Re: [PATCH v2 1/3] x86, sched: check for counters overflow in frequency invariant accounting

[Peter Zijlstra]

On Sun, May 31, 2020 at 08:24:51PM +0200, Giovanni Gherdovich wrote:

Hi Giovanni!

> +error:
> +	pr_warn("Scheduler frequency invariance went wobbly, disabling!\n");
> +	schedule_work(&disable_freq_invariance_work);
> +}

I'm getting reports that we trigger this on resume. Would it make sense
to hook into tsc_{save,restore}_sched_clock_state() (or somewhere near
there) to reset the state (basically call init_counter_refs() again to
ensure we're not having to deal with crazy ?