From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:34086) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aqFoP-0006l7-QH for qemu-devel@nongnu.org; Wed, 13 Apr 2016 04:06:10 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aqFoM-0001rD-KS for qemu-devel@nongnu.org; Wed, 13 Apr 2016 04:06:09 -0400 Received: from mx1.redhat.com ([209.132.183.28]:54856) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aqFoM-0001r8-Fd for qemu-devel@nongnu.org; Wed, 13 Apr 2016 04:06:06 -0400 Date: Wed, 13 Apr 2016 09:06:01 +0100 From: "Dr. David Alan Gilbert" Message-ID: <20160413080545.GA2270@work-vm> References: <20160412175501.GB6415@work-vm> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Subject: Re: [Qemu-devel] post-copy is broken? List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: "Li, Liang Z" , aarcange@redhat.com Cc: Amit Shah , "qemu-devel@nongnu.org" , "quintela@redhat.com" * Li, Liang Z (liang.z.li@intel.com) wrote: > > > > I used the latest qemu code (commit id: 4e71220387e88a22) and kernel > > > (v4.5) to test the post-copy, and find the guest get crashed after > > > live migration, no matter I did a local live migration or live > > > migration between two hosts. I just ran the stress as the workload in > > > guest. It seems the post-copy is broken? > > > > > > > > Stress parameters: stress --vm 2 --vm-hang 1 --vm-bytes 2048M > > > > --vm-keep QEMU parameters: ./qemu-system-x86_64 --enable-kvm - > > smp > > > 4 -m > > > > 8192 -monitor stdio -drive file=/share/centos6u6.qcow > > > > > > My test seems to be working here (4.4.6-301.fc23 kernel) same qemu > > > version. > > > This is with an f20 guest running google stressapptest. > > > > > > What's your last working version? > > > > > > > This is my first try of post-copy after the related patches been merged. > > I will double check and get back to you. > > > > Thanks! > > Liang > > > > > Dave > > I tried the v4.4 upstream kernel, the issue was disappeared. It must be some changes between kernel v4.4 and v4.5 > breaks post-copy. Oh, fun. cc'ing in Andrea. Dave > Liang. > > > > > > > > Liang > > > -- > > > Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK > -- Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK