Public bug reported:
update-grub (grub-mkconfig) is slow to complete when there is some write
disk activity on 1 or more KVM guests configure with a raw LVM2 backend
+ Virtio Bus type.
Situation ONLY reproducible with "VirtIO", thus not reproducible with
Bus type : IDE, SCSI, ... using the same exact Hypervisor and KVM guest.
(Just changing the bus type at the VM level)
VirtIO configuration :
<disk type='block' device='disk'>
<driver name='qemu' type='raw' cache='none' io='native'/>
<source dev='/dev/mapper/vg02-labmysql01'/>
<target dev='vda' bus='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
</disk>
Additional note :
* Reproducible with upstream kernel v4.10
** Affects: qemu (Ubuntu)
Importance: Undecided
Status: New
** Tags: sts
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https://bugs.launchpad.net/bugs/1666555
Title:
update-grub slow with raw LVM source dev + VirtIO bus
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