linux-kernel - Re: [PATCH V5 1/2] perf ignore LBR and extra

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Message-ID: <53C3DDBB.2000304@redhat.com>
Date:	Mon, 14 Jul 2014 15:40:11 +0200
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	"Liang, Kan" <kan.liang@...el.com>,
	Peter Zijlstra <peterz@...radead.org>
CC:	"andi@...stfloor.org" <andi@...stfloor.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>
Subject: Re: [PATCH V5 1/2] perf ignore LBR and extra_regs

Il 14/07/2014 15:36, Liang, Kan ha scritto:
>> > Kan Liang, what happens if CONFIG_PARAVIRT=y?  Do you get garbage or
>> > just no events reported?
>> >
> Guest rdmsr/wrmsr will eventually call rdmsr_safe/wrmsr_safe. They will handle the #GP. So there is no error report in guest.

Yeah, but what's the effect on the output of perf?

Paolo

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