Re: [PATCH RFC ticketlock] Auto-queued ticketlock

[Benjamin Herrenschmidt]

On Fri, 2013-06-14 at 14:17 -0400, Waiman Long wrote:
> 
> With some minor changes, the current patch can be modified to support 
> debugging lock for 32-bit system. For 64-bit system, we can apply a 
> similar concept for debugging lock with cmpxchg_double. However, for 
> architecture that does not have cmpxchg_double support, it will be out 
> of luck and we probably couldn't support the same feature in debugging 
> mode. It will have to fall back to taking the lock.

That means only x86_64 and s390 would benefit from it ... I'm sure we can do better :-)

Cheers,
Ben.


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