Re: [Bugme-new] [Bug 30432] New: rmdir on cgroup can cause hang tasks

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On Fri, 4 Mar 2011 17:28:15 +0900
KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> wrote:
This seems....
> ==
> static void mem_cgroup_start_move(struct mem_cgroup *mem)
> {
> .....
> 	put_online_cpus();
> 
>         synchronize_rcu();   <---------(*)
> }
> ==
> 

But this may scan LRU of memcg forever and SysRq+T just shows
above stack.

I'll check a tree before THP and force_empty again
-Kame

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