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| author | Paul E. McKenney <paulmck@kernel.org> | 2025-02-25 10:33:28 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-04-20 10:22:24 +0200 |
| commit | 7c5dd8b9e7f80187a768e0c6378a5eedb7e3705b (patch) | |
| tree | 539063727b6af7a782f9b5668c313f5e9009420e /include/linux | |
| parent | 3b2c3806ef4253595dfcb8b58352cfab55c9bfb0 (diff) | |
| download | linux-7c5dd8b9e7f80187a768e0c6378a5eedb7e3705b.tar.gz linux-7c5dd8b9e7f80187a768e0c6378a5eedb7e3705b.tar.bz2 linux-7c5dd8b9e7f80187a768e0c6378a5eedb7e3705b.zip | |
Flush console log from kernel_power_off()
[ Upstream commit 6ea9a1781c70a8be1fcdc49134fc1bf4baba8bca ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/printk.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/printk.h b/include/linux/printk.h index 4217a9f412b2..5b462029d03c 100644 --- a/include/linux/printk.h +++ b/include/linux/printk.h @@ -207,6 +207,7 @@ void printk_legacy_allow_panic_sync(void); extern bool nbcon_device_try_acquire(struct console *con); extern void nbcon_device_release(struct console *con); void nbcon_atomic_flush_unsafe(void); +bool pr_flush(int timeout_ms, bool reset_on_progress); #else static inline __printf(1, 0) int vprintk(const char *s, va_list args) @@ -315,6 +316,11 @@ static inline void nbcon_atomic_flush_unsafe(void) { } +static inline bool pr_flush(int timeout_ms, bool reset_on_progress) +{ + return true; +} + #endif bool this_cpu_in_panic(void); |