From: Andi Kleen <ak@suse.de>
To: Ingo Molnar <mingo@elte.hu>
Cc: Paul Jackson <pj@sgi.com>,
akpm@osdl.org, dgc@sgi.com, steiner@sgi.com, Simon.Derr@bull.net,
linux-kernel@vger.kernel.org, clameter@sgi.com
Subject: Re: [PATCH 1/5] cpuset memory spread basic implementation
Date: Mon, 6 Feb 2006 11:16:42 +0100 [thread overview]
Message-ID: <200602061116.44040.ak@suse.de> (raw)
In-Reply-To: <20060206101156.GA1761@elte.hu>
On Monday 06 February 2006 11:11, Ingo Molnar wrote:
>
> * Andi Kleen <ak@suse.de> wrote:
>
> > Of course there might be some corner cases where using local memory
> > for caching is still better (like mmap file IO), but my guess is that
> > it isn't a good default.
>
> /tmp is almost certainly one where local memory is better.
Not sure. What happens if someone writes a 1GB /tmp file on a 1GB node?
Christoph recently added some changes to the page allocator to
try harder to get local memory to work around this problem, but
attacking it at the root might be better.
Perhaps one could do a "near" caching policy for big machines: e.g.
if on a big Altix prefer to put it on a not too far away node, but
spread it out evenly. But it's not clear yet such complexity is needed.
-Andi
next prev parent reply other threads:[~2006-02-06 10:16 UTC|newest]
Thread overview: 102+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-04 7:19 [PATCH 1/5] cpuset memory spread basic implementation Paul Jackson
2006-02-04 7:19 ` [PATCH 2/5] cpuset memory spread page cache implementation and hooks Paul Jackson
2006-02-04 23:49 ` Andrew Morton
2006-02-05 1:42 ` Paul Jackson
2006-02-05 1:54 ` Andrew Morton
2006-02-05 3:28 ` Christoph Lameter
2006-02-05 5:06 ` Andrew Morton
2006-02-05 6:08 ` Paul Jackson
2006-02-05 6:15 ` Andrew Morton
2006-02-05 6:28 ` Paul Jackson
2006-02-06 0:20 ` Paul Jackson
2006-02-06 5:51 ` Paul Jackson
2006-02-06 7:14 ` Pekka J Enberg
2006-02-06 7:42 ` Pekka J Enberg
2006-02-06 7:51 ` Pekka J Enberg
2006-02-06 17:32 ` Pekka Enberg
2006-02-04 7:19 ` [PATCH 3/5] cpuset memory spread slab cache implementation Paul Jackson
2006-02-04 23:49 ` Andrew Morton
2006-02-05 3:37 ` Christoph Lameter
2006-02-04 7:19 ` [PATCH 4/5] cpuset memory spread slab cache optimizations Paul Jackson
2006-02-04 23:50 ` Andrew Morton
2006-02-05 3:18 ` Paul Jackson
2006-02-04 23:50 ` Andrew Morton
2006-02-05 4:10 ` Paul Jackson
2006-02-04 7:19 ` [PATCH 5/5] cpuset memory spread slab cache hooks Paul Jackson
2006-02-06 4:37 ` Andrew Morton
2006-02-04 23:49 ` [PATCH 1/5] cpuset memory spread basic implementation Andrew Morton
2006-02-05 3:35 ` Christoph Lameter
2006-02-06 4:33 ` Andrew Morton
2006-02-06 5:50 ` Paul Jackson
2006-02-06 6:02 ` Andrew Morton
2006-02-06 6:17 ` Ingo Molnar
2006-02-06 7:22 ` Paul Jackson
2006-02-06 7:43 ` Ingo Molnar
2006-02-06 8:19 ` Paul Jackson
2006-02-06 8:22 ` Ingo Molnar
2006-02-06 8:40 ` Ingo Molnar
2006-02-06 9:03 ` Paul Jackson
2006-02-06 9:09 ` Ingo Molnar
2006-02-06 9:27 ` Paul Jackson
2006-02-06 9:37 ` Ingo Molnar
2006-02-06 20:22 ` Paul Jackson
2006-02-06 8:47 ` Paul Jackson
2006-02-06 8:51 ` Ingo Molnar
2006-02-06 9:09 ` Paul Jackson
2006-02-06 10:09 ` Andi Kleen
2006-02-06 10:11 ` Ingo Molnar
2006-02-06 10:16 ` Andi Kleen [this message]
2006-02-06 10:23 ` Ingo Molnar
2006-02-06 10:35 ` Andi Kleen
2006-02-06 14:42 ` Paul Jackson
2006-02-06 14:35 ` Paul Jackson
2006-02-06 16:48 ` Christoph Lameter
2006-02-06 17:11 ` Andi Kleen
2006-02-06 18:21 ` Christoph Lameter
2006-02-06 18:36 ` Andi Kleen
2006-02-06 18:43 ` Christoph Lameter
2006-02-06 18:48 ` Andi Kleen
2006-02-06 19:19 ` Christoph Lameter
2006-02-06 20:27 ` Paul Jackson
2006-02-06 18:43 ` Ingo Molnar
2006-02-06 20:01 ` Paul Jackson
2006-02-06 20:05 ` Ingo Molnar
2006-02-06 20:27 ` Christoph Lameter
2006-02-06 20:41 ` Ingo Molnar
2006-02-06 20:49 ` Christoph Lameter
2006-02-06 21:07 ` Ingo Molnar
2006-02-06 22:10 ` Christoph Lameter
2006-02-06 23:29 ` Ingo Molnar
2006-02-06 23:45 ` Paul Jackson
2006-02-07 0:19 ` Ingo Molnar
2006-02-07 1:17 ` David Chinner
2006-02-07 9:31 ` Andi Kleen
2006-02-07 11:53 ` Ingo Molnar
2006-02-07 12:14 ` Andi Kleen
2006-02-07 12:30 ` Ingo Molnar
2006-02-07 12:43 ` Andi Kleen
2006-02-07 12:58 ` Ingo Molnar
2006-02-07 13:14 ` Andi Kleen
2006-02-07 14:11 ` Ingo Molnar
2006-02-07 14:23 ` Andi Kleen
2006-02-07 17:11 ` Christoph Lameter
2006-02-07 17:29 ` Andi Kleen
2006-02-07 17:39 ` Christoph Lameter
2006-02-07 17:10 ` Christoph Lameter
2006-02-07 17:28 ` Andi Kleen
2006-02-07 17:42 ` Christoph Lameter
2006-02-07 17:51 ` Andi Kleen
2006-02-07 17:06 ` Christoph Lameter
2006-02-07 17:26 ` Andi Kleen
2006-02-04 23:50 ` Andrew Morton
2006-02-04 23:57 ` David S. Miller
2006-02-06 4:37 ` Andrew Morton
2006-02-06 6:02 ` Ingo Molnar
2006-02-06 6:56 ` Paul Jackson
2006-02-06 7:08 ` Andrew Morton
2006-02-06 7:39 ` Ingo Molnar
2006-02-06 8:22 ` Paul Jackson
2006-02-06 8:35 ` Paul Jackson
2006-02-06 9:32 ` Paul Jackson
2006-02-06 9:57 ` Andrew Morton
2006-02-06 9:18 ` Simon Derr
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