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Message-ID: <4F2825D1.3030306@numascale.com>
Date: Tue, 31 Jan 2012 18:33:05 +0100
From: Steffen Persvold <sp@...ascale.com>
To: paulmck@...ux.vnet.ibm.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 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.
Kind regards,
--
Steffen Persvold, Chief Architect NumaChip
Numascale AS - www.numascale.com
Tel: +47 92 49 25 54 Skype: spersvold
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