Commit 2c323017 authored by Josef Bacik's avatar Josef Bacik Committed by Jens Axboe

blk-cgroup: clear the throttle queue on fork

We were hitting a panic in production where we put too many times on the
request queue.  This is because we'd get the throttle_queue of the
parent if we fork()'ed while we needed to be throttled, but we didn't
have a reference on it.  Instead just clear these flags on fork so the
child doesn't pay for the sins of its father.
Signed-off-by: default avatarJosef Bacik <josef@toxicpanda.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent cc7ecc25
...@@ -843,6 +843,11 @@ static struct task_struct *dup_task_struct(struct task_struct *orig, int node) ...@@ -843,6 +843,11 @@ static struct task_struct *dup_task_struct(struct task_struct *orig, int node)
tsk->fail_nth = 0; tsk->fail_nth = 0;
#endif #endif
#ifdef CONFIG_BLK_CGROUP
tsk->throttle_queue = NULL;
tsk->use_memdelay = 0;
#endif
return tsk; return tsk;
free_stack: free_stack:
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment