linux-kernel - Re: BTRFS: Unbelievably slow with kvm/qemu

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Message-ID: <20100712202424.GC2881@localhost.localdomain>
Date:	Mon, 12 Jul 2010 16:24:25 -0400
From:	Josef Bacik <josef@...hat.com>
To:	Giangiacomo Mariotti <gg.mariotti@...il.com>
Cc:	Josef Bacik <josef@...hat.com>, Michael Tokarev <mjt@....msk.ru>,
	linux-kernel@...r.kernel.org,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	qemu-devel <qemu-devel@...gnu.org>
Subject: Re: BTRFS: Unbelievably slow with kvm/qemu

On Mon, Jul 12, 2010 at 10:23:14PM +0200, Giangiacomo Mariotti wrote:
> On Mon, Jul 12, 2010 at 3:43 PM, Josef Bacik <josef@...hat.com> wrote:
> >
> > O_DIRECT support was just introduced recently, please try on the latest kernel
> > with the normal settings (which IIRC uses O_DIRECT), that should make things
> > suck alot less.  Thanks,
> >
> > Josef
> >
> With latest kernel do you mean the current Linus' git tree? Because if
> instead you're talking about the current stable kernel, that's the one
> I used on my test.
> 

Yes Linus' git tree.  Thanks,

Josef
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