From: Minchan Kim <minchan.kim@gmail.com>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: TAO HU <tghk48@motorola.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
"Ye Yuan.Bo-A22116" <yuan-bo.ye@motorola.com>,
Chang Qing-A21550 <Qing.Chang@motorola.com>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [Question] race condition in mm/page_alloc.c regarding page->lru?
Date: Fri, 2 Apr 2010 14:15:56 +0900 [thread overview]
Message-ID: <z2x28c262361004012215h2b2ea3dbu5260724f97f55b95@mail.gmail.com> (raw)
In-Reply-To: <20100402140406.d3d7f18e.kamezawa.hiroyu@jp.fujitsu.com>
On Fri, Apr 2, 2010 at 2:04 PM, KAMEZAWA Hiroyuki
<kamezawa.hiroyu@jp.fujitsu.com> wrote:
> On Fri, 2 Apr 2010 11:51:33 +0800
> TAO HU <tghk48@motorola.com> wrote:
>
>> 2 patches related to page_alloc.c were applied.
>> Does anyone see a connection between the 2 patches and the panic?
>> NOTE: the full patches are attached.
>>
>
> I don't think there are relationship between patches and your panic.
>
> BTW, there is other case about the backlog rather than race in alloc_pages()
> itself. If someone list_del(&page->lru) and the page is already freed,
> you'll see the same backlog later.
> Then, I doubt use-after-free case rather than complicated races.
It does make sense.
Please, grep "page handling" by out-of-mainline code.
If you found out, Please, post it.
--
Kind regards,
Minchan Kim
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next prev parent reply other threads:[~2010-04-02 5:15 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-01 4:05 [Question] race condition in mm/page_alloc.c regarding page->lru? TAO HU
2010-04-02 3:51 ` TAO HU
2010-04-02 5:03 ` KOSAKI Motohiro
2010-04-02 5:19 ` TAO HU
2010-04-02 9:48 ` Mel Gorman
2010-04-03 0:59 ` Arve Hjønnevåg
2010-04-04 22:45 ` KOSAKI Motohiro
2010-04-05 10:14 ` Mel Gorman
2010-04-05 10:49 ` Minchan Kim
2010-04-06 3:09 ` [PATCH] mm: Check if any page in a pageblock is reserved before marking it MIGRATE_RESERVE Arve Hjønnevåg
2010-04-06 4:15 ` Minchan Kim
2010-04-06 15:11 ` Mel Gorman
2010-04-02 5:04 ` [Question] race condition in mm/page_alloc.c regarding page->lru? KAMEZAWA Hiroyuki
2010-04-02 5:15 ` Minchan Kim [this message]
2010-04-02 7:00 ` TAO HU
2010-04-02 7:22 ` Minchan Kim
2010-04-02 5:13 ` Minchan Kim
2010-04-02 6:48 ` TAO HU
2010-04-02 7:06 ` Daniel Mack
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