diff options
| author | Peter Zijlstra <[email protected]> | 2015-10-16 14:39:38 +0200 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2015-12-04 10:33:41 +0100 |
| commit | b3e0b1b6d841a4b2f64fc09ea728913da8218424 (patch) | |
| tree | 93df412814210f3e4d36dae4e39487aec17a431e /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | 829cf31751aa1c50b1527c1e0c821c99246b5639 (diff) | |
locking, sched: Introduce smp_cond_acquire() and use it
Introduce smp_cond_acquire() which combines a control dependency and a
read barrier to form acquire semantics.
This primitive has two benefits:
- it documents control dependencies,
- its typically cheaper than using smp_load_acquire() in a loop.
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Paul E. McKenney <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions