Commit 8c2b91fb authored Aug 25, 2025 by Feng Tang Committed by Andrew Morton Sep 13, 2025

panic: refine the document for 'panic_print'

User reported current document about SYS_INFO_PANIC_CONSOLE_REPLAY is
confusing, that people could expect all user space console messages to be
replayed.

Specify that only 'kernel' messages will be replayed to solve the confusion.

Link: https://lkml.kernel.org/r/20250825025701.81921-3-feng.tang@linux.alibaba.com


Signed-off-by: Feng Tang <feng.tang@linux.alibaba.com>
Reported-by: Askar Safin <safinaskar@zohomail.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Cc: John Ogness <john.ogness@linutronix.de>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: "Paul E . McKenney" <paulmck@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

parent 31cf021b

Documentation/admin-guide/kernel-parameters.txt

+1 −1

Original line number	Diff line number	Diff line
		@@ -4589,7 +4589,7 @@
		bit 2: print timer info
		bit 3: print locks info if CONFIG_LOCKDEP is on
		bit 4: print ftrace buffer
		bit 5: replay all messages on consoles at the end of panic
		bit 5: replay all kernel messages on consoles at the end of panic
		bit 6: print all CPUs backtrace (if available in the arch)
		bit 7: print only tasks in uninterruptible (blocked) state
		Be aware that this option may print a _lot_ of lines,

Documentation/admin-guide/sysctl/kernel.rst

+1 −1

Original line number	Diff line number	Diff line
		@@ -890,7 +890,7 @@ bit 1 print system memory info
		bit 2 print timer info
		bit 3 print locks info if ``CONFIG_LOCKDEP`` is on
		bit 4 print ftrace buffer
		bit 5 replay all messages on consoles at the end of panic
		bit 5 replay all kernel messages on consoles at the end of panic
		bit 6 print all CPUs backtrace (if available in the arch)
		bit 7 print only tasks in uninterruptible (blocked) state
		===== ============================================