Re: [PATCH 3/4 RFC] RCU: preemptible RCU

[John Sigler <linux.kernel@free.fr>]

[ Recipients list trimmed ]

Paul E. McKenney wrote:

> This patch was developed as a part of the -rt kernel development and
> meant to provide better latencies when read-side critical sections of
> RCU don't disable preemption.  As a consequence of keeping track of RCU
> readers, the readers have a slight overhead (optimizations in the paper).
> This implementation co-exists with the "classic" RCU implementations
> and can be switched to at compiler.

I cannot parse the last sentence :-)

Did you mean that this new implementation can be chosen (over the 
classic implementation) at compile-time?

Regards.