From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Mueller Subject: Re: qcow2 slowdown in kvm-78,79 Date: Wed, 19 Nov 2008 17:55:30 +0000 (UTC) Message-ID: References: <1227019192.22098.4.camel@henrik-desktop> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit To: kvm@vger.kernel.org Return-path: Received: from main.gmane.org ([80.91.229.2]:47332 "EHLO ciao.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752939AbYKSRzn (ORCPT ); Wed, 19 Nov 2008 12:55:43 -0500 Received: from list by ciao.gmane.org with local (Exim 4.43) id 1L2rH7-0002S7-B8 for kvm@vger.kernel.org; Wed, 19 Nov 2008 17:55:37 +0000 Received: from 77-58-232-244.dclient.hispeed.ch ([77.58.232.244]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 19 Nov 2008 17:55:37 +0000 Received: from thomas by 77-58-232-244.dclient.hispeed.ch with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 19 Nov 2008 17:55:37 +0000 Sender: kvm-owner@vger.kernel.org List-ID: On Tue, 18 Nov 2008 15:39:52 +0100, Henrik Holst wrote: > The bundled qemu in kvm-78 and kvm-79 slows down disk i/o with qcow2 > images by an order of 10. If one got 60MB/s before, one gets around > 6MB/s with 78 and 79 (measured with dd) so i'm not the only one facing this problem. - Thomas