linux-kernel - Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

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Date:	Mon, 23 Sep 2013 18:49:31 +0200
From:	Jochen Striepe <jochen@...ot.escape.de>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

	Hello again,

On Sat, Sep 14, 2013 at 01:28:34PM +0200, Jochen Striepe wrote:
> On Mon, Sep 09, 2013 at 03:27:51PM -0700, Paul E. McKenney wrote:
> > rcu: Reject memory-order-induced stall-warning false positives
> 
> I run this patch on top of 3.10.11 vanilla since Wednesday, so far
> without any further stalls, on light to heavy loads. Works smooth
> as pie.

Hmm, perhaps it is not as easy as I thought. On exactly this machine
with exactly this kernel (3.10.11 vanilla with your patch from this
thread), some minutes ago another one came up. The system should have
been mostly idle at that moment. Dmesg appended ... do you need
anything else to have an educated guess? I waited 10 minutes after
the stall message (following your earlier advise), but no further
dmesg lines appeared after that.

Best greetings,
Jochen.

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