Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754627Ab0GLNmJ (ORCPT ); Mon, 12 Jul 2010 09:42:09 -0400 Received: from isrv.corpit.ru ([81.13.33.159]:43976 "EHLO isrv.corpit.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754607Ab0GLNmH (ORCPT ); Mon, 12 Jul 2010 09:42:07 -0400 Message-ID: <4C3B1BAC.1050907@msgid.tls.msk.ru> Date: Mon, 12 Jul 2010 17:42:04 +0400 From: Michael Tokarev User-Agent: Mozilla-Thunderbird 2.0.0.22 (X11/20090706) MIME-Version: 1.0 To: Josef Bacik CC: Giangiacomo Mariotti , linux-kernel@vger.kernel.org, linux-fsdevel , qemu-devel Subject: Re: BTRFS: Unbelievably slow with kvm/qemu References: <4C3ABF96.9070405@msgid.tls.msk.ru> <20100712134347.GB15754@dhcp231-156.rdu.redhat.com> In-Reply-To: <20100712134347.GB15754@dhcp231-156.rdu.redhat.com> X-Enigmail-Version: 0.95.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 594 Lines: 16 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/