On Mon, 2014-03-10 at 11:04 +0100, Julian Wollrath wrote: > on a Thinkpad x121e (AMD E-450 APU) with version 3.13.5 and earlier of > the kernel I get: > [...] > [ 0.000000] tsc: Fast TSC calibration using PIT > [ 0.001000] tsc: Detected 1646.619 MHz processor > [ 0.000004] Calibrating delay loop (skipped), value calculated using > timer frequency.. 3293.23 BogoMIPS (lpj=1646619) > [...] > > > but starting with v3.14-rc1 the fast TSC calibration fails: > [...] > [ 0.000000] tsc: Fast TSC calibration failed > [ 0.000000] tsc: PIT calibration matches HPET. 1 loops > [ 0.000000] tsc: Detected 1646.490 MHz processor > [...] > > If you need more information, please do not hesitate to ask.
I submitted a patch to downgrade the "Fast TSC calibration failed" message to KERN_INFO level, see https://lkml.org/lkml/2012/9/26/131 . That patch was basically ignored. I've carried it locally ever since. So the error need not be v3.14-rc1 specific. But perhaps something changed in v3.14-rc1 that makes it easier to trigger that error. I haven't checked. (I wrote some notes on this issue in https://lkml.org/lkml/2012/9/24/221 , perhaps they might be of help.) Paul Bolle -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/