Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rather thanrcu

[Christoph Lameter]

Paul E. McKenney wrote:

> But I am not sure that this gets the grace periods to go fast enough to
> cover Christoph's use case -- he seems to be in a "faster is better"
> space rather than in an "at least this fast" space.  Still, it would
> likely help in some important cases.

I think there was an AIM9 regression in the close/open tests when the struct
file was switched to RCU. That test could be run with various intervals to
figure out if a shorter RCU period is beneficial and how short an RCU period
is needed to avoid the regression.


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