Feng Tang de6da1e8bc panic: add an option to replay all the printk message in buffer ...

Currently on panic, kernel will lower the loglevel and print out pending
printk msg only with console_flush_on_panic().

Add an option for users to configure the "panic_print" to replay all
dmesg in buffer, some of which they may have never seen due to the
loglevel setting, which will help panic debugging .

[[email protected]: keep the original console_flush_on_panic() inside panic()]
  Link: http://lkml.kernel.org/r/[email protected]
[[email protected]: use logbuf lock to protect the console log index]
  Link: http://lkml.kernel.org/r/[email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Feng Tang <[email protected]>
Reviewed-by: Petr Mladek <[email protected]>
Cc: Aaro Koskinen <[email protected]>
Cc: Petr Mladek <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Sergey Senozhatsky <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Borislav Petkov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

2019-05-18 15:52:26 -07:00

..

braille.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

braille.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

console_cmdline.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

internal.h

printk/nmi: Prevent deadlock when accessing the main log buffer in NMI

2018-07-09 14:10:40 +02:00

Makefile

printk: introduce per-cpu safe_print seq buffer

2017-02-08 11:07:11 +01:00

printk_safe.c

printk/tracing: Do not trace printk_nmi_enter()

2018-09-06 11:24:05 -04:00

printk.c

panic: add an option to replay all the printk message in buffer

2019-05-18 15:52:26 -07:00