linux-kernel - Re: [PATCH v3 00/10] Add tegra30 support for secondary cores

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Date:	Thu, 1 Mar 2012 16:35:13 +0200
From:	Peter De Schrijver <pdeschrijver@...dia.com>
To:	Stephen Warren <swarren@...dia.com>
CC:	Russell King <linux@....linux.org.uk>,
	Gary King <gking@...dia.com>, "Arnd Bergmann" <arnd@...db.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	Colin Cross <ccross@...roid.com>,
	"Olof Johansson" <olof@...om.net>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v3 00/10] Add tegra30 support for secondary cores

On Thu, Mar 01, 2012 at 12:42:11PM +0100, Peter De Schrijver wrote:
> On Wed, Feb 29, 2012 at 11:38:16PM +0100, Stephen Warren wrote:
> > Peter De Schrijver wrote at Wednesday, February 29, 2012 8:42 AM:
> > > On Wed, Feb 15, 2012 at 10:27:43PM +0100, Stephen Warren wrote:
> > > > Peter De Schrijver wrote at Thursday, February 09, 2012 4:48 PM:
> > > > > This patchset introduces support for secondary cores on tegra30. It also
> > > > > introduces some functions for the flowcontroller and adds basic support for
> > > > > tegra30 powerdomains.
> > > >
> > > > The code looks fine to me. I do notice the following when running
> > > > "shutdown -h now":
> > > >
> > > > [   27.762124] SMP: failed to stop secondary CPUs
> > 
> > I can't seem to reproduce this at all on next-20120229 anymore. What
> > kind of repro frequency are you seeing, and does it get fixed if you
> > update to that baseline?
> > 
> 
> I see it abount once every 3 reboots. I have a an expect script which
> automates the test. I haven't tried with next-20120229 yet.
> 
> > (I tried 20 times with shutdown, and 15 of them I reverted all the CPU
> > and cache errata in case they affected the issue at all)

Tried it with next-20120229 and it works fine here. I also noticed
next-20120229 does not have https://lkml.org/lkml/2012/1/31/444
which was part of the earlier tree I used for testing. So num_online_cpus()
recalculates the number of online CPUs everytime instead of trying to only
recalculate it when there is a change.

Cheers,

Peter.
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