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

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Message-ID: <4C3B1BAC.1050907@msgid.tls.msk.ru>
Date:	Mon, 12 Jul 2010 17:42:04 +0400
From:	Michael Tokarev <mjt@....msk.ru>
To:	Josef Bacik <josef@...hat.com>
CC:	Giangiacomo Mariotti <gg.mariotti@...il.com>,
	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

Josef Bacik 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,

Um.  Do you mean it were introduced in BTRFS or general? :)

Because, wel, O_DIRECT is here and supported since some 2.2 times... ;)

/mjt
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