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authorRichard Purdie <richard@openedhand.com>2007-05-29 13:31:42 +0100
committerDavid Woodhouse <dwmw2@infradead.org>2007-06-28 20:18:02 +0100
commit4b23aff083649eafa141ed69ad0ff59ba639edf8 (patch)
tree92baaa2c23706f8a6b118ce17b99ee378863a9d0 /drivers/mtd/Kconfig
parent1100b47ea557e1cd6d9b71fe7ba1a189ed8bf276 (diff)
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[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 <rpurdie@openedhand.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Diffstat (limited to 'drivers/mtd/Kconfig')
-rw-r--r--drivers/mtd/Kconfig8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/mtd/Kconfig b/drivers/mtd/Kconfig
index fbec8cd..8848e8a 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"