From mboxrd@z Thu Jan 1 00:00:00 1970 From: Harald Dunkel Subject: Re: how to tweak kernel to get the best out of kvm? Date: Mon, 15 Mar 2010 14:54:13 +0100 Message-ID: <4B9E3C05.9090808@aixigo.de> References: <4B912156.5020707@darkharri.de> <4B94D947.3060303@redhat.com> <4B979776.1000701@aixigo.de> <4B979B81.5060508@redhat.com> <4B98EEFA.2090208@aixigo.de> <4B9B52B4.9040505@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: Harald Dunkel , KVM Mailing List To: Avi Kivity Return-path: Received: from mail.aixigo.de ([195.14.232.227]:46874 "EHLO mail.aixigo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S936249Ab0CONyh (ORCPT ); Mon, 15 Mar 2010 09:54:37 -0400 In-Reply-To: <4B9B52B4.9040505@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: On 03/13/10 09:54, Avi Kivity wrote: > > If the slowdown is indeed due to I/O, LVM (with cache=off) should > eliminate it completely. > As promised I have installed LVM: The difference is remarkable. My test case (running 8 vhosts in parallel, each building a Linux kernel) just works. There is no blocking job (by now), all vhosts can be pinged, great. Many thanx for your help, and for the nice software, of course. Regards Harri