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authorChristian Krinitsin <mail@krinitsin.com>2025-06-01 21:35:14 +0200
committerChristian Krinitsin <mail@krinitsin.com>2025-06-01 21:35:14 +0200
commit3e4c5a6261770bced301b5e74233e7866166ea5b (patch)
tree9379fddaba693ef8a045da06efee8529baa5f6f4 /gitlab/issues_text/target_missing/host_missing/accel_missing/1569
parente5634e2806195bee44407853c4bf8776f7abfa4f (diff)
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-NVMe FS operations hang after suspending and resuming both guest and host
-Description of problem:
-Hello and thank you for your work on QEMU!
-
-Using the NVMe driver with my Seagate FireCuda 530 2TB M.2 works fine until I encounter this problem, which is reliably reproducible for me.
-
-When I suspend the guest and then suspend (s2idle) my host all is well until I resume the guest (manually with `virsh dompmwakeup $VMNAME`, after the host has resumed). Although the guest resumes and is interactive, it seems that anything involving filesystem operations hang forever and do not return.
-
-Suspending and resuming the Linux guest seems to work perfectly if I don't suspend/resume the host.
-
-Ultimately what I'm wanting to do is share the drive between VMs with qemu-storage-daemon. I can reproduce the problem in that scenario in much the same way. Using PCI passthrough with the same VM and device works fine and doesn't exhibit this problem.
-
-Hopefully that's clear enough - let me know if there's anything else I can provide.
-Steps to reproduce:
-1. Create a VM with a dedicated NVMe disk.
-2. Boot an ISO and install to the disk.
-3. Verify that suspend and resume works when not suspending the host.
-4. Suspend the guest.
-5. Suspend the host.
-6. Wake the host.
-7. Wake the guest.
-8. Try just about anything that isn't likely already cached somewhere: `du -s /etc`.
-Additional information:
-I've attached the libvirt domain XML[1] and libvirtd debug logs for QEMU[2] ("1:qemu") that covers suspending the guest & host, resuming host & guest and doing something to cause a hang. I tried to leave enough time afterwards for any timeout to occur.
-
-1. [nvme-voidlinux.xml](/uploads/1dea47af096ce58175f7aa526eca455e/nvme-voidlinux.xml)
-2. [nvme-qemu-debug.log](/uploads/42d3bed456a795069023a61d38fa5ccd/nvme-qemu-debug.log)