Re: Drop WARN on AMD lack of perfctrs

From: Borislav Petkov
Date: Thu May 16 2013 - 17:34:33 EST

On Thu, May 16, 2013 at 10:55:58PM +0200, Robert Richter wrote:
> iirc the reason was the different msr range that is switched on fam15h
> with a different counter to counter msr offset of 2 instead of 1. The
> code relies on the assumption that the msrs exist on that cpu. Thus
> the warning if not. Also note that code may have changed in 3.10 in
> that area.

Stupid question: why is check_hw_exists() *after* the vendor-specific
counter detection code in init_hw_perf_events() even though it is
supposed to check whether hardware is emulated?


Sent from a fat crate under my desk. Formatting is fine.
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