From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kevin Wolf Subject: Re: [Qemu-devel] [PATCH 0/2] improve qemu-img conversion performance Date: Fri, 09 Sep 2011 10:18:35 +0200 Message-ID: <4E69CBDB.1000401@redhat.com> References: <4E68CD7E.2050704@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from mx1.redhat.com ([209.132.183.28]:6625 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758478Ab1IIIPm (ORCPT ); Fri, 9 Sep 2011 04:15:42 -0400 In-Reply-To: Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Sage Weil Cc: Yehuda Sadeh , qemu-devel@nongnu.org, ceph-devel@vger.kernel.org, yehudasa@gmail.com Am 08.09.2011 18:36, schrieb Sage Weil: > On Thu, 8 Sep 2011, Kevin Wolf wrote: >> Am 08.09.2011 01:06, schrieb Yehuda Sadeh: >>> The following set of patches improve the qemu-img conversion process >>> performance. When using a higher latency backend, small writes have a >>> severe impact on the time it takes to do image conversion. >>> We switch to using async writes, and we avoid splitting writes due to >>> holes when the holes are small enough. >>> >>> Yehuda Sadeh (2): >>> qemu-img: async write to block device when converting image >>> qemu-img: don't skip writing small holes >>> >>> qemu-img.c | 34 +++++++++++++++++++++++++++------- >>> 1 files changed, 27 insertions(+), 7 deletions(-) >>> >> >> This doesn't seem to be against git master or the block tree. Please rebase. >> >> I think that commit a22f123c may obsolete your patch 2/2. > > With git.kernel.org down, where should I be looking for the latest > upstream? qemu has never been on kernel.org. The interesting repositories for you are: * Upstream: git://git.qemu.org/qemu.git master * Block development branch: git://repo.or.cz/qemu/kevin.git block Kevin From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:35051) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1R1wFT-0003eR-Tg for qemu-devel@nongnu.org; Fri, 09 Sep 2011 04:15:44 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1R1wFS-0002u9-EN for qemu-devel@nongnu.org; Fri, 09 Sep 2011 04:15:43 -0400 Received: from mx1.redhat.com ([209.132.183.28]:18426) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1R1wFR-0002u4-PO for qemu-devel@nongnu.org; Fri, 09 Sep 2011 04:15:42 -0400 Message-ID: <4E69CBDB.1000401@redhat.com> Date: Fri, 09 Sep 2011 10:18:35 +0200 From: Kevin Wolf MIME-Version: 1.0 References: <4E68CD7E.2050704@redhat.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH 0/2] improve qemu-img conversion performance List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Sage Weil Cc: Yehuda Sadeh , ceph-devel@vger.kernel.org, yehudasa@gmail.com, qemu-devel@nongnu.org Am 08.09.2011 18:36, schrieb Sage Weil: > On Thu, 8 Sep 2011, Kevin Wolf wrote: >> Am 08.09.2011 01:06, schrieb Yehuda Sadeh: >>> The following set of patches improve the qemu-img conversion process >>> performance. When using a higher latency backend, small writes have a >>> severe impact on the time it takes to do image conversion. >>> We switch to using async writes, and we avoid splitting writes due to >>> holes when the holes are small enough. >>> >>> Yehuda Sadeh (2): >>> qemu-img: async write to block device when converting image >>> qemu-img: don't skip writing small holes >>> >>> qemu-img.c | 34 +++++++++++++++++++++++++++------- >>> 1 files changed, 27 insertions(+), 7 deletions(-) >>> >> >> This doesn't seem to be against git master or the block tree. Please rebase. >> >> I think that commit a22f123c may obsolete your patch 2/2. > > With git.kernel.org down, where should I be looking for the latest > upstream? qemu has never been on kernel.org. The interesting repositories for you are: * Upstream: git://git.qemu.org/qemu.git master * Block development branch: git://repo.or.cz/qemu/kevin.git block Kevin