From: Andi Kleen <ak@suse.de>
To: Christoph Lameter <clameter@sgi.com>
Cc: Andi Kleen <ak@suse.de>, Mel Gorman <mel@skynet.ie>,
Lee.Schermerhorn@hp.com, linux-kernel@vger.kernel.org,
linux-mm@kvack.org
Subject: Re: [PATCH 3/4] Embed zone_id information within the zonelist->zones pointer
Date: Tue, 14 Aug 2007 02:26:35 +0200 [thread overview]
Message-ID: <20070814002635.GR3406@bingen.suse.de> (raw)
In-Reply-To: <Pine.LNX.4.64.0708131625320.19910@schroedinger.engr.sgi.com>
On Mon, Aug 13, 2007 at 04:27:42PM -0700, Christoph Lameter wrote:
> On Tue, 14 Aug 2007, Andi Kleen wrote:
>
> > > Ok then lets do it.
> >
> > Conversion only makes sense once an API with a explicit mask
> > is in. Otherwise we have muddled semantics again.
>
> pci_set_consistent_dma_mask
>
> has that.
While on x86 it is roughly identical (although the low level
allocator is currently not very reliable) it makes a significant
difference on some platforms. e.g. I was told on PA-RISC
consistent memory is much more costly than non consistent ones.
That's probably true on anything that's not full IO cache
consistent.
So while it would be reasonable semantics for x86 and IA64
it's not for everybody else.
-Andi
>
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next prev parent reply other threads:[~2007-08-14 0:26 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-09 21:06 [PATCH 0/4] Use one zonelist per node instead of multiple zonelists v3 Mel Gorman
2007-08-09 21:06 ` [PATCH 1/4] Use zonelists instead of zones when direct reclaiming pages Mel Gorman
2007-08-09 21:19 ` Christoph Lameter
2007-08-09 21:06 ` [PATCH 2/4] Use one zonelist that is filtered instead of multiple zonelists Mel Gorman
2007-08-09 21:27 ` Christoph Lameter
2007-08-09 21:07 ` [PATCH 3/4] Embed zone_id information within the zonelist->zones pointer Mel Gorman
2007-08-09 21:37 ` Christoph Lameter
2007-08-09 23:33 ` Mel Gorman
2007-08-10 1:44 ` Christoph Lameter
2007-08-10 10:47 ` Mel Gorman
2007-08-10 17:37 ` Christoph Lameter
2007-08-10 18:13 ` Andi Kleen
2007-08-10 19:02 ` Christoph Lameter
2007-08-11 1:04 ` Andi Kleen
2007-08-13 21:25 ` Christoph Lameter
2007-08-13 22:50 ` Andi Kleen
2007-08-13 22:00 ` Christoph Lameter
2007-08-13 22:58 ` Andi Kleen
2007-08-13 22:09 ` Christoph Lameter
2007-08-13 23:08 ` Andi Kleen
2007-08-13 22:22 ` Christoph Lameter
2007-08-13 23:42 ` Andi Kleen
2007-08-13 22:52 ` Christoph Lameter
2007-08-13 23:55 ` Andi Kleen
2007-08-13 23:12 ` Christoph Lameter
2007-08-14 0:16 ` Andi Kleen
2007-08-13 23:25 ` Christoph Lameter
2007-08-14 0:25 ` Andi Kleen
2007-08-13 22:38 ` Christoph Lameter
2007-08-13 23:43 ` Andi Kleen
2007-08-13 22:54 ` Christoph Lameter
2007-08-14 0:00 ` Andi Kleen
2007-08-13 23:16 ` Christoph Lameter
2007-08-14 0:16 ` Andi Kleen
2007-08-13 23:27 ` Christoph Lameter
2007-08-14 0:26 ` Andi Kleen [this message]
2007-08-14 19:56 ` Christoph Lameter
2007-08-13 23:22 ` Alan Cox
2007-08-14 0:14 ` Andi Kleen
2007-08-13 23:44 ` Alan Cox
2007-08-14 19:11 ` Andy Isaacson
2007-08-14 20:23 ` Andi Kleen
2007-08-14 19:43 ` Andy Isaacson
2007-08-14 21:05 ` Andi Kleen
2007-08-15 11:37 ` Ralf Baechle
2007-08-15 12:59 ` Andi Kleen
2007-08-15 12:32 ` Ralf Baechle
2007-08-15 19:59 ` Christoph Lameter
2007-08-09 21:07 ` [PATCH 4/4] Apply MPOL_BIND policy to two highest zones when highest is ZONE_MOVABLE Mel Gorman
2007-08-09 21:37 ` Christoph Lameter
2007-08-09 21:19 ` [PATCH 0/4] Use one zonelist per node instead of multiple zonelists v3 Christoph Lameter
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