Re: [PATCH] i386 tsc: remove xtime_lock'ing around cpufreq notifier

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Andrew Morton wrote:
> blktrace.  I've seen a couple of trace/debug-style things which use
> sched_clock for timestamping event collection. I think lttng does exotic
> things with TSCs, performing private skew correction, although that might
> have changed now.

I'm not worried about things using the tsc directly.  But since we hook
into sched_clock, anyone using it is going to get the pv_ops backend's
behaviour, which is targeted at making the scheduler work properly
rather than all these secondary uses.

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