Hi Andrei, On Sat, Nov 08, 2014 at 01:11:29PM +0300, Andrei Borzenkov wrote:

Last boot with 13.1 standard kernel (3.11.10-21):

ноя 07 16:15:08 opensuse kernel: tsc: Fast TSC calibration using PIT ноя 07 16:15:08 opensuse kernel: tsc: Detected 2394.016 MHz processor

First boot with 13.2 standard kernel (3.16.6-2):

ноя 08 10:22:48 opensuse kernel: tsc: Fast TSC calibration failed ноя 08 10:22:48 opensuse kernel: tsc: PIT calibration matches HPET. 1 loops ноя 08 10:22:48 opensuse kernel: tsc: Detected 2393.990 MHz processor

Does it possible you can check does this situation reproduced on mainline kernel v3.16 kernel? If yes, please check does it still happen on v3.18-rc kernel. If it can reproduce on mainline v3.16 and v3.18-rc kernel, please bisect patch between v3.11..v3.16. It's possible a patch causes Fast TSC calibration failed.

The net effect is probably the same (it apparently used PIT in the first case as well); but "Fast TSC calibration failed" is displayed on boot and is scary. Is it false positive in this case that can be silenced?

processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 23 model name : Intel(R) Core(TM)2 Duo CPU T8300 @ 2.40GHz stepping : 6 microcode : 0x60f -- To unsubscribe, e-mail: opensuse-kernel+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-kernel+owner@opensuse.org

Thanks a lot! Joey Lee -- To unsubscribe, e-mail: opensuse-kernel+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-kernel+owner@opensuse.org