From: Andrew Morton <akpm@digeo.com>
To: "J.A. Magallon" <jamagallon@able.es>
Cc: Lista Linux-Kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCHSET] Linux 2.4.20-jam0
Date: Sat, 30 Nov 2002 14:15:43 -0800 [thread overview]
Message-ID: <3DE9388F.CD7E33FB@digeo.com> (raw)
In-Reply-To: 20021130144541.GA2517@werewolf.able.es
"J.A. Magallon" wrote:
>
> On 2002.11.30 Andrew Morton wrote:
> >"J.A. Magallon" wrote:
> >>
> >> - Orlov inode allocator for 2.4
> >
> >The Orlov allocator in 2.5 has caused a tremendous performance regression
> >in dbench-on-ext3/ordered-on-scsi.
> >
> >I don't know why yet - I doubt if it's due to the allocator itself - more
> >likely an IO scheduling bug in ext3, or a bug in the 2.5 elevator.
> >
> >There is no such regression on IDE - presumably write caching is covering
> >up the problem.
> >
>
> Is there any way I can test that ? I have all scsi drives and can
> for example remount with 'orlov' or 'oldalloc'...
It is specific to SMP, and for some reason doesn't manifest with
IDE hardware.
See
http://sourceforge.net/mailarchive/forum.php?thread_id=1365460&forum_id=6379
for the analysis.
next prev parent reply other threads:[~2002-11-30 22:08 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-11-29 23:38 [PATCHSET] Linux 2.4.20-jam0 J.A. Magallon
2002-11-30 0:47 ` Andrew Morton
2002-11-30 14:45 ` J.A. Magallon
2002-11-30 14:58 ` Sean Neakums
2002-11-30 15:02 ` J.A. Magallon
2002-11-30 22:15 ` Andrew Morton [this message]
2002-11-30 6:36 ` hugang
2002-11-30 14:58 ` J.A. Magallon
2002-11-30 17:07 ` Mike Galbraith
2002-11-30 17:50 ` Andrea Arcangeli
2002-11-30 23:36 ` J.A. Magallon
2002-12-01 1:55 ` J.A. Magallon
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