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Re: XFS filesystem performance drop in kernels 2.6.16+

To: Eric Sandeen <sandeen@xxxxxxxxxxx>
Subject: Re: XFS filesystem performance drop in kernels 2.6.16+
From: Jan Engelhardt <jengelh@xxxxxxxxxxxxxxx>
Date: Fri, 10 Nov 2006 12:59:59 +0100 (MET)
Cc: "Igor A. Valcov" <viaprog@xxxxxxxxx>, linux-kernel <linux-kernel@xxxxxxxxxxxxxxx>, xfs@xxxxxxxxxxx
In-reply-to: <4553F3C6.2030807@xxxxxxxxxxx>
References: <bde600590611090930g3ab97aq3c76d7bca4ec267f@xxxxxxxxxxxxxx> <4553F3C6.2030807@xxxxxxxxxxx>
Sender: xfs-bounce@xxxxxxxxxxx
>> I also noticed that I/O barriers were introduced in v2.6.16 and
>> thought they may be the cause, but mounting the file system with
>> 'nobarrier' doesn't seem to affect the performance in any way.
>
>
> did this happen to be a remount with nobarrier, or a fresh mount?

For the barrier stuff, see
http://lkml.org/lkml/2006/5/19/33


        -`J'
-- 


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