Re: [PATCH] Use MPOL_INTERLEAVE for tmpfs files

From: Brent Casavant <bcasavan@sgi.com>
To: Hugh Dickins <hugh@veritas.com>
Cc: "Martin J. Bligh" <mbligh@aracnet.com>, Andi Kleen <ak@suse.de>,
	"Adam J. Richter" <adam@yggdrasil.com>,
	colpatch@us.ibm.com, linux-kernel@vger.kernel.org,
	linux-mm@kvack.org
Subject: Re: [PATCH] Use MPOL_INTERLEAVE for tmpfs files
Date: Mon, 15 Nov 2004 16:07:29 -0600	[thread overview]
Message-ID: <Pine.SGI.4.58.0411151604580.20302@kzerza.americas.sgi.com> (raw)
In-Reply-To: <Pine.LNX.4.44.0411111929370.2939-300000@localhost.localdomain>

On Thu, 11 Nov 2004, Hugh Dickins wrote:

> The first (against 2.6.10-rc1-mm5) being my reversion of NULL sbinfo
> in shmem.c, to make it easier for others to add things into sbinfo
> without having to worry about NULL cases.  So that goes back to
> allocating an sbinfo even for the internal mount: I've rounded up to
> L1_CACHE_BYTES to avoid false sharing, but even so, please test it out
> on your 512-way to make sure I haven't screwed up the scalability we
> got before - thanks.  If you find it okay, I'll send to akpm soonish.

OK, tried it at 508P (the last 4P had a hardware problem).  The
performance results are all in line with what we'd accomplished
with NULL sbinfo, so the patch is good by me.

Brent

-- 
Brent Casavant                          If you had nothing to fear,
bcasavan@sgi.com                        how then could you be brave?
Silicon Graphics, Inc.                    -- Queen Dama, Source Wars