linux-kernel - Re: [PATCH] oom: Make coredump interruptible

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Message-Id: <20100614002655.35D9E408C1@magilla.sf.frob.com>
Date:	Sun, 13 Jun 2010 17:26:55 -0700 (PDT)
From:	Roland McGrath <roland@...hat.com>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>,
	David Rientjes <rientjes@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Nick Piggin <npiggin@...e.de>
Subject: Re: [PATCH] oom: Make coredump interruptible

> Oh. This needs more thinking. Definitely the task sleeping in exit_mm()
> must not exit until core_state->dumper->thread returns from do_coredump().
> If nothing else, the dumper can use its task_struct and it relies on
> the stable core_thread->next list. And right now TASK_KILLABLE can't
> work anyway, it is possible that fatal_signal_pending() is true.

Yes, I was right to say this should be another thread.  Let's not get into
all this right now.  I think it is mostly orthogonal to the oom_kill issue.


Thanks,
Roland
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