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Date: Sat, 24 Mar 2012 12:12:21 +0100
From: Richard Weinberger <richard@nod.at>
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To: Anton Vorontsov <anton.vorontsov@linaro.org>
Subject: Re: [PATCH 09/10] um: Properly check all process' threads for a live
 mm
References: <20120324102609.GA28356@lizard> <20120324103110.GI29067@lizard>
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Cc: Mike Frysinger <vapier@gentoo.org>, Peter Zijlstra <a.p.zijlstra@chello.nl>,
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 John Stultz <john.stultz@linaro.org>,
 KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
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Am 24.03.2012 11:31, schrieb Anton Vorontsov:
> kill_off_processes() might miss a valid process, this is because
> checking for process->mm is not enough. Process' main thread may
> exit or detach its mm via use_mm(), but other threads may still
> have a valid mm.
>=20
> To catch this we use find_lock_task_mm(), which walks up all
> threads and returns an appropriate task (with task lock held).
>=20
> Suggested-by: Oleg Nesterov <oleg@redhat.com>
> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>

Acked-by: Richard Weinberger <richard@nod.at>

Thanks,
//richard


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