linux-kernel - Re: [PATCH v3 4/4] nmi_backtrace: generate one-line reports for idle cpus

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Message-ID: <20160323075359.GH6356@twins.programming.kicks-ass.net>
Date:	Wed, 23 Mar 2016 08:53:59 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:	Chris Metcalf <cmetcalf@...lanox.com>,
	Russell King <linux@....linux.org.uk>,
	Thomas Gleixner <tglx@...utronix.de>,
	Aaron Tomlin <atomlin@...hat.com>,
	Ingo Molnar <mingo@...hat.com>, Andrew Morton <akpm@...l.org>,
	Daniel Thompson <daniel.thompson@...aro.org>, x86@...nel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-arch@...r.kernel.org
Subject: Re: [PATCH v3 4/4] nmi_backtrace: generate one-line reports for idle
 cpus

On Wed, Mar 23, 2016 at 01:50:00AM +0100, Rafael J. Wysocki wrote:

> > > Well, what about intel_idle_freeze()?  Or do we not care?
> > 
> > I argued against it; when you're suspended the NMI watchdog is stopped
> > too.
> 
> Is it also stopped for suspend-to-idle?  I'm not sure about that.
> 
> Where do I need to look to find out?

Hmm I have memories of writing a patch to that effect when we were
starting with that suspend-to-idle stuff, because people didn't like
being woken up all the time.

But now that I look I cannot find it either..