linux-kernel - Re: rcu self-detected stall messages on OMAP3, 4 boards

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Message-ID: <alpine.DEB.2.00.1209230753120.7868@utopia.booyaka.com>
Date:	Sun, 23 Sep 2012 07:55:50 +0000 (UTC)
From:	Paul Walmsley <paul@...an.com>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
cc:	"Bruce, Becky" <bbruce@...com>,
	"Paul E. McKenney" <paul.mckenney@...aro.org>,
	"<linux-kernel@...r.kernel.org>" <linux-kernel@...r.kernel.org>,
	"<linux-omap@...r.kernel.org>" <linux-omap@...r.kernel.org>,
	"<linux-arm-kernel@...ts.infradead.org>" 
	<linux-arm-kernel@...ts.infradead.org>,
	"Hilman, Kevin" <khilman@...com>,
	"Shilimkar, Santosh" <santosh.shilimkar@...com>,
	"Hunter, Jon" <jon-hunter@...com>,
	"<snijsure@...d-net.com>" <snijsure@...d-net.com>,
	fweisbec@...il.com
Subject: Re: rcu self-detected stall messages on OMAP3, 4 boards

On Sat, 22 Sep 2012, Paul E. McKenney wrote:

> On Sat, Sep 22, 2012 at 10:25:59PM +0000, Paul Walmsley wrote:
> 
> > The recent tests here have been on Pandaboard, which is dual-CPU, but my 
> > recollection is that I also observed the warnings on a single-core 
> > Beagleboard.  Will re-test.
> 
> Anxiously awaiting the results.

The same problem exists on BeagleBoard XM (OMAP3730, single-core 
Cortex-A8):

   http://www.pwsan.com/omap/transcripts/20120922-beaglexm-rcu-stall-debug-pre-fix.txt

and the same patch fixes it:

   http://www.pwsan.com/omap/transcripts/20120922-beaglexm-rcu-stall-debug-post-fix.txt

Please feel free to update my Tested-by:, if you wish.

Tested-by: Paul Walmsley <paul@...an.com>  # OMAP3730, OMAP4430


- Paul
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