From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: migrate_set_downtime bug Date: Mon, 05 Oct 2009 14:17:30 +0200 Message-ID: <4AC9E3DA.6000607@redhat.com> References: <90D306BE6EBC8D428A824FBBA7A3113DFDCDF175@ronja.maurer-it.com> <90D306BE6EBC8D428A824FBBA7A3113DFDCDF178@ronja.maurer-it.com> <90D306BE6EBC8D428A824FBBA7A3113DFDCDF179@ronja.maurer-it.com> <4AC22A4D.5060805@codemonkey.ws> <20090929162345.GX29735@mothafucka.localdomain> <90D306BE6EBC8D428A824FBBA7A3113DFDCDF17D@ronja.maurer-it.com> <20090930044832.GA5149@mothafucka.localdomain> <90D306BE6EBC8D428A824FBBA7A3113DFDCDF184@ronja.maurer-it.com> <20090930112328.GB5149@mothafucka.localdomain> <90D306BE6EBC8D428A824FBBA7A3113DFDCDF18D@ronja.maurer-it.com> <20090930163951.GD5149@mothafucka.localdomain> <90D306BE6EBC8D428A824FBBA7A3113DFDCDF18E@ronja.maurer-it.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Glauber Costa , Anthony Liguori , kvm To: Dietmar Maurer Return-path: Received: from mx1.redhat.com ([209.132.183.28]:63572 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751371AbZJEMSF (ORCPT ); Mon, 5 Oct 2009 08:18:05 -0400 In-Reply-To: <90D306BE6EBC8D428A824FBBA7A3113DFDCDF18E@ronja.maurer-it.com> Sender: kvm-owner@vger.kernel.org List-ID: On 09/30/2009 08:41 PM, Dietmar Maurer wrote: > > I just think of common scenarios like 'maintanace mode', where all VM should migrate to another host. A endless migrate task can make that fail. > > For me, it is totally unclear what value I should set for 'max_downtime' to avoid that behavior? > > We used to have a heuristic that said 'if an iteration transfers more pages than the previous iteration, we've stopped converging'. Why wouldn't that work? -- error compiling committee.c: too many arguments to function