Date: Thu, 16 May 2013 23:34:20 +0200
From: Borislav Petkov <bp@alien8.de>
To: Robert Richter <rric@kernel.org>, Peter Zijlstra <peterz@infradead.org>
Cc: Josh Boyer <jwboyer@redhat.com>, Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@ghostprotocols.net>, x86@kernel.org,
        linux-kernel@vger.kernel.org, gleb@redhat.com
Subject: Re: Drop WARN on AMD lack of perfctrs
Message-ID: <20130516213420.GB31393@pd.tnic>
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 <20130516175557.GC18325@hansolo.jdub.homelinux.org>
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 <20130516205558.GE8356@rric.localhost>
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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?

-- 
Regards/Gruss,
    Boris.

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