Re: [PATCH][RFC]: mutex: adaptive spin

[Peter Zijlstra]

On Tue, 2009-01-06 at 13:42 -0800, Paul E. McKenney wrote:
> Preemptable RCU needs to be faster.  Got it -- and might have a way
> to do it by eliminating the irq disabling and cutting way back on the
> number of operations that must be performed.  It would probably still
> be necessary to access the task structure.
> 
> Or is something other than the raw performance of rcu_read_lock() and
> rcu_read_unlock() at issue here?

With Linus' mutex_spin_or_schedule() function the whole - keeping
owner's task_struct alive issue goes away,.. now if only the thing would
boot...
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