id = 1193
title = "io_uring / iothread regression 7.1.0"
state = "closed"
created_at = "2022-09-04T21:43:28.056Z"
closed_at = "2022-10-31T10:11:49.427Z"
labels = ["Storage", "workflow::Triaged"]
url = "https://gitlab.com/qemu-project/qemu/-/issues/1193"
host-os = "Arch Linux"
host-arch = "x86_64"
qemu-version = "7.1.0"
guest-os = "All"
guest-arch = "x86-64"
description = """After upgrading to 7.1.0, some of my libvirt VM's failed to boot. I have narrowed down the issue to the combination of:

- io_uring
- iothread"""
reproduce = """1. set up a VM with iothread and io_uring
2. try to boot and watch it "hang""""
additional = """Here's the relevant command line from the libvirt log:
```
-blockdev '{"driver":"file","filename":"/mnt/data/VMs/Arch-Linux-x86_64-basic.qcow2","aio":"io_uring","node-name":"libvirt-1-storage","auto-read-only":true,"discard":"unmap"}' \\
-blockdev '{"node-name":"libvirt-1-format","read-only":false,"driver":"qcow2","file":"libvirt-1-storage","backing":null}' \\
-device '{"driver":"virtio-blk-pci","iothread":"iothread1","bus":"pci.4","addr":"0x0","drive":"libvirt-1-format","id":"virtio-disk0","bootindex":1 }' \\
```"""