Per-CPU-variable updates
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| Patch | Christoph Lameter | Pranith Kumar |
|---|---|---|
| Series | R-b | Reviewd-by R-b |
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Cover letter [PATCH tip/core/rcu 0/9] Per-CPU-variable updates
Hello!
This series updates RCU's handling of per-CPU variables, mostly moving from "cpu" function arguments to various "this_"-style accessors for per-CPU variables:
1. Drop the rdtp argument from RCU's dyntick-idle and sysidle
functions, substituting this_cpu_ptr(), courtesy of Christoph Lameter.
2. Use DEFINE_PER_CPU_SHARED_ALIGNED for rcu_data structures in
order to avoid false sharing with other per-CPU variables.
3-9. Remove "cpu" arguments from a number of RCU functions that are
only ever invoked on that CPU, and use appropriate "this_"-style accesssors for the per-CPU variables.
Thanx, Paul
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b/include/linux/rcupdate.h | 2 +- b/include/linux/rcutiny.h | 2 +- b/include/linux/rcutree.h | 4 ++-- b/kernel/cpu.c | 19 +++++++++++++------ b/kernel/rcu/tiny.c | 2 +- b/kernel/rcu/tree.c | 25 +++++++++++++------------ b/kernel/rcu/tree.h | 4 ++-- b/kernel/rcu/tree_plugin.h | 11 +++++++---- b/kernel/sched/core.c | 2 +- b/kernel/softirq.c | 2 +- b/kernel/time/tick-sched.c | 2 +- b/kernel/time/timer.c | 3 +-- include/linux/rcupdate.h | 2 +- include/linux/rcutree.h | 2 +- kernel/rcu/tree.c | 30 +++++++++++++++--------------- kernel/rcu/tree.h | 8 ++++---- kernel/rcu/tree_plugin.h | 42 +++++++++++++++++++++--------------------- 17 files changed, 86 insertions(+), 76 deletions(-)