| 2023-06-06 17:23:09 |
Gorka Eguileor |
description |
Nova incorrectly sets the libvirt XML after an online volume migration when the source is a backend that doesn’t support discard (Cinder doesn't return `discard: true` in the connection dictionary) to one that does.
It seem like Nova doesn't rebuild the disk XML, so it's missing the discard=unmap that should have for the new volume.
This bug results in the trimming/unmapping commands not working on the new volume until the next time Nova connects the volume.
For example an instance reboot will not be enough, but a shelve and unshelve will do the trick and fstrim will work again. |
Nova incorrectly sets the libvirt XML after an online volume migration (swap volume) when the source is a backend that doesn’t support discard (Cinder doesn't return `discard: true` in the connection dictionary) to one that does.
It seem like Nova doesn't rebuild the disk XML, so it's missing the discard=unmap that should have for the new volume.
This bug results in the trimming/unmapping commands not working on the new volume until the next time Nova connects the volume.
For example an instance reboot will not be enough, but a shelve and unshelve will do the trick and fstrim will work again. |
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