45 lines
1.3 KiB
Diff
45 lines
1.3 KiB
Diff
From d562c13004b0c324736db8e33568e2b71b45fb68 Mon Sep 17 00:00:00 2001
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From: John Ogness <john.ogness@linutronix.de>
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Date: Tue, 19 Sep 2023 17:07:34 +0000
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Subject: [PATCH 144/196] panic: Mark emergency section in oops
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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, the CPU will not perform
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console output for the printk() calls. Instead, a flushing of the
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console output will triggered when exiting the emergency section.
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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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been triggered to flush.
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Signed-off-by: John Ogness <john.ogness@linutronix.de>
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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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diff --git a/kernel/panic.c b/kernel/panic.c
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index 147803c3a402..9215df21d8c2 100644
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--- a/kernel/panic.c
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+++ b/kernel/panic.c
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@@ -630,6 +630,7 @@ 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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@@ -652,6 +653,7 @@ 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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--
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2.43.2
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