linux-kernel - Re: Fw: RCU boot debug patch

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Date:	Thu, 21 Jul 2011 11:09:57 +0530
From:	RKK <kulkarni.ravi4@...il.com>
To:	paulmck@...ux.vnet.ibm.com
Cc:	kernelmail.jms@...il.com, linux-kernel@...r.kernel.org,
	cmm@...ibm.com
Subject: Re: Fw: RCU boot debug patch

On Wed, Jul 20, 2011 at 9:39 PM, Paul E. McKenney
<paulmck@...ux.vnet.ibm.com> wrote:
> On Wed, Jul 20, 2011 at 09:23:06PM +0530, RKK wrote:
>> Hi Paul
>>
>> >>
>> >> On Wed, Jul 20, 2011 at 4:11 AM, Paul E. McKenney
>> >> <paulmck@...ux.vnet.ibm.com> wrote:
>> >> > Hello, Julie and Ravi,
>> >> >
>> >> > Although we arrived at a patch that worked for both of you, we never did
>> >> > identify exactly which RCU callback (or other issue) that was causing
>> >> > the problem.  It would be good to do this in case there is some other
>> >> > problem lurking that might bite us in the future.  Mingming has therefore
>> >> > put together the following diagnostic patch which should identify the
>> >> > callbacks, please see below.
>> >> >
>> >> > So could you please run this and let us know what you find?  There should
>> >> > at least be a message for artificial_callback().
>> >> >
>> >>
>> >>  Do i need to  apply this patch on today's Linus master or on -rc7 ?
>> >
>> > Please do not use -rc7, as that would reproduce your hang.  Linus master
>> > tree would be best, but -rc7 with the fix applied would work fine as well.
>> >
>>
>> Ok. will apply against Linus Master tree and get back to you sometime
>> later tonight.
>

I applied and booted into today's Linus master tree today . it booted
fine.  Im attaching the dmesg output for you. you want anyother info?



Warm Regards,
Ravi Kulkarni.

View attachment "dmesg.txt" of type "text/plain" (60981 bytes)