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| author | John Ogness <john.ogness@linutronix.de> | 2022-04-21 23:28:40 +0206 |
|---|---|---|
| committer | Petr Mladek <pmladek@suse.com> | 2022-04-22 21:30:57 +0200 |
| commit | 5341b93dea8c39d7612f7a227015d4b1d5cf30db (patch) | |
| tree | 720691f7d680899dc1f1673487a625cb2c9409e2 /tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/SchedGui.py | |
| parent | 938ba4084abcf6fdd21d9078513c52f8fb9b00d0 (diff) | |
printk: wake waiters for safe and NMI contexts
When printk() is called from safe or NMI contexts, it will directly
store the record (vprintk_store()) and then defer the console output.
However, defer_console_output() only causes console printing and does
not wake any waiters of new records.
Wake waiters from defer_console_output() so that they also are aware
of the new records from safe and NMI contexts.
Fixes: 03fc7f9c99c1 ("printk/nmi: Prevent deadlock when accessing the main log buffer in NMI")
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20220421212250.565456-6-john.ogness@linutronix.de
Diffstat (limited to 'tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/SchedGui.py')
0 files changed, 0 insertions, 0 deletions