In the provided xml, the following chunk is present: ``` <driver name='qemu' type='qcow2' cache='none' io='native' discard='unmap'/> ```
cache='none': Translates to bypassing the host page cache (cache.direct=on or O_DIRECT) while retaining a writeback-like behavior for guest notifications, meaning I/O happens directly between userspace buffers and the storage device so cache=none translates to -cache.direct=on on QEMU, and with that in mind this sounds like what we are seeing here - https://gitlab.com/qemu- project/qemu/-/work_items/3521 this kernel bit popped up in my research too - https://lore.kernel.org/all/[email protected]/ . This is the referenced commit in that post https://github.com/torvalds/linux/commit/22ec71615d82 . I'm adding a bug task for qemu and getting more (qemu) experienced eyes on this. ** Also affects: qemu (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2169551 Title: VMs on arm on ephemeral fails to boot To manage notifications about this bug go to: https://bugs.launchpad.net/charm-nova-compute/+bug/2169551/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
