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| author | Paul E. McKenney <[email protected]> | 2014-09-04 12:21:41 -0700 |
|---|---|---|
| committer | Paul E. McKenney <[email protected]> | 2014-11-03 19:20:03 -0800 |
| commit | 11bbb235c26f93b7c69e441452e44adbf6ed6996 (patch) | |
| tree | fbb0889e0a86daf78272f16487a7682fe9cc0117 /tools/perf/util/scripting-engines/trace-event-python.c | |
| parent | 28ced795cbb43f01146feb96d03a72facdee9911 (diff) | |
rcu: Use DEFINE_PER_CPU_SHARED_ALIGNED for rcu_data
The rcu_data per-CPU variable has a number of fields that are atomically
manipulated, potentially by any CPU. This situation can result in false
sharing with per-CPU variables that have the misfortune of being allocated
adjacent to rcu_data in memory. This commit therefore changes the
DEFINE_PER_CPU() to DEFINE_PER_CPU_SHARED_ALIGNED() in order to avoid
this false sharing.
Reported-by: Christoph Lameter <[email protected]>
Signed-off-by: Paul E. McKenney <[email protected]>
Reviewed-by: Christoph Lameter <[email protected]>
Reviewed-by: Pranith Kumar <[email protected]>
Diffstat (limited to 'tools/perf/util/scripting-engines/trace-event-python.c')
0 files changed, 0 insertions, 0 deletions