Re: [PATCH 0/5] kfree_rcu() additions for -rcu

[Joel Fernandes]

On Wed, Aug 28, 2019 at 01:28:08PM -0700, Paul E. McKenney wrote:
> On Tue, Aug 27, 2019 at 03:01:54PM -0400, Joel Fernandes (Google) wrote:
> > Hi,
> > 
> > This is a series on top of the patch "rcu/tree: Add basic support for kfree_rcu() batching".
> > 
> > Link: http://lore.kernel.org/r/20190814160411.58591-1-joel@xxxxxxxxxxxxxxxxx
> > 
> > It adds performance tests, some clean ups and removal of "lazy" RCU callbacks.
> > 
> > Now that kfree_rcu() is handled separately from call_rcu(), we also get rid of
> > kfree "lazy" handling from tree RCU as suggested by Paul which will be unused.
> > This also results in a nice negative delta as well.
> > 
> > Joel Fernandes (Google) (5):
> > rcu/rcuperf: Add kfree_rcu() performance Tests
> > rcu/tree: Add multiple in-flight batches of kfree_rcu work
> > rcu/tree: Add support for debug_objects debugging for kfree_rcu()
> > rcu: Remove kfree_rcu() special casing and lazy handling
> > rcu: Remove kfree_call_rcu_nobatch()
> > 
> > Documentation/RCU/stallwarn.txt               |  13 +-
> > .../admin-guide/kernel-parameters.txt         |  13 ++
> > include/linux/rcu_segcblist.h                 |   2 -
> > include/linux/rcutiny.h                       |   5 -
> > include/linux/rcutree.h                       |   1 -
> > include/trace/events/rcu.h                    |  32 ++--
> > kernel/rcu/rcu.h                              |  27 ---
> > kernel/rcu/rcu_segcblist.c                    |  25 +--
> > kernel/rcu/rcu_segcblist.h                    |  25 +--
> > kernel/rcu/rcuperf.c                          | 173 +++++++++++++++++-
> > kernel/rcu/srcutree.c                         |   4 +-
> > kernel/rcu/tiny.c                             |  29 ++-
> > kernel/rcu/tree.c                             | 145 ++++++++++-----
> > kernel/rcu/tree.h                             |   1 -
> > kernel/rcu/tree_plugin.h                      |  42 +----
> > kernel/rcu/tree_stall.h                       |   6 +-
> > 16 files changed, 337 insertions(+), 206 deletions(-)
> 
> Looks like a 131-line positive delta to me.  ;-)

Not if you overlook the rcuperf changes which is just test code. :-D ;-)

thanks,

 - Joel