From: Andrew Morton <akpm@osdl.org>
To: Ram Pai <linuxram@us.ibm.com>
Cc: nickpiggin@yahoo.com.au, hugh@veritas.com, dice@mfa.kfki.hu,
vda@port.imtp.ilyichevsk.odessa.ua, linux-kernel@vger.kernel.org
Subject: Re: data loss in 2.6.9-rc1-mm1
Date: Mon, 30 Aug 2004 23:39:14 -0700 [thread overview]
Message-ID: <20040830233914.0734fdd6.akpm@osdl.org> (raw)
In-Reply-To: <1093933516.2424.55.camel@dyn319181.beaverton.ibm.com>
Ram Pai <linuxram@us.ibm.com> wrote:
>
> > OK - maybe that can go for a spin in the next -mm. Andrew did you
> > get it?
>
> So in case my vote counts, add my vote too :) .
>
Can someone send me the patch?
>
> But the biggest performance boost has been seen with large max-readahead
> window sizes. Currently most of the underlying block devices default to
> 32 pages max-readahead even though the underlying device can handle
> much larger reads. We could extract much more sequential read
> performance if the max-readahead was set to much higher values like 256
> pages which most modern devices are capable off. The problem AFAICT is
> that the block device layer defaults the max-readahead value for most
> block devices to 32, without consulting the capability of the underlying
> block device driver.
This can be done in startup scripts.
next prev parent reply other threads:[~2004-08-31 6:44 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-27 10:55 data loss in 2.6.9-rc1-mm1 Gergely Tamas
2004-08-27 11:05 ` Anton Altaparmakov
2004-08-27 11:40 ` Gergely Tamas
2004-08-27 12:35 ` Fabio Coatti
2004-08-27 11:17 ` Tim Schmielau
2004-08-27 11:43 ` Gergely Tamas
2004-08-27 11:37 ` Mikael Pettersson
2004-08-27 11:55 ` Denis Vlasenko
2004-08-27 13:56 ` Hugh Dickins
2004-08-27 14:18 ` Gergely Tamas
2004-08-27 15:36 ` Fabio Coatti
2004-08-27 18:30 ` Ram Pai
2004-08-27 19:08 ` Hugh Dickins
2004-08-27 21:04 ` Ram Pai
2004-08-28 4:35 ` Nick Piggin
2004-08-28 5:01 ` Ram Pai
2004-08-28 5:42 ` Andrew Morton
2004-08-28 5:54 ` Nick Piggin
2004-08-28 9:44 ` Rafael J. Wysocki
2004-08-28 9:45 ` Andrew Morton
2004-08-28 10:18 ` Nick Piggin
2004-08-28 10:47 ` Rafael J. Wysocki
2004-08-28 14:52 ` Hugh Dickins
2004-08-29 1:30 ` Nick Piggin
2004-08-31 6:25 ` Ram Pai
2004-08-31 6:39 ` Andrew Morton [this message]
-- strict thread matches above, loose matches on Subject: below --
2004-08-28 12:05 Joachim Bremer
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