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| author | Paul E. McKenney <paulmck@kernel.org> | 2023-12-04 09:33:29 -0800 |
|---|---|---|
| committer | Boqun Feng <boqun.feng@gmail.com> | 2024-02-14 08:02:08 -0800 |
| commit | 2eb52fa8900e642b3b5054c4bf9776089d2a935f (patch) | |
| tree | d6863a629d3a9fe5cfeee2c0a36c5fdce56a0d20 /tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/SchedGui.py | |
| parent | 41bccc98fb7931d63d03f326a746ac4d429c1dd3 (diff) | |
rcu-tasks: Repair RCU Tasks Trace quiescence check
The context-switch-time check for RCU Tasks Trace quiescence expects
current->trc_reader_special.b.need_qs to be zero, and if so, updates
it to TRC_NEED_QS_CHECKED. This is backwards, because if this value
is zero, there is no RCU Tasks Trace grace period in flight, an thus
no need for a quiescent state. Instead, when a grace period starts,
this field is set to TRC_NEED_QS.
This commit therefore changes the check from zero to TRC_NEED_QS.
Reported-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Tested-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Diffstat (limited to 'tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/SchedGui.py')
0 files changed, 0 insertions, 0 deletions