Re: Fw: RCU boot debug patch

From: RKK
Date: Wed Jul 20 2011 - 11:53:12 EST

Hi Paul

>> On Wed, Jul 20, 2011 at 4:11 AM, Paul E. McKenney
>> <paulmck@xxxxxxxxxxxxxxxxxx> 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.

Warm Regards,
Ravi Kulkarni.
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