From: Michael Ellerman <mpe@ellerman•id.au>
To: Peter Zijlstra <peterz@infradead•org>
Cc: Michael Neuling <mikey@neuling•org>,
Benjamin Herrenschmidt <benh@kernel•crashing.org>,
linuxppc-dev@ozlabs•org
Subject: Re: question on FSL_EMB perf
Date: Thu, 11 Jun 2015 16:00:08 +1000 [thread overview]
Message-ID: <1434002408.28304.4.camel@ellerman.id.au> (raw)
In-Reply-To: <20150610114126.GN19282@twins.programming.kicks-ass.net>
On Wed, 2015-06-10 at 13:41 +0200, Peter Zijlstra wrote:
> Hi Mike, Ben,
>
> I just noticed:
>
> arch/powerpc/Kconfig: select HAVE_PERF_EVENTS_NMI if PPC64
We actually only added that recently, in c54b2bf1b5e9 "powerpc: Add ppc64 hard
lockup detector support".
AFAICS it doesn't actually have anything to do with the NMI behaviour of the
perf interrupt. It controls whether the hardlockup detector is enabled and/or
the oprofile NMI timer.
cheers
prev parent reply other threads:[~2015-06-11 6:00 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-10 11:41 question on FSL_EMB perf Peter Zijlstra
2015-06-10 19:17 ` Scott Wood
2015-06-10 19:27 ` Peter Zijlstra
2015-06-10 20:13 ` Scott Wood
2015-06-10 21:14 ` Peter Zijlstra
2015-06-10 21:28 ` Scott Wood
2015-06-11 6:00 ` Michael Ellerman [this message]
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