[PATCH v3 0/9] rcu: Cleanup RCU tree initialization

[Alexander Gordeev <agordeev@redhat.com>]

Hello Paul,

This is 3rd attempt to make RCU tree initialization bit more
clear and optimize memory footprint of data associated with
the tree.

Changes since v2:
  - patch 1 fixed to avoid a panic in case rcu_fanout_leaf
    is out of bounds;

Changes since v1:
  - patch 3 fixed to accomodate nr_cpus=1, otherwise rcu_num_lvls
    would yield zero, which is wrong;

The series is against "linux-rcu" tree "rcu/dev" branch

Thanks!

Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>

Alexander Gordeev (9):
  rcu: Panic if RCU tree can not accommodate all CPUs
  rcu: Remove superfluous local variable in rcu_init_geometry()
  rcu: Cleanup rcu_init_geometry() code and arithmetics
  rcu: Simplify rcu_init_geometry() capacity arithmetics
  rcu: Limit rcu_state::levelcnt[] to RCU_NUM_LVLS items
  rcu: Limit rcu_capacity[] size to RCU_NUM_LVLS items
  rcu: Remove unnecessary fields from rcu_state structure
  rcu: Limit count of static data to the number of RCU levels
  rcu: Simplify arithmetic to calculate number of RCU nodes

 kernel/rcu/tree.c        | 109 +++++++++++++++++++++--------------------------
 kernel/rcu/tree.h        |  33 +++++++-------
 kernel/rcu/tree_plugin.h |   4 +-
 3 files changed, 67 insertions(+), 79 deletions(-)

-- 
1.8.3.1