Re: [PATCH 2/2 v6] locking/selftest: Support queued rwlock

[Waiman Long <waiman.long@hp.com>]

On 08/05/2014 09:28 AM, Peter Zijlstra wrote:
> On Tue, Jul 29, 2014 at 02:53:19PM -0400, Waiman Long wrote:
>> The queued rwlock does not support the use of recursive read-lock in
>> the process context. With changes in the lockdep code to check and
>> disallow recursive read-lock, it is also necessary for the locking
>> selftest to be updated to change the process context recursive read
>> locking results from SUCCESS to FAILURE for rwlock.
>>
> Maybe I wasn't clear; but I meant you should extend the lock tests to
> cover the full qrwlock semantics.
>
> That means we also need tests like:
>
> 	RL(X1);
> 	IRQ_ENTER();
> 	RL(X2);
> 	IRQ_EXIT();
>
> To fully validate that in_interrupt exception to fairness etc..

Sorry for misinterpretation. I have just sent out an updated patch with 
additional self tests to verify that recursive read-lock is allowed 
under interrupt context.

-Longman