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From: "Pekka Enberg" <penberg@cs.helsinki.fi>
To: "Christoph Lameter" <clameter@sgi.com>
Cc: "Vegard Nossum" <vegard.nossum@gmail.com>,
	"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
	"Ingo Molnar" <mingo@elte.hu>, "Andi Kleen" <andi@firstfloor.org>,
	"Richard Knutsson" <ricknu-0@student.ltu.se>
Subject: Re: [PATCH 1/2] kmemcheck v3
Date: Fri, 8 Feb 2008 08:40:35 +0200	[thread overview]
Message-ID: <84144f020802072240o20ae7420x2e404e731a629c24@mail.gmail.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0802071530040.3845@schroedinger.engr.sgi.com>

On Feb 8, 2008 1:32 AM, Christoph Lameter <clameter@sgi.com> wrote:
> But the slab layer allocates pages < PAGE_SIZE. You need to take a fault
> right? So each object would need its own page?

No. We allocate a shadow page for each data page which we then use as
a per-byte "bitmap." For every tracked _page_ we take the page fault
always.

  reply	other threads:[~2008-02-08  6:40 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-07 21:36 Vegard Nossum
2008-02-07 21:39 ` [PATCH 2/2] " Vegard Nossum
2008-02-07 21:53 ` [PATCH 1/2] " Christoph Lameter
2008-02-07 22:12   ` Vegard Nossum
2008-02-07 22:53     ` Christoph Lameter
2008-02-07 23:18       ` Vegard Nossum
2008-02-07 23:32         ` Christoph Lameter
2008-02-08  6:40           ` Pekka Enberg [this message]
2008-02-08  8:09             ` Ingo Molnar
2008-02-08  6:30       ` Pekka Enberg
2008-02-08  6:33         ` Pekka Enberg
2008-02-08  7:10 ` Christoph Lameter
2008-02-08  7:48   ` Pekka Enberg
2008-02-08 11:55 ` Andi Kleen
2008-02-08 11:31   ` Pekka Enberg
2008-02-08 12:10     ` Andi Kleen
2008-02-08 11:39       ` Pekka Enberg
2008-02-08 11:37   ` Pekka Enberg
2008-02-08 12:15     ` Andi Kleen
2008-02-08 11:43       ` Pekka Enberg
2008-02-08 12:18   ` Vegard Nossum
2008-02-08 13:20     ` Andi Kleen
2008-02-08 12:59       ` Vegard Nossum
2008-02-08 13:48         ` Andi Kleen
2008-02-09  9:33           ` Ingo Molnar

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