Date: Sun, 11 Apr 2010 20:16:09 +0200 (CEST)
From: Thomas Gleixner <tglx@linutronix.de>
To: Avi Kivity <avi@redhat.com>
cc: Ben Gamari <bgamari.foss@gmail.com>, Andi Kleen <andi@firstfloor.org>,
       Arjan van de Ven <arjan@infradead.org>,
       LKML <linux-kernel@vger.kernel.org>, tytso@mit.edu, npiggin@suse.de,
       Ingo Molnar <mingo@elte.hu>, Ruald Andreae <ruald.a@gmail.com>,
       Jens Axboe <jens.axboe@oracle.com>, Olly Betts <olly@survex.com>,
       martin f krafft <madduck@madduck.net>
Subject: Re: Poor interactive performance with I/O loads with fsync()ing
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On Sun, 11 Apr 2010, Avi Kivity wrote:

> On 04/09/2010 05:56 PM, Ben Gamari wrote:
> > On Mon, 29 Mar 2010 00:08:58 +0200, Andi Kleen<andi@firstfloor.org>  wrote:
> >    
> > > Ben Gamari<bgamari.foss@gmail.com>  writes:
> > > ext4/XFS/JFS/btrfs should be better in this regard
> > > 
> > >      
> > I am using btrfs, so yes, I was expecting things to be better.
> > Unfortunately,
> > the improvement seems to be non-existent under high IO/fsync load.
> > 
> >    
> 
> btrfs is known to perform poorly under fsync.

XFS does not do much better. Just moved my VM images back to ext for
that reason.

Thanks,

	tglx
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