linux-kernel - Re: PROBLEM: 3.0-rc kernels unbootable since -rc3

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Message-ID: <20110711193021.GA2996@dumpdata.com>
Date:	Mon, 11 Jul 2011 15:30:22 -0400
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	xen-devel@...ts.xensource.com,
	julie Sullivan <kernelmail.jms@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: PROBLEM: 3.0-rc kernels unbootable since -rc3

> 
> Hmmm...  Does the stall repeat about every 3.5 minutes after the first stall?

Starting Configure read-only root support...
[   81.335070] INFO: rcu_sched_state detected stalls on CPUs/tasks: { 0} (detected by 3, t=60002 jiffies)
[   81.335091] sending NMI to all CPUs:
[  261.367071] INFO: rcu_sched_state detected stalls on CPUs/tasks: { 0} (detected by 3, t=240034 jiffies)
[  261.367092] sending NMI to all CPUs:
[  441.399066] INFO: rcu_sched_state detected stalls on CPUs/tasks: { 0} (detected by 3, t=420066 jiffies)
[  441.399089] sending NMI to all CPUs:

> 
> One thing to try would be to disable CONFIG_RCU_FAST_NO_HZ.  I wouldn't
> expect this to have any effect, but might be worth a try.  It is really

Did not help.
> intended for small battery-powered systems.
> 
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