Re: [PATCH v6 1/4] sched/clock: interface to allow timestamps early in boot

Pasha Tatashin
2017-09-27T13:17:16Z

Hi Peter,

I am totally happy with removing notsc. This certainly simplifies the
sched_clock code. Are there any issues with removing existing kernel
parameters that I should be aware of?

Thank you,
Pasha

On 09/27/2017 09:10 AM, Peter Zijlstra wrote:
> On Wed, Sep 27, 2017 at 02:58:57PM +0200, Peter Zijlstra wrote:
>> (we're violating "notsc" in any case and really should kill that
>> option).
>
> Something like so; in particular simple_udelay_calibrate() will issue
> RDTSC _way_ early, so there is absolutely no point in then pretending we
> can't use RDTSC for sched_clock.
>