On 13-03-26 11:27 AM, Viresh Kumar wrote: > On 26 March 2013 22:52, Dietmar Eggemann <dietmar.eggem...@arm.com> wrote: >> Would it be possible for you to merge in 'idlenocb.2013.03.18b' (based >> on v3.9-rc2) (or newer) from >> 'git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git' >> into your big.LITTLE MP tree? I talked to Paul McKenney about this and >> he would like to have this additional test coverage. > > 13.03 release is already over and this would be available after that. > >> (2) On top of the merge, we must assure that the TC2 default config file >> gets changed: >> >> >> Change the config file: >> * Set CONFIG_RCU_FAST_NO_HZ=y >> * Set CONFIG_RCU_NOCB_CPU=y >> * Set CONFIG_RCU_NOCB_CPU_ALL=y > > @Mathieu/Nicolas: you see any issues with these? I know we have been > working on some issues with/without them for some time. >
The CONFIG_RCU_FAST_NO_HZ option is known to increase the likely hood of hitting a tight race condition in the cpu hotplug and smpboot thread area. The condition doesn't disappear when the option is off but it decreases the failure rate. Mathieu. _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
