Will Deacon 84b5ec8a9d printk: report dropping of messages from logbuf ... If the log ring buffer becomes full, we silently overwrite old messages with new data. console_unlock will detect this case and fast-forward the console_* pointers to skip over the corrupted data, but nothing will be reported to the user. This patch hijacks the first valid log message after detecting that we dropped messages and prefixes it with a note detailing how many messages were dropped. For long (~1000 char) messages, this will result in some truncation of the real message, but given that we're dropping things anyway, that doesn't seem to be the end of the world. Signed-off-by: Will Deacon <will.deacon@arm.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Cc: Kay Sievers <kay@vrfy.org> Cc: Jan Kara <jack@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2014-06-04 16:54:17 -07:00
..
braille.c	printk: Fix return of braille_register_console()	2013-08-06 13:18:12 -07:00
braille.h	printk: move braille console support into separate braille.[ch] files	2013-07-31 14:41:03 -07:00
console_cmdline.h	printk: add console_cmdline.h	2013-07-31 14:41:03 -07:00
Makefile	printk: move braille console support into separate braille.[ch] files	2013-07-31 14:41:03 -07:00
printk.c	printk: report dropping of messages from logbuf	2014-06-04 16:54:17 -07:00