Date: Tue, 14 Mar 2006 15:45:45 -0800
From: Andrew Morton <akpm@osdl.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: rdunlap@xenotime.net, rmk+serial@arm.linux.org.uk,
       linux-kernel@vger.kernel.org
Subject: Re: soft lockup in serial8250_console_write(?)
Message-Id: <20060314154545.060fac2c.akpm@osdl.org>
In-Reply-To: <20060314232515.GA21782@elte.hu>
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	<20060314214049.GA29536@elte.hu>
	<20060314151812.2779ed4b.rdunlap@xenotime.net>
	<20060314232515.GA21782@elte.hu>
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Ingo Molnar <mingo@elte.hu> wrote:
>
> 
> * Randy.Dunlap <rdunlap@xenotime.net> wrote:
> 
> > > > This function calls wait_for_xmitr() [inline], which in worst case can 
> > > > spin for 1.010 seconds.  Could this be the cause of a soft lockup?
> > > 
> > > hm, it shouldnt cause that. Could you try the attached patch [which is 
> > > the next-gen softlockup detector], do you get the message even with that 
> > > one applied?
> > 
> > 5/5 good boots with your new patch.
> > 5/5 soft lockups without it.
> > 
> > Is this scheduled for post-2.6.16 ?
> 
> yes, in theory. Andrew?
> 

Which?  timer-irq-driven-soft-watchdog-cleanups.patch?  Yup.
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