linux-kernel - Re: + freezer-check-oom-kill-while-being-frozen.patch added to -mm tree

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Message-ID: <20141016203954.GA26336@redhat.com>
Date:	Thu, 16 Oct 2014 22:39:54 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Cong Wang <xiyou.wangcong@...il.com>,
	Michal Hocko <mhocko@...e.cz>,
	David Rientjes <rientjes@...gle.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>, Tejun Heo <tj@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: + freezer-check-oom-kill-while-being-frozen.patch added to -mm
	tree

> Fix the issue by checking for TIF_MEMDIE thread flag and get away from the
> fridge if it is set.  oom_scan_process_thread doesn't have to check for
> the frozen task anymore because do_send_sig_info will wake up the thread
> and TIF_MEMDIE is already set by that time.

I must have missed something... but __refrigerator() sleeps in
TASK_UNINTERRUPTIBLE and do_send_sig_info() won't wake it up?

Oleg.

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