Re: [PATCH] x86/Hyper-V: Fix hv sched clock function return wrong time unit

Tianyu Lan ltykernel@gmail.com writes:

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@@ -398,7 +399,8 @@ static u64 notrace read_hv_clock_msr_cs(struct clocksource *arg) static u64 read_hv_sched_clock_msr(void) {

• return read_hv_clock_msr() - hv_sched_clock_offset;

• return (read_hv_clock_msr() - hv_sched_clock_offset)

• * (NSEC_PER_SEC / HV_CLOCK_HZ);
  

  }

kvmclock seems to have the same (pre-patch) code ...

kvm sched clock gets time from pvclock_clocksource_read() and the time unit is nanosecond. So there is such issue in KVM code.

Ah, true, kvmclock is always 1Ghz so it's reading 'naturally' converts to ns.