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| author | Paul E. McKenney <[email protected]> | 2020-01-06 19:59:58 +0000 |
|---|---|---|
| committer | Paul E. McKenney <[email protected]> | 2020-02-21 00:00:45 +0000 |
| commit | fcb7381265e6cceb1d54283878d145db52b9d9d7 (patch) | |
| tree | 15e2312520978a9d75c899589dee35dd57026896 /tools/perf/scripts/python/event_analyzing_sample.py | |
| parent | Linux 5.6-rc1 (diff) | |
| download | kernel-fcb7381265e6cceb1d54283878d145db52b9d9d7.tar.gz kernel-fcb7381265e6cceb1d54283878d145db52b9d9d7.zip | |
rcu-tasks: *_ONCE() for rcu_tasks_cbs_head
The RCU tasks list of callbacks, rcu_tasks_cbs_head, is sampled locklessly
by rcu_tasks_kthread() when waiting for work to do. This commit therefore
applies READ_ONCE() to that lockless sampling and WRITE_ONCE() to the
single potential store outside of rcu_tasks_kthread.
This data race was reported by KCSAN. Not appropriate for backporting
due to failure being unlikely.
Signed-off-by: Paul E. McKenney <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/event_analyzing_sample.py')
0 files changed, 0 insertions, 0 deletions