Hi:
I update our RHEL9 system to RHEL 9.4, which brings libvirt 10.0.
I try to calculate the cpu baseline for our two-node cluster with
command "virsh domcapabilities" then "virsh hypervisor-cpu-baseline
--migratable". the result has many cpu features begin with "vmx".
the test cluster h
Hi:
Jiri Denemark
> Interesting, hypervisor-cpu-baseline is supposed to provide an
> intersection of both CPU models. I wonder whether we have a bug
> somewhere, could you share the host-model definition from virsh
> domcapabilities from both hosts? The easiest way is running
>
> $ virsh domc
Hi:
> Jiri Denemark
> So could you also provide
> (1) the output of "virsh hypervisor-cpu-baseline" and
> (2) the element from the domain XML before it is started
> (3) and once it is running on the host from which migration fails?
sorry when I checked the vm with your theory(qemu will enab
Hi:
Jiri Denemark
> Oh, are you saying that a domain with such active XML cannot be migrated
> and you see these three features reported as missing? Could you please
> provide debug logs from virtqemud (or libvirtd if you're running
> monolithic daemon) from both sides of migration covering the f
Jiri Denemark
> > Thanks a lot for the logs. I think I know what the problem is and I'm
> > trying to reproduce locally and I hope to have a patch ready soon.
>
> This should be fixed by
> https://gitlab.com/libvirt/libvirt/-/commit/e622970c8785ec1f7e142d72f792d89f870e07d0
> and it will be include
Hi:
few years ago virtio-blk device was showing as hard-disk under
windows. recent years the driver change the device to show as
thin-provisioned disk. the change is good for ssd, but not so good
for raw hard-disk.
under windows server 2022 the default virtio-blk situation is quite
bad, ssd
Martin Kletzander
> > I wonder if libvirt would be changed to accept
> >"discard_granularity='0'" so the traditional hard-disk can be
> >recognized under windows again.
> >
>
> That should be possible, yes. Given the behaviour described above it
> should be done (although it feels like there
Andrea Bolognani
> I'd also be surprised if this only affected Windows. Wouldn't Linux
> guests likely see a similar change in how the device is presented?
I don't understand all the impact under windows. but defrag is the
obvious part. by default windows will do disk optimization weekly.
trim wa
