I reopened and assigned rafael to bug 1805256 to re-evaluate this. I've taken over this bug to push a revert to Bionic asap. SRU Template added to the bug here.
Since it is a plain revert with no other changes in between this (other than the changelog) matches the former 1%2.11+dfsg-1ubuntu7.26. Therefore I'll skip a review cycle in the Team and directly upload it to -unapproved for the SRU Team to look at it. ** Description changed: [Impact] - * Despite quite a bunch of regression testing, explicit testing by - different parties and extra time in -proposed the fix to bug 1805256 - caused a regression for other configurations. + * Despite quite a bunch of regression testing, explicit testing by + different parties and extra time in -proposed the fix to bug 1805256 + caused a regression for other configurations. - * We will upload version .28 which essentially is a revert of .27 to - provide us the time to revisit the fix for bug 1805256 again and not - being forced to rush this cleanup. - + * We will upload version .28 which essentially is a revert of .27 to + provide us the time to revisit the fix for bug 1805256 again and not + being forced to rush this cleanup. [Test Case] - * Ensure that the revert really avoids the regression to iothread - handling. Start a guest with virtio-scsi + iothreads. + * Ensure that the revert really avoids the regression to iothread + handling. Start a guest with virtio-scsi + iothreads. <domain type='kvm'> ... <iothreads>1</iothreads> ... <controller type='scsi' index='0' model='virtio-scsi'> <driver iothread='1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </controller> ... </domain> [Regression Potential] - * The regression already happened despite all measures. This is just the - revert. So other than any issues creeping in at build time (e.g. - toolchain changes, which I didn't see any) this should eventually match - the former .27 - https://launchpad.net/ubuntu/+source/qemu/1:2.11+dfsg-1ubuntu7.27 + * The regression already happened despite all measures. This is just the + revert. So other than any issues creeping in at build time (e.g. + toolchain changes, which I didn't see any) this should eventually match + the former .27 + https://launchpad.net/ubuntu/+source/qemu/1:2.11+dfsg-1ubuntu7.27 [Other Info] - - * The formerly fixed bug 1805256 will re-open due to this and be worked on - again. + + * The formerly fixed bug 1805256 will re-open due to this and be worked on + again. + * When comparing for Delta I recommend comparing to 1:2.11+dfsg- + 1ubuntu7.26 as that will show that all but changelog entries are gone + and nothing else changed. --- - - After a recent upgrade I can't start a Windows 10 VM anymore, QEMU crashes with the error message: + After a recent upgrade I can't start a Windows 10 VM anymore, QEMU + crashes with the error message: error: Failed to start domain win10 error: internal error: qemu unexpectedly closed the monitor: qemu-system-x86_64: /build/qemu-v_zvmu/qemu-2.11+dfsg/util/aio-posix.c:592: aio_poll: Assertion `in_aio_context_home_thread(ctx)' failed. I was able to resurrect the VM by removing the iothread-related elements from the domain definition: <domain type='kvm'> ... <iothreads>1</iothreads> ... <controller type='scsi' index='0' model='virtio-scsi'> <driver iothread='1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </controller> ... </domain> The domain XML is attached. I'm using virtio-scsi and not virtio-blk because I use trimming to keep my QCOW image small(er). Would be great if I could continue to use this with iothreads enabled. $ lsb_release -rd Description: Ubuntu 18.04.4 LTS Release: 18.04 $ apt-cache policy qemu-kvm qemu-kvm: Installiert: 1:2.11+dfsg-1ubuntu7.27 Installationskandidat: 1:2.11+dfsg-1ubuntu7.27 Versionstabelle: *** 1:2.11+dfsg-1ubuntu7.27 500 500 http://de.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages 100 /var/lib/dpkg/status 1:2.11+dfsg-1ubuntu7.26 500 500 http://security.ubuntu.com/ubuntu bionic-security/main amd64 Packages 1:2.11+dfsg-1ubuntu7 500 500 http://de.archive.ubuntu.com/ubuntu bionic/main amd64 Packages ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: qemu-kvm 1:2.11+dfsg-1ubuntu7.27 ProcVersionSignature: Ubuntu 4.15.0-108.109-generic 4.15.18 Uname: Linux 4.15.0-108-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.9-0ubuntu7.15 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Sun Jun 28 13:05:17 2020 InstallationDate: Installed on 2019-10-03 (268 days ago) InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) KvmCmdLine: COMMAND STAT EUID RUID PID PPID %CPU COMMAND MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M. ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=de_DE.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-108-generic root=UUID=d40a86d5-61ae-486e-8ddf-9581c538d64e ro quiet splash vt.handoff=1 SourcePackage: qemu UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 07/13/2011 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: P1.60 dmi.board.name: Z68 Pro3 dmi.board.vendor: ASRock dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: To Be Filled By O.E.M. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP1.60:bd07/13/2011:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnZ68Pro3:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.: dmi.product.family: To Be Filled By O.E.M. dmi.product.name: To Be Filled By O.E.M. dmi.product.version: To Be Filled By O.E.M. dmi.sys.vendor: To Be Filled By O.E.M. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1885419 Title: QEMU crash using virtio-scsi with iothread To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1885419/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
