Re: [RFC patch 04/15] get_cycles() : powerpc64 HAVE_GET_CYCLES(update)
From: Paul Mackerras
Date: Thu Oct 16 2008 - 21:13:41 EST
Mathieu Desnoyers writes:
> Do you know if mtfb implies an instruction synchronization (isync) ? I
It doesn't.
> think that if it does not, the new get_cycles_barrier() might have to be
> used at some locations in the kernel code if more precise timestamp
> order is required.
OK. I'll let you figure out where. :)
Paul.
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