linux-kernel - Re: [PATCH 7/9] um: Should hold tasklist

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Message-ID: <20120423154027.GA23066@lizard>
Date:	Mon, 23 Apr 2012 08:40:27 -0700
From:	Anton Vorontsov <anton.vorontsov@...aro.org>
To:	Richard Weinberger <richard@....at>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Russell King <linux@....linux.org.uk>,
	Mike Frysinger <vapier@...too.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mundt <lethal@...ux-sh.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	John Stultz <john.stultz@...aro.org>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	uclinux-dist-devel@...ckfin.uclinux.org,
	linuxppc-dev@...ts.ozlabs.org, linux-sh@...r.kernel.org,
	user-mode-linux-devel@...ts.sourceforge.net,
	linaro-kernel@...ts.linaro.org, patches@...aro.org,
	linux-mm@...ck.org
Subject: Re: [PATCH 7/9] um: Should hold tasklist_lock while traversing
 processes

On Mon, Apr 23, 2012 at 04:57:54PM +0200, Richard Weinberger wrote:
> On 23.04.2012 09:09, Anton Vorontsov wrote:
> >Traversing the tasks requires holding tasklist_lock, otherwise it
> >is unsafe.
> >
> >p.s. However, I'm not sure that calling os_kill_ptraced_process()
> >in the atomic context is correct. It seem to work, but please
> >take a closer look.
> >
> >Signed-off-by: Anton Vorontsov<anton.vorontsov@...aro.org>
> >---
> 
> You forgot my Ack and I've already explained why
> os_kill_ptraced_process() is fine.

Ouch, sorry!

-- 
Anton Vorontsov
Email: cbouatmailru@...il.com
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