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| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2021-12-13 11:08:53 +0100 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2022-01-13 16:23:04 -0500 |
| commit | 289e7b0f7eb47b87a0441e6c81336316f301eb39 (patch) | |
| tree | 48538debf71756dd4b53ceabde05da71bc63b440 /scripts/bpf_doc.py | |
| parent | 86599dbe2c5272588f859858239d1f52321eb0f9 (diff) | |
tracing: Account bottom half disabled sections.
Disabling only bottom halves via local_bh_disable() disables also
preemption but this remains invisible to tracing. On a CONFIG_PREEMPT
kernel one might wonder why there is no scheduling happening despite the
N flag in the trace. The reason might be the a rcu_read_lock_bh()
section.
Add a 'b' to the tracing output if in task context with disabled bottom
halves.
Link: https://lkml.kernel.org/r/YbcbtdtC/bjCKo57@linutronix.de
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'scripts/bpf_doc.py')
0 files changed, 0 insertions, 0 deletions