From: Andi Kleen <ak@suse.de>
To: "Ray Bryant" <raybry@mpdtxmail.amd.com>
Cc: "Dave McCracken" <dmccr@us.ibm.com>, "Robin Holt" <holt@sgi.com>,
"Hugh Dickins" <hugh@veritas.com>,
"Linux Kernel" <linux-kernel@vger.kernel.org>,
"Linux Memory Management" <linux-mm@kvack.org>
Subject: Re: [PATCH/RFC] Shared page tables
Date: Tue, 24 Jan 2006 01:39:46 +0100 [thread overview]
Message-ID: <200601240139.46751.ak@suse.de> (raw)
In-Reply-To: <200601231816.38942.raybry@mpdtxmail.amd.com>
On Tuesday 24 January 2006 01:16, Ray Bryant wrote:
> On Monday 23 January 2006 17:58, Ray Bryant wrote:
> <snip>
>
> > ... And what kind of alignment constraints do we end up
> > under in order to make the sharing happen? (My guess would be that there
> > aren't any such constraints (well, page alignment.. :-) if we are just
> > sharing pte's.)
> >
>
> Oh, obviously that is not right as you have to share full pte pages. So on
> x86_64 I'm guessing one needs 2MB alignment in order to get the sharing to
> kick in, since a pte page maps 512 pages of 4 KB each.
The new randomized mmaps will likely actively sabotate such alignment. I just
added them for x86-64.
-Andi
next prev parent reply other threads:[~2006-01-24 0:40 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-05 16:19 [PATCH/RFC] Shared page tables Dave McCracken
2006-01-07 12:25 ` Heiko Carstens
2006-01-07 18:09 ` Dave McCracken
2006-01-08 12:09 ` Heiko Carstens
2006-01-08 14:04 ` Dave McCracken
2006-01-13 5:15 ` Brian Twichell
2006-01-13 22:34 ` Ray Bryant
2006-01-17 4:50 ` Brian Twichell
2006-01-25 4:14 ` Brian Twichell
2006-01-13 15:18 ` Phillip Susi
2006-01-14 20:45 ` Brian Twichell
2006-01-17 23:53 ` Robin Holt
2006-01-18 0:17 ` Dave Hansen
2006-01-18 6:11 ` Dave McCracken
2006-01-18 1:27 ` Chen, Kenneth W
2006-01-18 3:32 ` Robin Holt
2006-01-23 23:58 ` Ray Bryant
2006-01-24 0:16 ` Ray Bryant
2006-01-24 0:39 ` Andi Kleen [this message]
2006-01-24 0:51 ` Dave McCracken
2006-01-24 1:11 ` Andi Kleen
2006-01-24 1:26 ` Dave McCracken
2006-01-24 0:53 ` Ray Bryant
2006-01-24 1:00 ` Dave McCracken
2006-01-24 1:10 ` Andi Kleen
2006-01-24 1:23 ` Benjamin LaHaise
2006-01-24 1:38 ` Andi Kleen
2006-01-24 7:08 ` Arjan van de Ven
2006-01-24 7:06 ` Arjan van de Ven
2006-01-24 7:18 ` Andi Kleen
2006-01-27 18:16 ` Martin Bligh
2006-02-01 9:49 ` Nick Piggin
2006-01-24 14:48 ` Dave McCracken
2006-01-24 14:56 ` Arjan van de Ven
2006-01-24 0:19 ` Dave McCracken
2006-01-24 0:46 ` Ray Bryant
2006-01-24 23:43 ` Ray Bryant
2006-01-24 23:50 ` Dave McCracken
2006-01-25 0:21 ` Ray Bryant
2006-01-25 22:48 ` Ray Bryant
2006-01-25 22:52 ` Dave McCracken
2006-01-26 0:16 ` Ray Bryant
2006-01-26 0:58 ` Ray Bryant
2006-01-26 4:06 ` Robin Holt
2006-01-20 21:24 ` Hugh Dickins
2006-01-20 21:54 ` Chen, Kenneth W
2006-01-23 17:39 ` Dave McCracken
2006-01-23 20:19 ` Benjamin LaHaise
2006-01-24 17:50 ` Hugh Dickins
2006-01-24 18:07 ` Dave McCracken
2006-01-24 18:20 ` Hugh Dickins
2006-01-27 22:50 ` Brian Twichell
2006-01-30 18:46 ` Ray Bryant
2006-01-31 18:47 ` Brian Twichell
2006-01-31 19:18 ` Dave McCracken
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