Messages in this thread | | | Date | Tue, 22 Nov 2011 12:14:22 +0000 | From | Will Deacon <> | Subject | Re: [RFC][PATCH 2/6] perf, arch: Rework perf_event_index() |
| |
On Tue, Nov 22, 2011 at 12:00:33PM +0000, Oleg Strikov wrote: > Also, please do not forget that enabling the userspace access to the counters may not only create some problems > to the profilers like Perf/OProfile but could also trash the kernel with the interrupts.
Actually, the registers for controlling interrupts aren't visible to userspace with ARMv7. On ARMv6, this is a different story, which is why I didn't mention doing this for older platforms earlier :)
Anyway, this thread has digressed now so you can always jump onto the ARM list (linux-arm-kernel) if you want to discuss this more.
Cheers,
Will
| |