Messages in this thread | | | Date | Mon, 23 Apr 2018 05:32:23 -0700 | From | "Paul E. McKenney" <> | Subject | Re: [PATCH tip/core/rcu 06/22] rcu: Rename cond_resched_rcu_qs() to cond_resched_tasks_rcu_qs() |
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On Mon, Apr 23, 2018 at 10:53:47AM +0200, Peter Zijlstra wrote: > On Sun, Apr 22, 2018 at 07:32:11PM -0700, Paul E. McKenney wrote: > > Commit e31d28b6ab8f ("trace: Eliminate cond_resched_rcu_qs() in favor > > of cond_resched()") substituted cond_resched() for the earlier call > > to cond_resched_rcu_qs(). However, the new-age cond_resched() does > > not do anything to help RCU-tasks grace periods because (1) RCU-tasks > > is only enabled when CONFIG_PREEMPT=y and (2) cond_resched() is a > > complete no-op when preemption is enabled. This situation results > > in hangs when running the trace benchmarks. > > But a few patches earlier you tried to address that..
Yes. And all this patch does is change the name to better match what this primitive actually does.
I could merge the two patches, if that would help.
Thanx, Paul
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