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| author | Tejun Heo <tj@kernel.org> | 2019-05-31 10:38:57 -0700 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2019-05-31 10:38:57 -0700 |
| commit | 6b115bf58e6f013ca75e7115aabcbd56c20ff31d (patch) | |
| tree | 965ef5bcab73bbeacdfe1fbed8408300d2ecbcea /kernel | |
| parent | 8cfeb385e9ebda784dccd447fe0f784464ca6ee1 (diff) | |
| download | linux-6b115bf58e6f013ca75e7115aabcbd56c20ff31d.tar.gz linux-6b115bf58e6f013ca75e7115aabcbd56c20ff31d.tar.bz2 linux-6b115bf58e6f013ca75e7115aabcbd56c20ff31d.zip | |
cgroup: Call cgroup_release() before __exit_signal()
cgroup_release() calls cgroup_subsys->release() which is used by the
pids controller to uncharge its pid. We want to use it to manage
iteration of dying tasks which requires putting it before
__unhash_process(). Move cgroup_release() above __exit_signal().
While this makes it uncharge before the pid is freed, pid is RCU freed
anyway and the window is very narrow.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/exit.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/exit.c b/kernel/exit.c index 1803efb2922f..a75b6a7f458a 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -195,6 +195,7 @@ repeat: rcu_read_unlock(); proc_flush_task(p); + cgroup_release(p); write_lock_irq(&tasklist_lock); ptrace_release_task(p); @@ -220,7 +221,6 @@ repeat: } write_unlock_irq(&tasklist_lock); - cgroup_release(p); release_thread(p); call_rcu(&p->rcu, delayed_put_task_struct); |