linux-kernel - Re: RCU qsmask !=0 warnings on large-SMP...

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Message-ID: <20120131173859.GD2391@linux.vnet.ibm.com>
Date:	Tue, 31 Jan 2012 09:38:59 -0800
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Steffen Persvold <sp@...ascale.com>
Cc:	Daniel J Blueman <daniel@...ascale-asia.com>,
	Dipankar Sarma <dipankar@...ibm.com>,
	linux-kernel@...r.kernel.org, x86@...nel.org
Subject: Re: RCU qsmask !=0 warnings on large-SMP...

On Tue, Jan 31, 2012 at 06:33:05PM +0100, Steffen Persvold wrote:
> On 1/30/2012 17:15, Paul E. McKenney wrote:
> []
> >>
> >>Hmmm...  I wonder if it waits for a grace period?
> >>
> >>If it cannot be made to work, I can probably put together some
> >>alternative diagnostics, but it will take me a day or three.
> >
> >Actually, another thing to try is "torture_type=rcu_bh" on the modprobe
> >line for rcutorture.  Also, it would be good to get a stack dump of the
> >hung process -- it might be hung for some other reason.
> 
> Paul,
> 
> Do not dwell more over this issue at the moment. I have indications
> that the inconsistency we're seeing is related to something else
> than the RCU code itself.

Thank you for letting me know!

							Thanx, Paul

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