Re: [v3] x86/tsc: Unset TSC_KNOWN_FREQ and TSC_RELIABLE flags on Intel Bay Trail SoC

From: Hans de Goede
Date: Fri Jan 24 2020 - 10:54:50 EST


Hi,

On 1/24/20 12:55 PM, Thomas Gleixner wrote:
Hans,

Hans de Goede <hdegoede@xxxxxxxxxx> writes:
On 1/24/20 9:35 AM, Thomas Gleixner wrote:
Where does that number come from? Just math?

Yes just math, but perhaps the Intel folks can see if they can find some
datasheet to back this up ?

Can you observe the issue on one of the machines in your zoo as well?

I haven't tried yet. Looking at the thread sofar the problem was noticed on
a system with a Celeron N2930, I don't have access to one of those, I
do have access to a system with a closely related N2840 I will give that
a try as well as see if I can reproduce this on one of the tablet
oriented Z3735x SoCs.

I'll report back when I have had a chance to test this.

Regards,

Hans