From d44c1eb9f98cd8bc25413274354ae338024e4518 Mon Sep 17 00:00:00 2001 From: John Ogness Date: Tue, 19 Sep 2023 17:07:34 +0000 Subject: [PATCH 135/184] panic: Mark emergency section in oops Mark an emergency section beginning with oops_enter() until the end of oops_exit(). In this section, the CPU will not perform console output for the printk() calls. Instead, the console output will be flushed when exiting the emergency section. 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. Signed-off-by: John Ogness Signed-off-by: Sebastian Andrzej Siewior --- kernel/panic.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/panic.c b/kernel/panic.c index 2cc5f002033d..bf5ad631eaf9 100644 --- a/kernel/panic.c +++ b/kernel/panic.c @@ -622,6 +622,7 @@ 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(); @@ -644,6 +645,7 @@ void oops_exit(void) { do_oops_enter_exit(); print_oops_end_marker(); + nbcon_cpu_emergency_exit(); kmsg_dump(KMSG_DUMP_OOPS); } -- 2.34.1