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Feng Tang
de6da1e8bc
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]>