[nova]is there support for discard/trim in virtio-blk?

Sven Kieske S.Kieske at mittwald.de
Fri Sep 3 08:15:51 UTC 2021

On Do, 2021-09-02 at 18:44 +0100, Sean Mooney wrote:
> although its not clear that libvirt was updated to support the virtio-blk support added in qemu 4.0.0 sicne the libvirt docs were not updated to refernce that.

Thanks for all the feedback and pointers! FWIW we were already aware of the discard=unmap option in libvirt, I should have mentioned that.

In the meantime I found this bugreport: https://bugzilla.redhat.com/show_bug.cgi?id=1672682

which seems to indicate that this indeed works in libvirt for virtio-blk.

So I will continue to figure out why this doesn't work as intended in our setup.

Mit freundlichen Grüßen / Regards

Sven Kieske
Systementwickler / systems engineer
Mittwald CM Service GmbH & Co. KG
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