[Bug 1859418] Re: disk driver with iothread setting hangs live migrations
[Expired for QEMU because there has been no activity for 60 days.] ** Changed in: qemu Status: Incomplete => Expired -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1859418 Title: disk driver with iothread setting hangs live migrations Status in QEMU: Expired Bug description: Per report raised at https://bugzilla.redhat.com/show_bug.cgi?id=1790093 Description of problem: A disk driver definition using iothread parameter causes live migration with copy storage to hang during or just before the final ram sync stage. Interestingly, having the scsi controller as a separate iothread does not trigger the issue. Version-Release number of selected component (if applicable): I can reproduce this on centos7 with qemu-ev and with centos 8: qemu-kvm-ev-2.12.0-33.1.el7_7.4.x86_64 qemu-kvm-2.12.0-65.module_el8.0.0+189+f9babebb.5.x86_64 Steps to Reproduce: 1. Create a definition with 1 iothread on the disk image: 2. Issue a live migrate request like: virsh migrate --live --copy-storage-all vm qemu+tcp://remote/system 3. Live migrate on source copies storage and then hangs at 80-99%, I guess during the ram copy phase. Keeping exactly the same config but without the iothread on the disk driver has successful migrations every time. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1859418/+subscriptions
[Bug 1859418] Re: disk driver with iothread setting hangs live migrations
I will try the newest version as you suggest. However please note that this is a redhat/centos 2.12 version which means it has a load of the newest patches on it so probably closer to a 4-series than real 2.12... Mark -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1859418 Title: disk driver with iothread setting hangs live migrations Status in QEMU: Incomplete Bug description: Per report raised at https://bugzilla.redhat.com/show_bug.cgi?id=1790093 Description of problem: A disk driver definition using iothread parameter causes live migration with copy storage to hang during or just before the final ram sync stage. Interestingly, having the scsi controller as a separate iothread does not trigger the issue. Version-Release number of selected component (if applicable): I can reproduce this on centos7 with qemu-ev and with centos 8: qemu-kvm-ev-2.12.0-33.1.el7_7.4.x86_64 qemu-kvm-2.12.0-65.module_el8.0.0+189+f9babebb.5.x86_64 Steps to Reproduce: 1. Create a definition with 1 iothread on the disk image: 2. Issue a live migrate request like: virsh migrate --live --copy-storage-all vm qemu+tcp://remote/system 3. Live migrate on source copies storage and then hangs at 80-99%, I guess during the ram copy phase. Keeping exactly the same config but without the iothread on the disk driver has successful migrations every time. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1859418/+subscriptions
[Bug 1859418] Re: disk driver with iothread setting hangs live migrations
Initially I suspected that https://lists.gnu.org/archive/html/qemu- devel/2020-01/msg03048.html may have addressed this issue, but I think because you're not using backup it might not. ...Oh, qemu 2.12 is *quite old* and not supported upstream anymore. Do you have the ability to test on a more modern QEMU version? If not, I might need to redirect you back to the RH Bugzilla for issues with the stable version they ship for RH/CentOS. I don't want to play bug tracker pingpong with you, so I'll leave this issue open (but marked "incomplete") and wait for a reply. --js ** Changed in: qemu Status: New => Incomplete -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1859418 Title: disk driver with iothread setting hangs live migrations Status in QEMU: Incomplete Bug description: Per report raised at https://bugzilla.redhat.com/show_bug.cgi?id=1790093 Description of problem: A disk driver definition using iothread parameter causes live migration with copy storage to hang during or just before the final ram sync stage. Interestingly, having the scsi controller as a separate iothread does not trigger the issue. Version-Release number of selected component (if applicable): I can reproduce this on centos7 with qemu-ev and with centos 8: qemu-kvm-ev-2.12.0-33.1.el7_7.4.x86_64 qemu-kvm-2.12.0-65.module_el8.0.0+189+f9babebb.5.x86_64 Steps to Reproduce: 1. Create a definition with 1 iothread on the disk image: 2. Issue a live migrate request like: virsh migrate --live --copy-storage-all vm qemu+tcp://remote/system 3. Live migrate on source copies storage and then hangs at 80-99%, I guess during the ram copy phase. Keeping exactly the same config but without the iothread on the disk driver has successful migrations every time. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1859418/+subscriptions
