linux-ext4 - Re: Performance of ext4

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Message-ID: <20080612013509.GS8397@mit.edu>
Date:	Wed, 11 Jun 2008 21:35:09 -0400
From:	Theodore Tso <tytso@....edu>
To:	Holger Kiehl <Holger.Kiehl@....de>
Cc:	linux-ext4@...r.kernel.org,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: Performance of ext4

On Wed, Jun 11, 2008 at 08:21:50PM +0000, Holger Kiehl wrote:
> I think you mean 'small files'? 

Yes, sorry, I meant "small files".

> The test where done with a plain 2.6.25.4,
> does that already have barriers enabled? While I did some test I hit this 
> bug:

No, 2.6.25.4 does not have barriers enabled.  It's in the latest
post-2.6.25.5 git repository (which also has the fix so that
barriers=1 doesn't cause an OOPS if you are doing the test on a LVM
device which doesn't support barriers).  Sorry, I wasnt sure if you
were using any of the ext4 patches, and I didn't know whether you were
testing on a raw device or an LVM device.

							 - Ted
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