Performing verification: First, reproducing on older kernel:
$ uname -rv 4.4.0-190-generic #220-Ubuntu SMP Fri Aug 28 23:02:15 UTC 2020 $ grep "clocksource" /etc/default/grub GRUB_CMDLINE_LINUX_DEFAULT="clocksource=tsc" $ cat /proc/cmdline BOOT_IMAGE=/boot/vmlinuz-4.4.0-190-generic root=UUID=f6c72a0a-003a-4b81-9550-ba49a547e32d ro clocksource=tsc $ cat /sys/devices/system/clocksource/clocksource0/current_clocksource kvm-clock kvm-clock is the default, even though we explicitly asked for tsc. We can reproduce. Now, I enabled -proposed and installed 4.4.0-191-generic: $ uname -rv 4.4.0-191-generic #221-Ubuntu SMP Fri Sep 18 13:34:04 UTC 2020 $ grep "clocksource" /etc/default/grub GRUB_CMDLINE_LINUX_DEFAULT="clocksource=tsc" $ cat /proc/cmdline BOOT_IMAGE=/boot/vmlinuz-4.4.0-191-generic root=UUID=f6c72a0a-003a-4b81-9550-ba49a547e32d ro clocksource=tsc $ cat /sys/devices/system/clocksource/clocksource0/current_clocksource tsc $ dmesg | grep defer [ 0.870439] clocksource: Override clocksource tsc is not currently HRT compatible - deferring We have our requested clocksource, tsc, and we did not need to force override the reliability checks from the watchdog. The kernel in -proposed, 4.4.0-191-generic, fixes the problem, and I am happy to mark the bug verified. ** Tags removed: verification-needed-xenial ** Tags added: verification-done-xenial -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1894591 Title: clock: overriding the clocksource should select the requested clocksource To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1894591/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
