This bug is awaiting verification that the linux-mtk/5.15.0-1030.34 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-jammy-linux-mtk' to 'verification-done-jammy- linux-mtk'. If the problem still exists, change the tag 'verification- needed-jammy-linux-mtk' to 'verification-failed-jammy-linux-mtk'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: kernel-spammed-jammy-linux-mtk-v2 verification-needed-jammy-linux-mtk -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/2047382 Title: Hotplugging SCSI disk in QEMU VM fails Status in linux package in Ubuntu: In Progress Status in linux source package in Focal: Fix Released Status in linux source package in Jammy: Fix Released Status in linux source package in Lunar: Fix Committed Status in linux source package in Mantic: Fix Released Status in linux source package in Noble: In Progress Bug description: [Impact] Hot-plugging SCSI disks for QEMU VMs booting with UEFI and using guest kernels >= 6.5 might be broken. The inconsistency suggests a potential race condition. [Fix] Reverting the two specified commits appears to restore reliability. ========== cc22522fd55e2 PCI: acpiphp: Use pci_assign_unassigned_bridge_resources() only for non-root bus 40613da52b13f PCI: acpiphp: Reassign resources on bridge if necessary ========== Upstream has resolved the issue by reverting both commits through a commit placed below. ========== 5df12742b7e3a Revert "PCI: acpiphp: Reassign resources on bridge if necessary ========== [Test Plan] 1. Create a VM virt-install --name scsi_test --memory 2048 --vcpus 2 --boot uefi --disk path=/home/ubuntu/mantic-server-cloudimg-amd64.img,size=20,format=qcow2,bus=virtio -os-variant=ubuntu18.04 --graphics spice --network bridge=virbr0 2. Prepare two XMLs for adding two disk devices # cat disk_X.xml <disk type='file' device='disk'> <driver name='qemu' type='raw'/> <source file='XXX.img'/> <target dev='vdX' bus='virtio'/> </disk> 3. Hotplug disks and check for success virsh attach-device scsi_test disk_X.xml [Where problems could occur] The patch reverts two commits that previously addressed long-standing issues related to hotplugging devices with large BARs. While this reversion may reintroduce legacy issues, it does not introduce new problems. The associated risks are deemed low, making it worthwhile to address timing issues during the hotplugging of SCSI disks in QEMU VM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2047382/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
