On 20.05.2022 08:52, Fabian Ebner wrote:
Am 19.05.22 um 15:35 schrieb Matthias Heiserer:
On 18.05.2022 11:40, Fabian Ebner wrote:
Am 12.05.22 um 11:24 schrieb Matthias Heiserer:
Existing disks are not changed by this.
Especially in benchmarks, iothreads significantly improve IO
performance.
Signed-off-by: Matthias Heiserer <m.heise...@proxmox.com>
---
Changes from v2:
* also check iothread when adding a disk to an existing VM and
scsi single
* use bind instead of hardcoded true
This feels like to much automagic to me, because changes to the checkbox
(even if checkbox is for a virtio disk) will change the controller type
and vice versa. This also makes it impossible to only set iothread on
certain disks or use the "Virtio SCSI single" controller type without
setting iothread.
Is it possible to instead have the checkbox be invalid with an
appropriate error for the user when it's a bad configuration?
Changes to the checkbox already change the Controller to Virtio SCSI
(single), regardless of what was selected before. Anyways, the automatic
change only happens in the wizard.
You're right, and I'd argue that the current behavior isn't ideal either
;). I guess with only a single scsi disk it makes sense to automatically
switch, because the iothread setting would be invalid otherwise. It also
happens for a virtio disk though, where the scsi controller type isn't
even visible in the disk edit tab. One can still argue that it's just
not relevant there. But we switched to using a multi-disk panel some
time ago, and in that context it's just confusing, because changes to
each iothread checkbox will affect the scsi controller type.
I send in a v4, please take a look.
There is still no warning for bad configurations, rather, I removed the
bin. Now, you can configure all disks individually, with SCSI single and
iothread enabled still being the default. The iothread are still binded
to the scsi controller, so if someone were to change some iothread
settings, go back to the controller, set it to something other than SCSI
single, then change it back to scsi single, the iothread configuration
would be lost/all enabled.
Please let me know what you think about it, if it's closer to what you
have in mind.
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