Messages in this thread | | | From | John Stultz <> | Date | Wed, 13 Jul 2016 14:46:37 -0700 | Subject | Re: Severe performance regression w/ 4.4+ on Android due to cgroup locking changes |
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On Wed, Jul 13, 2016 at 2:42 PM, Paul E. McKenney <paulmck@linux.vnet.ibm.com> wrote: > On Wed, Jul 13, 2016 at 02:18:41PM -0700, Paul E. McKenney wrote: >> On Wed, Jul 13, 2016 at 05:05:26PM -0400, Tejun Heo wrote: >> > On Wed, Jul 13, 2016 at 02:03:15PM -0700, Paul E. McKenney wrote: >> > > Take the patch that I just sent out and make the choice of normal >> > > vs. expedited depend on CONFIG_PREEMPT_RT or whatever the -rt guys are >> > > calling it these days. Is there a low-latency Kconfig option other >> > > than CONFIG_NO_HZ_FULL? >> > >> > Sounds like a plan to me. >> >> I like the way we like each other's idea. Mutually assured laziness? ;-) > > But here is what mine might look like. Untested, probably does > not even build. Note that the default is -no- expediting, use the > rcusync.expedited kernel parameter to enable it.
I was working on something similar, but using a config option. Would adding a config option for the default make sense here, since I'd probably prefer to have one less thing to always specify on the cmdline?
thanks -john
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