From: Eric Dumazet <eric.dumazet@gmail.com>
To: Pravin B Shelar <pshelar@nicira.com>
Cc: cl@linux.com, penberg@kernel.org, mpm@selenic.com,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
jesse@nicira.com, abhide@nicira.com
Subject: Re: [PATCH] mm: sl[auo]b: Use atomic bit operations to update page-flags.
Date: Tue, 08 May 2012 21:11:16 +0200 [thread overview]
Message-ID: <1336504276.3752.2600.camel@edumazet-glaptop> (raw)
In-Reply-To: <1336503339-18722-1-git-send-email-pshelar@nicira.com>
On Tue, 2012-05-08 at 11:55 -0700, Pravin B Shelar wrote:
> Transparent huge pages can change page->flags (PG_compound_lock)
> without taking Slab lock. So sl[auo]b need to use atomic bit
> operation while changing page->flags.
> 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.
But should get_page()/put_page() be called on a page own by slub ?
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next prev parent reply other threads:[~2012-05-08 19:11 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-08 18:55 Pravin B Shelar
2012-05-08 19:11 ` Eric Dumazet [this message]
2012-05-08 19:22 ` Christoph Lameter
2012-05-09 16:41 ` Pravin Shelar
2012-05-09 17:25 ` Christoph Lameter
2012-05-09 18:34 ` Pravin Shelar
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