From 4b23aff083649eafa141ed69ad0ff59ba639edf8 Mon Sep 17 00:00:00 2001 From: Richard Purdie Date: Tue, 29 May 2007 13:31:42 +0100 Subject: [MTD] oops and panic message logging to MTD device Kernel oops and panic messages are invaluable when debugging crashes. These messages often don't make it to flash based logging methods (say a syslog on jffs2) due to the overheads involved in writing to flash. This patch allows you to turn an MTD partition into a circular log buffer where kernel oops and panic messages are written to. The messages are obtained by registering a console driver and checking oops_in_progress. Erases are performed in advance to maximise the chances of a saving messages. To activate it, add console=ttyMTDx to the kernel commandline (where x is the mtd device number to use). Signed-off-by: Richard Purdie Signed-off-by: David Woodhouse --- drivers/mtd/Kconfig | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'drivers/mtd/Kconfig') diff --git a/drivers/mtd/Kconfig b/drivers/mtd/Kconfig index fbec8cd55e3..8848e8ac705 100644 --- a/drivers/mtd/Kconfig +++ b/drivers/mtd/Kconfig @@ -278,6 +278,14 @@ config SSFDC This enables read only access to SmartMedia formatted NAND flash. You can mount it with FAT file system. +config MTD_OOPS + tristate "Log panic/oops to an MTD buffer" + depends on MTD + help + This enables panic and oops messages to be logged to a circular + buffer in a flash partition where it can be read back at some + later point. + source "drivers/mtd/chips/Kconfig" source "drivers/mtd/maps/Kconfig" -- cgit v1.2.3