From: Christoph Lameter <cl@linux.com>
To: Pravin B Shelar <pshelar@nicira.com>
Cc: penberg@kernel.org, mpm@selenic.com,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
jesse@nicira.com, abhide@nicira.com
Subject: Re: [PATCH 1/2] mm: Fix slab->page flags corruption.
Date: Mon, 14 May 2012 13:53:27 -0500 (CDT) [thread overview]
Message-ID: <alpine.DEB.2.00.1205141352440.26304@router.home> (raw)
In-Reply-To: <1337020877-20087-1-git-send-email-pshelar@nicira.com>
On Mon, 14 May 2012, Pravin B Shelar wrote:
> Transparent huge pages can change page->flags (PG_compound_lock)
> without taking Slab lock. Since THP can not break slab pages we can
> safely access compound page without taking compound lock.
>
> Specificly this patch fixes race between compound_unlock and slab
> functions which does page-flags update. This can occur when
> get_page/put_page is called on page from slab object.
You need to also get this revbiewed by the THP folks like Andrea &
friends.
Reviewed-by: Christoph Lameter <cl@linux.com>
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next prev parent reply other threads:[~2012-05-14 18:53 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-14 18:41 Pravin B Shelar
2012-05-14 18:53 ` Christoph Lameter [this message]
2012-05-16 18:40 ` Pravin Shelar
2012-05-17 0:44 ` Andrea Arcangeli
2012-05-17 21:25 ` Pravin Shelar
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