I don't see an improvement using io='threads' nor 'default', as I previously tested it.
I didn't try the cache option as in general 'none' is the best choice, but after trying with 'writethrough' I can tell it helps, by cutting half of waiting time. # cache='none' $ time update-grub Generating grub configuration file ... Found linux image: /boot/vmlinuz-4.4.0-62-generic Found initrd image: /boot/initrd.img-4.4.0-62-generic done real 0m14.703s user 0m0.280s sys 0m0.300s # cache=writethrough $ time update-grub Generating grub configuration file ... Found linux image: /boot/vmlinuz-4.4.0-62-generic Found initrd image: /boot/initrd.img-4.4.0-62-generic done real 0m7.123s user 0m0.376s sys 0m0.304s - Eric -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1666555 Title: update-grub slow with raw LVM source dev + VirtIO bus To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1666555/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
