From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Lieven Subject: Re: [Bug 1100843] Re: Live Migration Causes Performance Issues Date: Mon, 07 Oct 2013 08:38:52 +0200 Message-ID: <525256FC.6060608@dlhnet.de> References: <20130117163740.7157.55600.malonedeb@gac.canonical.com> <20130926203354.30826.10562.malone@soybean.canonical.com> <52516C4A.6080508@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: qemu-devel To: Zhang Haoyu , Bug 1100843 <1100843@bugs.launchpad.net>, gleb@redhat.com, eblake@redhat.com, quintela@redhat.com, pbonzini@redhat.com, afaerber@suse.de, xiaoguangrong@linux.vnet.ibm.com, mtosatti@redhat.com, kvm@vger.kernel.org, mst@redhat.com Return-path: In-Reply-To: <52516C4A.6080508@gmail.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+gceq-qemu-devel=gmane.org@nongnu.org Sender: qemu-devel-bounces+gceq-qemu-devel=gmane.org@nongnu.org List-Id: kvm.vger.kernel.org On 06.10.2013 15:57, Zhang Haoyu wrote: >> >From my testing this has been fixed in the saucy version (1.5.0) of > qemu. It is fixed by this patch: >> f1c72795af573b24a7da5eb52375c9aba8a37972 >> >> However later in the history this commit was reverted, and again broke > this. The other commit that fixes this is: >> 211ea74022f51164a7729030b28eec90b6c99a08 >> > See below post,please. > https://lists.gnu.org/archive/html/qemu-devel/2013-08/msg05062.html I would still like to fix qemu to not load roms etc. if we set up a migration target. In this case we could drop the madvise, skip the checking for zero pages and also could avoid sending zero pages at all. It would be the cleanest solution. Peter