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Date: Fri, 30 Sep 2011 00:46:41 -0700
From: Tejun Heo <htejun@gmail.com>
To: Michal Hocko <mhocko@suse.cz>
Cc: Oleg Nesterov <oleg@redhat.com>, David Rientjes <rientjes@google.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Konstantin Khlebnikov <khlebnikov@openvz.org>,
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        KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
        "Rafael J. Wysocki" <rjw@sisk.pl>,
        Rusty Russell <rusty@rustcorp.com.au>, linux-kernel@vger.kernel.org,
        linux-mm@kvack.org
Subject: Re: [patch] oom: thaw threads if oom killed thread is frozen before
 deferring
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Hello,

On Fri, Sep 30, 2011 at 09:41:25AM +0200, Michal Hocko wrote:
> > With pending freezer changes, allowing TIF_MEMDIE tasks to exit
> > freezer by modifying freezing() shouldn't be difficult, which should
> > be race-free and much simpler than diddling with thaw_task().  
> 
> Will the rework help with the initial problem of unkillable OOM selected
> frozen tasks or it will just help with other races that might be present
> with the patch? In other words will this work deprecate the 2 patches
> sent earlier in this thread?

I think it shouldn't be difficult to allow OOM-killing frozen tasks.
That should be good enough, right?

> > How urgent is this?  Can we wait for the next merge window?
> 
> Yes, I think we can wait some more.

I'm still processing rather large backlog.  I'll ping you back once I
sort out the pending freezer changes.

Thanks.

-- 
tejun