attached to the cgroup next to the cpuset
controller a non-cpuset can_attach() can fail. In this case free DL BW
in cpuset_cancel_attach().
Finally, update cpuset DL task count (nr_deadline_tasks) only in
cpuset_attach().
Suggested-by: Waiman Long <longman@redhat.com>
Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Signed-off-by: Juri Lelli <juri.lelli@redhat.com>
Reviewed-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
[ Fix conflicts in kernel/cgroup/cpuset.c due to new code being applied
that is not applicable on this branch. Reject new code. ]
Signed-off-by: Qais Yousef (Google) <qyousef@layalina.io>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'lib/string_helpers.c')
0 files changed, 0 insertions, 0 deletions