From: Christoph Lameter <clameter@sgi.com>
To: Mel Gorman <mel@csn.ul.ie>
Cc: akpm@linux-foundation.org, linux-mm@kvack.org
Subject: Re: SLUB: Reduce antifrag max order
Date: Wed, 9 May 2007 11:25:22 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.4.64.0705091123530.28965@schroedinger.engr.sgi.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0705081411440.20563@skynet.skynet.ie>
On Tue, 8 May 2007, Mel Gorman wrote:
> Anti-frag still depends on reclaim to take place and I imagine you have not
> altered min_free_kbytes to keep pages free. Also, I don't think kswapd is
> currently making any effort to keep blocks free at a known desired order
> although I'm cc'ing Andy Whitcroft to confirm. As the kernel gives up easily
> when order > PAGE_ALLOC_COSTLY_ORDER, prehaps you should be using
> PAGE_ALLOC_COSTLY_ORDER instead of DEFAULT_ANTIFRAG_MAX_ORDER for SLUB.
One other interesting item: I accidentally left a machine running with
slub_min_order=6 (1G UP x86_64). It ran for at least a day while I
prepped mm patches on it. Failed today when I tried to untar a kernel
tarball.
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prev parent reply other threads:[~2007-05-09 18:25 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-05 16:26 Christoph Lameter
2007-05-08 13:15 ` Mel Gorman
2007-05-08 16:12 ` Christoph Lameter
2007-05-09 18:25 ` Christoph Lameter [this message]
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