diff options
| author | John Ogness <john.ogness@linutronix.de> | 2024-08-20 08:35:59 +0206 |
|---|---|---|
| committer | Petr Mladek <pmladek@suse.com> | 2024-08-21 15:03:04 +0200 |
| commit | 4bdfa0d8e920c391e6cc0aa1feef8ed91d81f724 (patch) | |
| tree | 67a4f5bd065f849047199a5f725a3893f6dc2d07 | |
| parent | 4833794db61c8cc4de4563a2754c7aedaffbb684 (diff) | |
| download | lwn-4bdfa0d8e920c391e6cc0aa1feef8ed91d81f724.tar.gz lwn-4bdfa0d8e920c391e6cc0aa1feef8ed91d81f724.zip | |
panic: Mark emergency section in oops
Mark an emergency section beginning with oops_enter() until the
end of oops_exit(). In this section, every printk() call will
attempt to directly flush to the consoles using the EMERGENCY
priority.
The very end of oops_exit() performs a kmsg_dump(). This is not
included in the emergency section because it is another
flushing mechanism that should occur after the consoles have
flushed the oops messages.
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20240820063001.36405-34-john.ogness@linutronix.de
Signed-off-by: Petr Mladek <pmladek@suse.com>
| -rw-r--r-- | kernel/panic.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/panic.c b/kernel/panic.c index 1a10b6e2a855..753d12f4dc8f 100644 --- a/kernel/panic.c +++ b/kernel/panic.c @@ -685,6 +685,7 @@ bool oops_may_print(void) */ void oops_enter(void) { + nbcon_cpu_emergency_enter(); tracing_off(); /* can't trust the integrity of the kernel anymore: */ debug_locks_off(); @@ -707,6 +708,7 @@ void oops_exit(void) { do_oops_enter_exit(); print_oops_end_marker(); + nbcon_cpu_emergency_exit(); kmsg_dump(KMSG_DUMP_OOPS); } |