From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tomasz Chmielewski Subject: Re: I/O errors after migration - why? Date: Fri, 27 Mar 2009 19:43:07 +0100 Message-ID: <49CD1E3B.2000600@wpkg.org> References: <49CD0014.5020503@wpkg.org> <49CD0406.3030606@wpkg.org> <49CD0680.6090903@wpkg.org> <49CD0977.9060407@wpkg.org> <49CD0DE6.50907@codemonkey.ws> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: "kvm@vger.kernel.org" To: Anthony Liguori Return-path: Received: from mx03.syneticon.net ([78.111.66.105]:51530 "EHLO mx03.syneticon.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752323AbZC0SnN (ORCPT ); Fri, 27 Mar 2009 14:43:13 -0400 In-Reply-To: <49CD0DE6.50907@codemonkey.ws> Sender: kvm-owner@vger.kernel.org List-ID: Anthony Liguori schrieb: (...) >>>> Similar symptoms with virtio_blk (i.e., when guest is booted off a >>>> live CD and tries to access the disk after migration). >>>> >>>> The only difference between SCSI and virtio_blk is that SCSI signals >>>> errors and aborts, and virtio_blk waits forever and doesn't give a >>>> clue. >> >> That is interesting (or not?). >> >> In monitor, after migration, "info block" says: >> >> scsi0-hd0: type=hd ... >> >> Before migration, it was: >> >> virtio0: type=hd ... >> >> ? >> >> On both sides the guest was started with the same option (delta >> "-incoming..."). > > Can you give the full command line on both ends and what KVM version it is? kvm-84 /usr/bin/kvm -monitor unix:/var/run/qemu-server/117.mon,server,nowait -vnc unix:/var/run/qemu-server/117.vnc,password -pidfile /var/run/qemu-server/117.pid -daemonize -usbdevice tablet -name opennms1 -smp 1 -id 117 -cpuunits 1000 -vga cirrus -tdf -k de -drive file=/var/lib/vz/template/iso/systemrescuecd-x86-1.1.7-beta3.iso,if=ide,index=2,media=cdrom -drive file=/dev/disk/by-path/ip-10.2.18.9:3260-iscsi-iqn.2009-03.net.syneticon:san3.opennms1-lun-1,if=scsi,index=0,boot=on -m 400 -net tap,vlan=6,ifname=vmtab117i6,script=/var/lib/qemu-server/bridge-vlan6 -net nic,vlan=6,model=e1000,macaddr=F6:13:A3:72:4D:9F -serial unix:/var/run/qemu-server/117.serial,server,nowait -incoming tcp:0:4444 file=/dev/disk/by-path... is a symlink to a proper /dev/sdX device (i.e. /dev/sdah on host1, /dev/sds on host2). When checked with lsof, kvm process uses a proper /dev/sdX device on both hosts. -- Tomasz Chmielewski http://wpkg.org