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author | Feng Tang <feng.tang@intel.com> | 2019-05-18 00:31:50 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-19 01:52:26 +0300 |
commit | de6da1e8bcf0dd2058b950b127491821207679dc (patch) | |
tree | 2d54c823763d46cd070e5a721040bc1514df52ed /arch/arc/boot | |
parent | 5d59aa8f9ce972b472201aed86e904bb75879ff0 (diff) | |
download | linux-de6da1e8bcf0dd2058b950b127491821207679dc.tar.xz |
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 .
[feng.tang@intel.com: keep the original console_flush_on_panic() inside panic()]
Link: http://lkml.kernel.org/r/1556199137-14163-1-git-send-email-feng.tang@intel.com
[feng.tang@intel.com: use logbuf lock to protect the console log index]
Link: http://lkml.kernel.org/r/1556269868-22654-1-git-send-email-feng.tang@intel.com
Link: http://lkml.kernel.org/r/1556095872-36838-1-git-send-email-feng.tang@intel.com
Signed-off-by: Feng Tang <feng.tang@intel.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Cc: Aaro Koskinen <aaro.koskinen@nokia.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Borislav Petkov <bp@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/arc/boot')
0 files changed, 0 insertions, 0 deletions