Messages in this thread | | | Date | Wed, 13 May 2020 11:15:37 -0700 | From | "Paul E. McKenney" <> | Subject | Re: [PATCH 00/10] rcu: Allow a CPU to leave and reenter NOCB state |
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On Wed, May 13, 2020 at 06:47:04PM +0200, Frederic Weisbecker wrote: > This is a necessary step toward making nohz_full controllable through > cpuset. Next step should be to allow a CPU to be nocb even if it wasn't > part of the nocb set on boot. > > The core design of this set is mostly based on suggestions from Paul > of course. > > git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git > rcu/nohz > > HEAD: 31cb4ee9da4e9cc6314498ff22d83f0d872b1a88
Very cool!!! A few comments on individual commits on a quick first scan, and more later.
Thanx, Paul
> Thanks, > Frederic > --- > > Frederic Weisbecker (10): > rcu: Directly lock rdp->nocb_lock on nocb code entrypoints > rcu: Use direct rdp->nocb_lock operations on local calls > rcu: Make locking explicit in do_nocb_deferred_wakeup_common() > rcu: Implement rcu_segcblist_is_offloaded() config dependent > rcu: Remove useless conditional nocb unlock > rcu: Make nocb_cb kthread parkable > rcu: Temporarily assume that nohz full CPUs might not be NOCB > rcu: Allow to deactivate nocb on a CPU > rcu: Allow to re-offload a CPU that used to be nocb > rcu: Nocb (de)activate through sysfs > > > include/linux/rcu_segcblist.h | 2 + > include/linux/rcupdate.h | 4 ++ > kernel/cpu.c | 23 +++++++ > kernel/rcu/rcu_segcblist.c | 6 +- > kernel/rcu/rcu_segcblist.h | 8 ++- > kernel/rcu/tree.c | 24 +++---- > kernel/rcu/tree.h | 2 +- > kernel/rcu/tree_plugin.h | 149 ++++++++++++++++++++++++++++++++++-------- > 8 files changed, 172 insertions(+), 46 deletions(-)
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