From: Stian Jordet <liste@jordet.net>
To: Sven-Haegar Koch <haegar@sdinet.de>
Cc: xfs@oss.sgi.com, linux-kernel@vger.kernel.org
Subject: Re: Extreme slowness with xfs [WAS: Re: Slowness with new pc]
Date: Tue, 25 Nov 2008 21:44:47 +0100 [thread overview]
Message-ID: <1227645887.7992.10.camel@chevrolet> (raw)
In-Reply-To: <alpine.DEB.2.00.0811250057510.27010@aurora.sdinet.de>
ti., 25.11.2008 kl. 01.09 +0100, skrev Sven-Haegar Koch:
> I had the same problem when I tried it on my laptop (T60) - using it on
> the unencrypted root filesystem (with /usr/src) took ages, using it on
> the LUKS encrypted /home was blasing fast - on the same disk.
>
> This test was some time ago with something like 2.6.20 or 2.6.24 - I
> gave up and reformatted / with ext3 as I needed the machine.
>
> I think barriers were the problem, they seem to cost performance like
> hell, especially for operations with many small files. My laptop used
> barriers for xfs on the direct partition, but not on crypto drivermapper
> mounts.
>
> So perhaps try mounting with nobarrier and see if the speed problem goes
> away - but know that you sacrifice some crash-resilience when doing so.
Barriers were the problem indeed. My old system had no problems with
barriers, but here it did an incredible difference.
Thanks!
-Stian
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next prev parent reply other threads:[~2008-11-25 20:44 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1226760254.5089.11.camel@chevrolet>
[not found] ` <430c4fa50811180551r67d5d680tf1ffa493604ac4ea@mail.gmail.com>
2008-11-23 21:48 ` Extreme slowness with xfs [WAS: Re: Slowness with new pc] Stian Jordet
2008-11-23 22:25 ` Justin Piszcz
2008-11-24 0:19 ` Stian Jordet
2008-11-24 9:50 ` Justin Piszcz
2008-11-24 23:36 ` Stian Jordet
2008-11-24 23:52 ` Justin Piszcz
2008-11-25 0:09 ` Sven-Haegar Koch
2008-11-25 20:44 ` Stian Jordet [this message]
2008-11-25 21:22 ` Eric Sandeen
[not found] ` <1227649893.6557.10.camel@oldsmobile>
2008-11-25 22:02 ` David Sparks
2008-11-25 22:31 ` Stian Jordet
2008-11-25 1:36 ` Eric Sandeen
[not found] ` <1227647010.7992.34.camel@chevrolet>
2008-11-26 12:30 ` Martin Steigerwald
2008-11-26 21:43 ` Dave Chinner
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