From: Tejun Heo <tj@kernel.org>
To: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Thomas Gleixner <tglx@linutronix.de>,
LKML <linux-kernel@vger.kernel.org>,
linux-mm@kvack.org, Christoph Lameter <cl@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
Mel Gorman <mel@csn.ul.ie>
Subject: Re: mm: Do not iterate over NR_CPUS in __zone_pcp_update()
Date: Tue, 09 Mar 2010 11:06:15 +0900 [thread overview]
Message-ID: <4B95AD17.2030106@kernel.org> (raw)
In-Reply-To: <84144f021003080529w1b20c08dmf6871bd46381bc71@mail.gmail.com>
On 03/08/2010 10:29 PM, Pekka Enberg wrote:
> On Mon, Mar 8, 2010 at 11:21 AM, Thomas Gleixner <tglx@linutronix.de> wrote:
>> __zone_pcp_update() iterates over NR_CPUS instead of limiting the
>> access to the possible cpus. This might result in access to
>> uninitialized areas as the per cpu allocator only populates the per
>> cpu memory for possible cpus.
>>
>> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
>
> Looks OK to me.
>
> Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Yeap, that's buggy.
Acked-by: Tejun Heo <tj@kernel.org>
I suppose this would go through the mm tree?
Thanks.
--
tejun
WARNING: multiple messages have this Message-ID (diff)
From: Tejun Heo <tj@kernel.org>
To: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Thomas Gleixner <tglx@linutronix.de>,
LKML <linux-kernel@vger.kernel.org>,
linux-mm@kvack.org, Christoph Lameter <cl@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
Mel Gorman <mel@csn.ul.ie>
Subject: Re: mm: Do not iterate over NR_CPUS in __zone_pcp_update()
Date: Tue, 09 Mar 2010 11:06:15 +0900 [thread overview]
Message-ID: <4B95AD17.2030106@kernel.org> (raw)
In-Reply-To: <84144f021003080529w1b20c08dmf6871bd46381bc71@mail.gmail.com>
On 03/08/2010 10:29 PM, Pekka Enberg wrote:
> On Mon, Mar 8, 2010 at 11:21 AM, Thomas Gleixner <tglx@linutronix.de> wrote:
>> __zone_pcp_update() iterates over NR_CPUS instead of limiting the
>> access to the possible cpus. This might result in access to
>> uninitialized areas as the per cpu allocator only populates the per
>> cpu memory for possible cpus.
>>
>> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
>
> Looks OK to me.
>
> Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Yeap, that's buggy.
Acked-by: Tejun Heo <tj@kernel.org>
I suppose this would go through the mm tree?
Thanks.
--
tejun
--
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next prev parent reply other threads:[~2010-03-09 2:07 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-08 9:21 mm: Do not iterate over NR_CPUS in __zone_pcp_update() Thomas Gleixner
2010-03-08 9:21 ` Thomas Gleixner
2010-03-08 13:29 ` Pekka Enberg
2010-03-08 13:29 ` Pekka Enberg
2010-03-09 2:06 ` Tejun Heo [this message]
2010-03-09 2:06 ` Tejun Heo
2010-03-09 15:10 ` Christoph Lameter
2010-03-09 15:10 ` Christoph Lameter
2010-03-09 20:04 ` Pekka Enberg
2010-03-09 20:04 ` Pekka Enberg
2010-03-09 20:19 ` Andrew Morton
2010-03-09 20:19 ` Andrew Morton
2010-03-08 15:59 ` Christoph Lameter
2010-03-08 15:59 ` Christoph Lameter
2010-03-08 16:09 ` Mel Gorman
2010-03-08 16:09 ` Mel Gorman
2010-03-09 6:34 ` KOSAKI Motohiro
2010-03-09 6:34 ` KOSAKI Motohiro
2010-03-09 20:22 ` Andrew Morton
2010-03-09 20:22 ` Andrew Morton
2010-03-09 20:33 ` Christoph Lameter
2010-03-09 20:33 ` Christoph Lameter
2010-03-09 20:33 ` Robert P. J. Day
2010-03-09 20:33 ` Robert P. J. Day
2010-03-09 20:55 ` Christoph Lameter
2010-03-09 20:55 ` Christoph Lameter
2010-03-09 21:02 ` Robert P. J. Day
2010-03-09 21:02 ` Robert P. J. Day
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