Messages in this thread | | | Date | Tue, 10 Dec 2013 15:24:53 +0000 | From | Christoph Lameter <> | Subject | Re: rcu: Avoid irq disable in rcu_cpu_kthread |
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On Mon, 9 Dec 2013, Paul E. McKenney wrote:
> On Thu, Dec 05, 2013 at 09:06:55PM +0000, Christoph Lameter wrote: > > Once we have the per cpu patchset merged we could do the following [it > > even works without that patchset but the __this_cpu ops will not do > > preemption checks]. Would this work? > > Looks plausible at first glance. But are you really seeing performance > issues with this code? It is only compiled into the kernel when you build > with CONFIG_RCU_BOOST=y -- are you actually using that for your workloads?
I have not done any benchmarking. Just looking for more use cases for the this_cpu ops. There is a lot of use of per cpu operations in the rcu code which seems to be areas in which these operations can help.
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