On 06/14/2016 02:27 PM, Davidlohr Bueso wrote:
On Tue, 14 Jun 2016, Waiman Long wrote:This patch provides a way for the kernel code to designate specific rwsems to be more aggressive in term of optimistic spinning that the writers will continue to spin for some additional count-based time to see if it can get the lock before sleeping. This aggressive spinning mode should only be used on rwsems where the readers are unlikely to go to sleep.Yikes, exposing this sort of thing makes me _very_ uneasy, not to mentionthe ad-hoc nature and its easiness to mess up. I'm not really for this, evenif it shows extraordinary performance boosts on benchmarks. Thanks, Davidlohr
I understand your concern. I will see if there is a way to autotune instead of using explicit enablement.
Cheers, Longman -- To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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