On 2013/11/4 21:43, Markus Blank-Burian wrote: >> synchronize_rcu() is a block operation and can keep us waiting for >> a long period, so instead it's possible that usage never goes down >> to 0 and we are in a dead loop. > > Ok, I didn't think of that. Tracing shows that the function keeps > looping. The last lines repeat indefinitely. > ... > kworker/3:5-7605 [003] .... 987.475678: > mem_cgroup_reparent_charges: usage: 1568768 > kworker/3:5-7605 [003] .... 987.478677: > mem_cgroup_reparent_charges: usage: 1568768 > kworker/3:5-7605 [003] .... 987.481675: > mem_cgroup_reparent_charges: usage: 1568768 So it's much more likely this is a memcg bug rather than a cgroup bug. I hope memcg guys could look into it, or you could do a git-bisect if you can reliably reproduce the bug. -- To unsubscribe from this list: send the line "unsubscribe cgroups" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
