I have a virtio disk mounted to a KVM guest, backed by an LVM logical volume. I increased the size of the logical volume with
lvresize on the KVM host machine.
Then I had to issue
virsh pool-refresh to make the KVM host aware of the volume size change. Now if I check the volume in
virt-manager, I see the correct disk size. But the guest OS still sees the disk by its old size no matter what.
How can I force the Linux kernel to rescan virtio disks without rebooting the guest?
The other solutions I found were not specific to virtio and they didn't work.
echo "- - -" > /sys/class/scsi_host/host0/scan should work for SCSI disks, but not virtio. Another tip,
echo 1 > /sys/block/vda/device/rescan doesn't work because the
rescan file doesn't exist.
So do you know about any virtio specific tip to have my virtio disk rescanned?