Steven Rostedt <[email protected]> writes: > On Tue, 19 May 2020 23:45:10 +0200 > Thomas Gleixner <[email protected]> wrote: > >> >> @@ -165,20 +155,22 @@ void trace_hwlat_callback(bool enter) >> >> * Used to repeatedly capture the CPU TSC (or similar), looking for >> >> potential >> >> * hardware-induced latency. Called with interrupts disabled and with >> >> * hwlat_data.lock held. >> >> + * >> >> + * Use ktime_get_mono_fast() here as well because it does not wait on the >> >> + * timekeeping seqcount like ktime_get_mono(). >> > >> > When doing a "git grep ktime_get_mono" I only find >> > ktime_get_mono_fast_ns() (and this comment), so I don't know what to >> > compare >> > that to. Did you mean another function? >> >> Yeah. I fatfingered the comment. The code uses ktime_get_mono_fast_ns(). > > Well, I assumed that's what you meant with "ktime_get_mono_fast()" but I > don't know what function you are comparing it to that waits on the seqcount > like "ktime_get_mono()" as there is no such function.
Gah. ktime_get_mono_fast_ns() and ktime_get() of course.
