Messages in this thread | | | Date | Fri, 11 Jan 2019 21:43:37 +0100 (CET) | From | Thomas Gleixner <> | Subject | Re: tsc: Fast TSC calibration failed with AMD B350M/Ryzen 3 2200G |
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Paul,
On Mon, 7 Jan 2019, Paul Menzel wrote: > On 01/07/19 16:24, Thomas Gleixner wrote: > >> Linux 4.19.13 from Debian Sid/unstable logs the message below on the board MSI > >> MS-7A37/B350M MORTAR with the processor AMD Ryzen 3 2200G. > >> > >> As a result, the early time stamps do not seem to be working. > > > >>> [ 0.000000] DMI: Micro-Star International Co., Ltd. MS-7A37/B350M MORTAR (MS-7A37), BIOS 1.I0 11/06/2018 > >>> [ 0.000000] tsc: Fast TSC calibration failed > > > > And the further boot log says: > > > > [ 0.036000] tsc: Unable to calibrate against PIT > > [ 0.036000] tsc: using HPET reference calibration > > [ 0.036000] tsc: Detected 3500.117 MHz processor > > > > So the quick calibration in early boot fails because the PIT seems not to > > do what the kernel expects. Nothing we can cure :( > > I see. Can AMD confirm that this is the expected behavior? If yes, should > the fast TSC calibration be skipped on these devices?
It should work and we really don't want to add cpu family/model based decisions whether we invoke something or not. Those tables are stale before they hit mainline.
Thanks,
tglx
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