diff options
| author | Peter Zijlstra <[email protected]> | 2019-02-21 15:38:40 +0100 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2019-02-28 07:55:37 +0100 |
| commit | 02e525b2aff1d665f6466e1d123ee4cb69f1d4b0 (patch) | |
| tree | b8ab5cc7bcbe93bcb04a844a4e2352bd62d4679d /tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/EventClass.py | |
| parent | 0614621d89c43ea5b28456c2baf6b0c0e00ca81e (diff) | |
locking/percpu-rwsem: Remove preempt_disable variants
Effective revert commit:
87709e28dc7c ("fs/locks: Use percpu_down_read_preempt_disable()")
This is causing major pain for PREEMPT_RT.
Sebastian did a lot of lockperf runs on 2 and 4 node machines with all
preemption modes (PREEMPT=n should be an obvious NOP for this patch
and thus serves as a good control) and no results showed significance
over 2-sigma (the PREEMPT=n results were almost empty at 1-sigma).
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Signed-off-by: Sebastian Andrzej Siewior <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Paul E. McKenney <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Will Deacon <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/EventClass.py')
0 files changed, 0 insertions, 0 deletions