linux-kernel - Re: [PATCH] vm_is_stack: use for_each_thread() rather then buggy while_each

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Message-ID: <alpine.DEB.2.02.1408090159070.11855@chino.kir.corp.google.com>
Date:	Sat, 9 Aug 2014 01:59:25 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Oleg Nesterov <oleg@...hat.com>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Aleksei Besogonov <alex.besogonov@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] vm_is_stack: use for_each_thread() rather then buggy
 while_each_thread()

On Thu, 7 Aug 2014, Oleg Nesterov wrote:

> Aleksei hit the soft lockup during reading /proc/PID/smaps.
> David investigated the problem and suggested the right fix.
> 
> while_each_thread() is racy and should die, this patch updates
> vm_is_stack().
> 
> Reported-and-tested-by: Aleksei Besogonov <alex.besogonov@...il.com>
> Suggested-by: David Rientjes <rientjes@...gle.com>
> Signed-off-by: Oleg Nesterov <oleg@...hat.com>

Acked-by: David Rientjes <rientjes@...gle.com>

> Cc: stable@...r.kernel.org

3.4+
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