linux-kernel - Re: Poor interactive performance with I/O loads with fsync()ing

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Message-ID: <alpine.LFD.2.00.1004112014520.18009@localhost.localdomain>
Date:	Sun, 11 Apr 2010 20:16:09 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Avi Kivity <avi@...hat.com>
cc:	Ben Gamari <bgamari.foss@...il.com>,
	Andi Kleen <andi@...stfloor.org>,
	Arjan van de Ven <arjan@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>, tytso@....edu,
	npiggin@...e.de, Ingo Molnar <mingo@...e.hu>,
	Ruald Andreae <ruald.a@...il.com>,
	Jens Axboe <jens.axboe@...cle.com>,
	Olly Betts <olly@...vex.com>,
	martin f krafft <madduck@...duck.net>
Subject: Re: Poor interactive performance with I/O loads with fsync()ing

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@...stfloor.org>  wrote:
> >    
> > > Ben Gamari<bgamari.foss@...il.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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