Re: [rfc][patch 3/3] mm, memcg: introduce own oom handler to iterate only over its own threads

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To: Kamezawa Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Subject: Re: [rfc][patch 3/3] mm, memcg: introduce own oom handler to iterate only over its own threads
From: David Rientjes <rientjes@xxxxxxxxxx>
Date: Fri, 29 Jun 2012 13:30:33 -0700 (PDT)
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Michal Hocko <mhocko@xxxxxxx>, Johannes Weiner <hannes@xxxxxxxxxxx>, KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>, Minchan Kim <minchan@xxxxxxxxxx>, Oleg Nesterov <oleg@xxxxxxxxxx>, linux-mm@xxxxxxxxx, cgroups@xxxxxxxxxxxxxxx
In-reply-to: <4FEC1C06.70802@jp.fujitsu.com>
User-agent: Alpine 2.00 (DEB 1167 2008-08-23)

On Thu, 28 Jun 2012, Kamezawa Hiroyuki wrote:

> > It turns out that task->children is not an rcu-protected list so this
> > doesn't work.
> 
> Can't we use sighand->lock to iterate children ?
> 

I don't think so, this list is protected by tasklist_lock.  Oleg?
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Follow-Ups:
- Re: [rfc][patch 3/3] mm, memcg: introduce own oom handler to iterate only over its own threads
  - From: Oleg Nesterov

References:
- [patch 1/3] mm, oom: move declaration for mem_cgroup_out_of_memory to oom.h
  - From: David Rientjes
- [rfc][patch 3/3] mm, memcg: introduce own oom handler to iterate only over its own threads
  - From: David Rientjes
- Re: [rfc][patch 3/3] mm, memcg: introduce own oom handler to iterate only over its own threads
  - From: Kamezawa Hiroyuki
- Re: [rfc][patch 3/3] mm, memcg: introduce own oom handler to iterate only over its own threads
  - From: David Rientjes
- Re: [rfc][patch 3/3] mm, memcg: introduce own oom handler to iterate only over its own threads
  - From: David Rientjes
- Re: [rfc][patch 3/3] mm, memcg: introduce own oom handler to iterate only over its own threads
  - From: Kamezawa Hiroyuki

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