From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:35572) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WW6zI-0000O0-GY for qemu-devel@nongnu.org; Fri, 04 Apr 2014 12:29:10 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WW6zC-0004DR-Ca for qemu-devel@nongnu.org; Fri, 04 Apr 2014 12:29:04 -0400 Received: from mx1.redhat.com ([209.132.183.28]:6546) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WW6zC-0004DN-4D for qemu-devel@nongnu.org; Fri, 04 Apr 2014 12:28:58 -0400 Date: Fri, 4 Apr 2014 17:28:30 +0100 From: "Dr. David Alan Gilbert" Message-ID: <20140404162829.GA6393@work-vm> References: <1392713429-18201-1-git-send-email-mrhines@linux.vnet.ibm.com> <1392713429-18201-11-git-send-email-mrhines@linux.vnet.ibm.com> <531F84FD.7010608@redhat.com> <87mwgwz8ja.fsf@elfo.mitica> <531F9300.50304@redhat.com> <533E4331.2020202@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <533E4331.2020202@linux.vnet.ibm.com> Subject: Re: [Qemu-devel] [RFC PATCH v2 10/12] mc: expose tunable parameter for checkpointing frequency List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: "Michael R. Hines" Cc: GILR@il.ibm.com, SADEKJ@il.ibm.com, quintela@redhat.com, BIRAN@il.ibm.com, hinesmr@cn.ibm.com, qemu-devel@nongnu.org, EREZH@il.ibm.com, Luiz Capitulino , owasserm@redhat.com, junqing.wang@cs2c.com.cn, onom@us.ibm.com, abali@us.ibm.com, lig.fnst@cn.fujitsu.com, gokul@us.ibm.com, dbulkow@gmail.com, pbonzini@redhat.com, isaku.yamahata@gmail.com, "Michael R. Hines" One thing to be a little careful about if we merge these tunables together, is what tunables are allowed to be changed while the migration is running. The 'capabilities' are currently fixed once the migration starts, but I know at least some of the tuneables people want to change while things are going - and some care is needed with it since (as we found with the xbzrle cache size) we get fun due to the use being in a different thread. Dave -- Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK