diff options
Diffstat (limited to 'debian/patches-rt/0027-panic-Mark-emergency-section-in-oops.patch')
| -rw-r--r-- | debian/patches-rt/0027-panic-Mark-emergency-section-in-oops.patch | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/debian/patches-rt/0027-panic-Mark-emergency-section-in-oops.patch b/debian/patches-rt/0027-panic-Mark-emergency-section-in-oops.patch new file mode 100644 index 0000000000..4c382ac927 --- /dev/null +++ b/debian/patches-rt/0027-panic-Mark-emergency-section-in-oops.patch @@ -0,0 +1,40 @@ +From: John Ogness <john.ogness@linutronix.de> +Date: Tue, 19 Sep 2023 17:07:34 +0000 +Subject: [PATCH 27/46] panic: Mark emergency section in oops +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.9/older/patches-6.9-rt5.tar.xz + +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, a flushing of the +console output is triggered 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 +been triggered to flush. + +Signed-off-by: John Ogness <john.ogness@linutronix.de> +Reviewed-by: Petr Mladek <pmladek@suse.com> +Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +--- + kernel/panic.c | 2 ++ + 1 file changed, 2 insertions(+) + +--- a/kernel/panic.c ++++ b/kernel/panic.c +@@ -638,6 +638,7 @@ 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(); +@@ -660,6 +661,7 @@ void oops_exit(void) + { + do_oops_enter_exit(); + print_oops_end_marker(); ++ nbcon_cpu_emergency_exit(); + kmsg_dump(KMSG_DUMP_OOPS); + } + |