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Date: Tue, 7 Oct 2014 13:45:28 -0400 From: Joe Lawrence <joe.lawrence@...atus.com> To: <paulmck@...ux.vnet.ibm.com> CC: Jiri Pirko <jiri@...nulli.us>, Tejun Heo <tj@...nel.org>, <linux-kernel@...r.kernel.org>, <stable@...r.kernel.org> Subject: Re: [PATCH v2 1/2] workqueue: add quiescent state between work items On Tue, 7 Oct 2014 06:43:29 -0700 "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> wrote: > On Tue, Oct 07, 2014 at 09:29:42AM +0200, Jiri Pirko wrote: [ ... snip ... ] > > > > Paul, Tehun, how do you propose to fix this on older kernels which do > > not have rcu_note_voluntary_context_switch? I'm particullary interested > > in 3.10. > > Hello, Jiri, > > Older kernels can instead use rcu_note_context_switch(). Hi Paul, Does 4a81e8328d37 ("rcu: Reduce overhead of cond_resched() checks for RCU") affect a backport to 3.10? I noticed that rcu_note_context_switch added a call to rcu_momentary_dyntick_idle in that change, which is only present in v3.16+. Would rcu_note_context_switch be effective by itself on a 3.10 kernel? Thanks, -- Joe -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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