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Subject[PATCH v2 0/9] rcu: Cleanup RCU tree initialization
Hello Paul,

This is 2nd attempt to make RCU tree initialization bit more
clear and optimize memory footprint of data associated with
the tree.

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


Cc: "Paul E. McKenney" <>
Cc: Steven Rostedt <>

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 | 99 +++++++++++++++++++++---------------------------
kernel/rcu/tree.h | 33 ++++++++--------
kernel/rcu/tree_plugin.h | 4 +-
3 files changed, 61 insertions(+), 75 deletions(-)


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