On Tue, Oct 28, 2014 at 03:22:59PM -0700, Paul E. McKenney wrote: > From: Clark Williams <clark.willi...@gmail.com> > > Rename CONFIG_RCU_BOOST_PRIO to CONFIG_RCU_KTHREAD_PRIO and use this > value for both the per-CPU kthreads (rcuc/N) and the rcu boosting > threads (rcub/n). > > Also, create the module_parameter rcutree.kthread_prio to be used on > the kernel command line at boot to set a new value (rcutree.kthread_prio=N). > > Signed-off-by: Clark Williams <clark.willi...@gmail.com> > [ paulmck: Ported to rcu/dev, applied Paul Bolle feedback. ] > Signed-off-by: Paul E. McKenney <paul...@linux.vnet.ibm.com> > --- > Documentation/kernel-parameters.txt | 6 ++++++ > init/Kconfig | 23 > +++++++++++----------- > kernel/rcu/tree_plugin.h | 20 +++++++++---------- > .../selftests/rcutorture/configs/rcu/TREE03 | 2 +- > .../selftests/rcutorture/doc/TREE_RCU-kconfig.txt | 4 ++-- > 5 files changed, 31 insertions(+), 24 deletions(-) > > diff --git a/Documentation/kernel-parameters.txt > b/Documentation/kernel-parameters.txt > index 7dbe5ec9d9cd..7d3b3328bf5c 100644 > --- a/Documentation/kernel-parameters.txt > +++ b/Documentation/kernel-parameters.txt > @@ -2922,6 +2922,12 @@ bytes respectively. Such letter suffixes can also be > entirely omitted. > quiescent states. Units are jiffies, minimum > value is one, and maximum value is HZ. > > + rcutree.kthread_prio= [KNL,BOOT] > + Set the SCHED_FIFO priority of the RCU > + per-CPU kthreads (rcuc/N). This value is also > + used for the priority of the RCU boost threads > + (rcub/N). Valid values are 1-99. > +
It would maybe be useful to mention the default? Also, should we look at running this stuff as deadline in order to provide interference guarantees etc.. ? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
