Hello, Rik. On Wed, May 23, 2018 at 06:03:15PM -0400, Rik van Riel wrote: > Dumb question. Does setting max_active to 1 mean > that every cgwb_release_workfn() ends up forcing > another RCU grace period on the whole system, while > today you might have a bunch of them waiting on the > same RCU grace period advance? > > Would it be faster to have some number (up to 16?) > push RCU once, at the same time, instead of having > each of them push RCU into a next grace period one > after another?
Oh yeah, you're absolutely right. This would end up doing a lot of back-to-back synchronize_rcu_expedited() calls which can't be good. I'll send a patch to push it upto 16. Thanks. -- tejun
