| Date | Wed, 20 May 2020 22:14:53 +0200 | From | Peter Zijlstra <> | Subject | Re: [patch V6 01/37] tracing/hwlat: Use ktime_get_mono_fast_ns() |
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On Sat, May 16, 2020 at 01:45:48AM +0200, Thomas Gleixner wrote: > Timestamping in the hardware latency detector uses sched_clock() underneath > and depends on CONFIG_GENERIC_SCHED_CLOCK=n because sched clocks from that > subsystem are not NMI safe.
AFAICT that's not actually true, see commit:
1809bfa44e10 ("timers, sched/clock: Avoid deadlock during read from NMI")
that said, no objection to switching to ktime, people that run HPET clocks deserve all the pain and suffering available with those setups.
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