From: Christoph Lameter <cl@linux.com>
To: Pekka Enberg <penberg@kernel.org>
Cc: James Bottomley <James.Bottomley@hansenpartnership.com>,
Dave Jones <davej@redhat.com>, Mel Gorman <mgorman@suse.de>,
Andrew Morton <akpm@linux-foundation.org>,
Colin King <colin.king@canonical.com>,
Raghavendra D Prabhu <raghu.prabhu13@gmail.com>,
Jan Kara <jack@suse.cz>, Chris Mason <chris.mason@oracle.com>,
Rik van Riel <riel@redhat.com>,
Johannes Weiner <hannes@cmpxchg.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
linux-mm <linux-mm@kvack.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
linux-ext4 <linux-ext4@vger.kernel.org>,
Andrea Arcangeli <aarcange@redhat.com>
Subject: Re: [PATCH 3/3] mm: slub: Default slub_max_order to 0
Date: Thu, 12 May 2011 12:38:34 -0500 (CDT) [thread overview]
Message-ID: <alpine.DEB.2.00.1105121232110.28493@router.home> (raw)
In-Reply-To: <BANLkTimDsJDht76Vm7auNqT2gncjpEKZQw@mail.gmail.com>
On Thu, 12 May 2011, Pekka Enberg wrote:
> On Thu, May 12, 2011 at 8:06 PM, Pekka Enberg <penberg@kernel.org> wrote:
> > On Thu, May 12, 2011 at 7:30 PM, James Bottomley
> > <James.Bottomley@hansenpartnership.com> wrote:
> >> So suggest an alternative root cause and a test to expose it.
> >
> > Is your .config available somewhere, btw?
>
> If it's this:
>
> http://pkgs.fedoraproject.org/gitweb/?p=kernel.git;a=blob_plain;f=config-x86_64-generic;hb=HEAD
>
> I'd love to see what happens if you disable
>
> CONFIG_TRANSPARENT_HUGEPAGE=y
>
> because that's going to reduce high order allocations as well, no?
I dont think that will change much since huge pages are at MAX_ORDER size.
Either you can get them or not. The challenge with the small order
allocations is that they require contiguous memory. Compaction is likely
not as effective as the prior mechanism that did opportunistic reclaim of
neighboring pages.
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next prev parent reply other threads:[~2011-05-12 17:38 UTC|newest]
Thread overview: 77+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-11 15:29 [PATCH 0/3] Reduce impact to overall system of SLUB using high-order allocations Mel Gorman
2011-05-11 15:29 ` [PATCH 1/3] mm: slub: Do not wake kswapd for SLUBs speculative " Mel Gorman
2011-05-11 20:38 ` David Rientjes
2011-05-11 15:29 ` [PATCH 2/3] mm: slub: Do not take expensive steps " Mel Gorman
2011-05-11 20:38 ` David Rientjes
2011-05-11 21:10 ` Mel Gorman
2011-05-12 17:25 ` Andrea Arcangeli
2011-05-11 15:29 ` [PATCH 3/3] mm: slub: Default slub_max_order to 0 Mel Gorman
2011-05-11 20:38 ` David Rientjes
2011-05-11 20:53 ` James Bottomley
2011-05-11 21:09 ` Mel Gorman
2011-05-11 22:27 ` David Rientjes
2011-05-13 10:14 ` Mel Gorman
2011-05-12 17:36 ` Andrea Arcangeli
2011-05-16 21:03 ` David Rientjes
2011-05-17 9:48 ` Mel Gorman
2011-05-17 19:25 ` David Rientjes
2011-05-12 14:43 ` Christoph Lameter
2011-05-12 15:15 ` James Bottomley
2011-05-12 15:27 ` Christoph Lameter
2011-05-12 15:43 ` James Bottomley
2011-05-12 15:46 ` Dave Jones
2011-05-12 16:00 ` James Bottomley
2011-05-12 16:08 ` Dave Jones
2011-05-12 16:27 ` Christoph Lameter
2011-05-12 16:30 ` James Bottomley
2011-05-12 16:48 ` Christoph Lameter
2011-05-12 17:46 ` Andrea Arcangeli
2011-05-12 18:00 ` Christoph Lameter
2011-05-12 18:18 ` Andrea Arcangeli
2011-05-12 17:06 ` Pekka Enberg
2011-05-12 17:11 ` Pekka Enberg
2011-05-12 17:38 ` Christoph Lameter [this message]
2011-05-12 18:00 ` Andrea Arcangeli
2011-05-13 9:49 ` Mel Gorman
2011-05-15 16:39 ` Andrea Arcangeli
2011-05-16 8:42 ` Mel Gorman
2011-05-12 17:51 ` Andrea Arcangeli
2011-05-12 18:03 ` Christoph Lameter
2011-05-12 18:09 ` Andrea Arcangeli
2011-05-12 18:16 ` Christoph Lameter
2011-05-12 18:36 ` James Bottomley
2011-05-12 17:40 ` Andrea Arcangeli
2011-05-12 15:55 ` Pekka Enberg
2011-05-12 18:37 ` James Bottomley
2011-05-12 18:46 ` Christoph Lameter
2011-05-12 19:21 ` James Bottomley
2011-05-12 19:44 ` James Bottomley
2011-05-12 20:04 ` James Bottomley
2011-05-12 20:29 ` Johannes Weiner
2011-05-12 20:31 ` Johannes Weiner
2011-05-12 20:31 ` James Bottomley
2011-05-12 22:04 ` James Bottomley
2011-05-12 22:15 ` Johannes Weiner
2011-05-12 22:58 ` Minchan Kim
2011-05-13 5:39 ` Minchan Kim
2011-05-13 0:47 ` James Bottomley
2011-05-13 4:12 ` James Bottomley
2011-05-13 10:55 ` Mel Gorman
2011-05-13 14:16 ` James Bottomley
2011-05-13 10:30 ` Mel Gorman
2011-05-13 6:16 ` Pekka Enberg
2011-05-13 10:05 ` Mel Gorman
2011-05-12 16:01 ` Christoph Lameter
2011-05-12 16:10 ` Eric Dumazet
2011-05-12 17:37 ` Andrew Morton
2011-05-12 15:45 ` Dave Jones
2011-05-11 21:39 ` [PATCH 0/3] Reduce impact to overall system of SLUB using high-order allocations James Bottomley
2011-05-11 22:28 ` David Rientjes
2011-05-11 22:34 ` James Bottomley
2011-05-12 11:13 ` Pekka Enberg
2011-05-12 13:19 ` Mel Gorman
2011-05-12 14:04 ` James Bottomley
2011-05-12 15:53 ` James Bottomley
2011-05-13 11:25 ` Mel Gorman
2011-05-12 18:04 ` Andrea Arcangeli
2011-05-13 11:24 ` Mel Gorman
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