43 lines
1.4 KiB
Diff
43 lines
1.4 KiB
Diff
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From: John Ogness <john.ogness@linutronix.de>
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Date: Tue, 20 Aug 2024 08:35:59 +0206
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Subject: [PATCH 33/54] panic: Mark emergency section in oops
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.11/older/patches-6.11-rt7.tar.xz
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Mark an emergency section beginning with oops_enter() until the
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end of oops_exit(). In this section, every printk() call will
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attempt to directly flush to the consoles using the EMERGENCY
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priority.
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The very end of oops_exit() performs a kmsg_dump(). This is not
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included in the emergency section because it is another
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flushing mechanism that should occur after the consoles have
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flushed the oops messages.
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Signed-off-by: John Ogness <john.ogness@linutronix.de>
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Reviewed-by: Petr Mladek <pmladek@suse.com>
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Link: https://lore.kernel.org/r/20240820063001.36405-34-john.ogness@linutronix.de
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Signed-off-by: Petr Mladek <pmladek@suse.com>
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Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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---
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kernel/panic.c | 2 ++
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1 file changed, 2 insertions(+)
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--- a/kernel/panic.c
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+++ b/kernel/panic.c
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@@ -685,6 +685,7 @@ bool oops_may_print(void)
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*/
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void oops_enter(void)
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{
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+ nbcon_cpu_emergency_enter();
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tracing_off();
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/* can't trust the integrity of the kernel anymore: */
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debug_locks_off();
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@@ -707,6 +708,7 @@ void oops_exit(void)
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{
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do_oops_enter_exit();
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print_oops_end_marker();
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+ nbcon_cpu_emergency_exit();
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kmsg_dump(KMSG_DUMP_OOPS);
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}
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