diff options
| author | Richard Purdie <richard@openedhand.com> | 2007-05-29 14:31:42 +0200 |
|---|---|---|
| committer | David Woodhouse <dwmw2@infradead.org> | 2007-06-28 21:18:02 +0200 |
| commit | 4b23aff083649eafa141ed69ad0ff59ba639edf8 (patch) | |
| tree | 92baaa2c23706f8a6b118ce17b99ee378863a9d0 /drivers/mtd/Kconfig | |
| parent | [MTD] [NAND] at91_nand rdy_pin fix (diff) | |
| download | linux-4b23aff083649eafa141ed69ad0ff59ba639edf8.tar.xz linux-4b23aff083649eafa141ed69ad0ff59ba639edf8.zip | |
[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/Kconfig | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/mtd/Kconfig b/drivers/mtd/Kconfig index fbec8cd55e38..8848e8ac705d 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" |