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| author | Tejun Heo <tj@kernel.org> | 2014-05-13 12:10:59 -0400 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2014-05-13 12:10:59 -0400 |
| commit | 0cee8b7786467907e12d1d8f872e6dc73bc95204 (patch) | |
| tree | ef6db71c2426ce12ed2f558790d0efe76bffd4a7 /tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/EventClass.py | |
| parent | f21a4f7594a122dcaabc08ce03bfb63fdc34de1b (diff) | |
cgroup: fix offlining child waiting in cgroup_subtree_control_write()
cgroup_subtree_control_write() waits for offline to complete
child-by-child before enabling a controller; however, it has a couple
bugs.
* It doesn't initialize the wait_queue_t. This can lead to infinite
hang on the following schedule() among other things.
* It forgets to pin the child before releasing cgroup_tree_mutex and
performing schedule(). The child may already be gone by the time it
wakes up and invokes finish_wait(). Pin the child being waited on.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
Diffstat (limited to 'tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/EventClass.py')
0 files changed, 0 insertions, 0 deletions