[PATCH v6 04/46] percpu_rwlock: Implement the core design of Per-CPU Reader-Writer Locks

Srivatsa S. Bhat srivatsa.bhat at linux.vnet.ibm.com
Mon Feb 18 11:46:05 EST 2013

On 02/18/2013 10:01 PM, Steven Rostedt wrote:
> On Mon, 2013-02-18 at 21:51 +0530, Srivatsa S. Bhat wrote:
>> Hi Michel,
>> Yes.. I don't think we can avoid that. Moreover, since we _want_ unfair
>> reader/writer semantics to allow flexible locking rules and guarantee
>> deadlock-safety, having a recursive reader side is not even an issue, IMHO.
> Recursive unfair reader lock may guarantee deadlock-safety, but
> remember, it adds a higher probability of live-locking the write_lock.
> Which is another argument to keep this separate to cpu hotplug only.

Srivatsa S. Bhat

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