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Message-ID: <1357174163.10284.8.camel@gandalf.local.home> Date: Wed, 02 Jan 2013 19:49:23 -0500 From: Steven Rostedt <rostedt@...dmis.org> To: paulmck@...ux.vnet.ibm.com Cc: linux-kernel@...r.kernel.org, Ben Hutchings <ben@...adent.org.uk> Subject: Re: INFO: rcu_bh detected stall on CPU 3 (t=0 jiffies) On Wed, 2013-01-02 at 13:29 -0800, Paul E. McKenney wrote: > On Wed, Jan 02, 2013 at 03:56:30PM -0500, Steven Rostedt wrote: > > On Wed, Jan 02, 2013 at 08:09:20PM +0100, Ralf Hildebrandt wrote: > > > This happened of a virtual guest (Linux mail 3.2.0-35-virtual #55-Ubuntu SMP Wed Dec 5 18:02:05 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux) > > > > 3.2 is rather old and this looks to be a stock Ubuntu kernel. May want > > to file a Bugzilla (or whatever they call it) with them. > > > > > > > > Jan 2 13:24:08 mail kernel: [3531872.484283] INFO: rcu_bh detected stall on CPU 3 (t=0 jiffies) > > > > 0 jiffies? > > One possibility is that they are missing commit a10d206e (rcu: Fix > day-one dyntick-idle stall-warning bug), at least assuming that > CONFIG_PREEMPT=n. This went into 3.6, IIRC. If that does fix the issue, we probably should send that off to Ben for inclusion into 3.2 stable. Thanks, -- Steve > > Thanx, Paul > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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