Watchdog Timer Support
configname: CONFIG_WATCHDOG
Linux Kernel Configuration
└─>Device Drivers
└─>Watchdog Timer Support
In linux kernel since version 2.6.12
If you say Y here (and to one of the following options) and create a
character special file /dev/watchdog with major number 10 and minor
number 130 using mknod ("man mknod"), you will get a watchdog, i.e.:
subsequently opening the file and then failing to write to it for
longer than 1 minute will result in rebooting the machine. This
could be useful for a networked machine that needs to come back
on-line as fast as possible after a lock-up. There's both a watchdog
implementation entirely in software (which can sometimes fail to
reboot the machine) and a driver for hardware watchdog boards, which
are more robust and can also keep track of the temperature inside
your computer. For details, read
Documentation/watchdog/watchdog-api.txt in the kernel source.
The watchdog is usually used together with the watchdog daemon
which is available from
<ftp://ibiblio.org/pub/Linux/system/daemons/watchdog/>. This daemon can
also monitor NFS connections and can reboot the machine when the process
table is full.
If unsure, say N.
character special file /dev/watchdog with major number 10 and minor
number 130 using mknod ("man mknod"), you will get a watchdog, i.e.:
subsequently opening the file and then failing to write to it for
longer than 1 minute will result in rebooting the machine. This
could be useful for a networked machine that needs to come back
on-line as fast as possible after a lock-up. There's both a watchdog
implementation entirely in software (which can sometimes fail to
reboot the machine) and a driver for hardware watchdog boards, which
are more robust and can also keep track of the temperature inside
your computer. For details, read
Documentation/watchdog/watchdog-api.txt in the kernel source.
The watchdog is usually used together with the watchdog daemon
which is available from
<ftp://ibiblio.org/pub/Linux/system/daemons/watchdog/>. This daemon can
also monitor NFS connections and can reboot the machine when the process
table is full.
If unsure, say N.
is selected by
CONFIG_SENSORS_SCH5627CONFIG_SENSORS_SCH5636
CONFIG_SOFT_WATCHDOG
CONFIG_DA9052_WATCHDOG
CONFIG_DA9055_WATCHDOG
CONFIG_WM831X_WATCHDOG
CONFIG_WM8350_WATCHDOG
CONFIG_ARM_SP805_WATCHDOG
CONFIG_AT91SAM9X_WATCHDOG
CONFIG_S3C2410_WATCHDOG
CONFIG_EP93XX_WATCHDOG
CONFIG_OMAP_WATCHDOG
CONFIG_PNX4008_WATCHDOG
CONFIG_IOP_WATCHDOG
CONFIG_ORION_WATCHDOG
CONFIG_SUNXI_WATCHDOG
CONFIG_COH901327_WATCHDOG
CONFIG_TWL4030_WATCHDOG
CONFIG_STMP3XXX_RTC_WATCHDOG
CONFIG_MAX63XX_WATCHDOG
CONFIG_UX500_WATCHDOG
CONFIG_RETU_WATCHDOG
CONFIG_IE6XX_WDT
CONFIG_ITCO_WDT
CONFIG_KEMPLD_WDT
CONFIG_VIA_WDT
CONFIG_BCM47XX_WDT
CONFIG_JZ4740_WDT
CONFIG_TXX9_WDT
CONFIG_OCTEON_WDT
CONFIG_BCM2835_WDT
CONFIG_BOOKE_WDT
CONFIG_MEN_A21_WDT
CONFIG_SH_WDT