From: Lee Revell <rlrevell@joe-job.com>
To: Mike Galbraith <efault@gmx.de>
Cc: Con Kolivas <kernel@kolivas.org>, Andrew Morton <akpm@osdl.org>,
linux-kernel@vger.kernel.org, ck@vds.kolivas.org
Subject: Re: [PATCH] mm: Implement swap prefetching tweaks
Date: Sat, 11 Mar 2006 23:54:42 -0500 [thread overview]
Message-ID: <1142139283.25358.68.camel@mindpipe> (raw)
In-Reply-To: <1142063500.7605.13.camel@homer>
On Sat, 2006-03-11 at 08:51 +0100, Mike Galbraith wrote:
> There used to be a pages in flight 'restrictor plate' in there that
> would have probably helped this situation at least a little. But in
> any case, it sounds like you'll have to find a way to submit the IO in
> itty bitty synchronous pieces.
echo 64 > /sys/block/hd*/queue/max_sectors_kb
There is basically a straight linear relation between whatever you set
this to and the maximum scheduling latency you see. It was developed to
solve the exact problem you are describing.
Lee
next prev parent reply other threads:[~2006-03-12 4:54 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-10 9:54 [PATCH] mm: Implement swap prefetching tweaks Con Kolivas
2006-03-10 22:35 ` Andrew Morton
2006-03-10 23:11 ` Peter Williams
2006-03-11 4:18 ` Con Kolivas
2006-03-11 4:28 ` Peter Williams
2006-03-11 4:34 ` Con Kolivas
2006-03-11 5:34 ` Peter Williams
2006-03-11 5:04 ` [ck] " Radoslaw Szkodzinski
2006-03-11 5:21 ` Con Kolivas
2006-03-11 5:46 ` Peter Williams
2006-03-11 3:50 ` Con Kolivas
2006-03-11 5:33 ` Mike Galbraith
2006-03-11 5:50 ` Con Kolivas
2006-03-11 5:58 ` Con Kolivas
2006-03-11 6:11 ` Mike Galbraith
2006-03-11 6:00 ` Mike Galbraith
2006-03-11 6:05 ` Mike Galbraith
2006-03-11 7:20 ` Con Kolivas
2006-03-11 7:44 ` Mike Galbraith
2006-03-11 8:16 ` Nick Piggin
2006-03-11 8:22 ` Mike Galbraith
2006-03-11 7:24 ` Con Kolivas
2006-03-11 7:51 ` Mike Galbraith
2006-03-11 8:15 ` Con Kolivas
2006-03-12 4:54 ` Lee Revell [this message]
2006-03-12 5:27 ` Mike Galbraith
2006-03-12 8:36 ` Con Kolivas
2006-03-14 6:40 ` Mike Galbraith
2006-03-14 6:50 ` Lee Revell
2006-03-14 7:06 ` Mike Galbraith
2006-03-14 8:44 ` Mike Galbraith
2006-03-14 8:05 ` [ck] " Jens Axboe
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