diff options
| author | Paul E. McKenney <paulmck@kernel.org> | 2025-02-25 10:33:28 -0800 |
|---|---|---|
| committer | Boqun Feng <boqun.feng@gmail.com> | 2025-03-04 18:44:29 -0800 |
| commit | 6ea9a1781c70a8be1fcdc49134fc1bf4baba8bca (patch) | |
| tree | 47cd4938cd68d123c0ef320fe8e71eba9f01f904 /kernel/reboot.c | |
| parent | 59bed79ffdbc26af3dfba3c6453a4356c9fd6b6f (diff) | |
Flush console log from kernel_power_off()
Kernels built with CONFIG_PREEMPT_RT=y can lose significant console output
and shutdown time, which hides shutdown-time RCU issues from rcutorture.
Therefore, make pr_flush() public and invoke it after then last print
in kernel_power_off().
[ paulmck: Apply John Ogness feedback. ]
[ paulmck: Appy Sebastian Andrzej Siewior feedback. ]
[ paulmck: Apply kernel test robot feedback. ]
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Reviewed-by: John Ogness <john.ogness@linutronix.de>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Link: https://lore.kernel.org/r/5f743488-dc2a-4f19-bdda-cf50b9314832@paulmck-laptop
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Diffstat (limited to 'kernel/reboot.c')
| -rw-r--r-- | kernel/reboot.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/reboot.c b/kernel/reboot.c index b5a8569e5d81..41ab9e1ba357 100644 --- a/kernel/reboot.c +++ b/kernel/reboot.c @@ -704,6 +704,7 @@ void kernel_power_off(void) migrate_to_reboot_cpu(); syscore_shutdown(); pr_emerg("Power down\n"); + pr_flush(1000, true); kmsg_dump(KMSG_DUMP_SHUTDOWN); machine_power_off(); } |