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

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Message-ID: <20130910074550.GE17483@pompeji.miese-zwerge.org>
Date:	Tue, 10 Sep 2013 09:45:50 +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,

On Mon, Sep 09, 2013 at 03:27:51PM -0700, Paul E. McKenney wrote:
> On Mon, Sep 09, 2013 at 11:58:36PM +0200, Jochen Striepe wrote:
> > I just got this on 3.10.11 on the same machine. Could that be
> > related?
> 
> Several people helped track down another source of spurious stall
> warnings on large systems, please see below for the patch.
[...]
> This is quite rare, but apparently occurs deterministically
> on systems with about 6TB of memory.

Hmm. My system is an ASUS Eee PC netbook with a total of 2G memory.
The latest stall was just when booting, while /dev was to be filled
by udev (and taking a really long time on that). So I think this
patch should not help at my machine, right?

I tried to reproduce the stall, but without success. Is there anything
that could help reproducing?

Best greetings,
Jochen.
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