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authorVladimir Zapolskiy <vladimir_zapolskiy@mentor.com>2016-10-07 15:39:56 +0300
committerWim Van Sebroeck <wim@iguana.be>2016-10-08 10:27:17 +0200
commitda0d12ff2b829a35e9921918e925d79497b82bef (patch)
tree6c72ee5f9d3b26a9cb23baed655545b52559aba4 /drivers/watchdog/Kconfig
parentf77710c4cda01ad9c3672fb2f97bdea9a94da92a (diff)
watchdog: pretimeout: add panic pretimeout governor
The change adds panic watchdog pretimeout governor, on watchdog pretimeout event the kernel shall panic. In general watchdog pretimeout event means that something essentially bad is going on the system, for example a process scheduler stalls or watchdog feeder is killed due to OOM, so printing out information attendant to panic and before likely unavoidable reboot caused by a watchdog may help to determine a root cause of the issue. Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'drivers/watchdog/Kconfig')
-rw-r--r--drivers/watchdog/Kconfig14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 4aeb8f95beb4..cbd33321c0f8 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -1856,6 +1856,14 @@ config WATCHDOG_PRETIMEOUT_DEFAULT_GOV_NOOP
governor is selected by a user, write a short message to
the kernel log buffer and don't do any system changes.
+config WATCHDOG_PRETIMEOUT_DEFAULT_GOV_PANIC
+ bool "panic"
+ select WATCHDOG_PRETIMEOUT_GOV_PANIC
+ help
+ Use panic watchdog pretimeout governor by default, if
+ a watchdog pretimeout event happens, consider that
+ a watchdog feeder is dead and reboot is unavoidable.
+
endchoice
config WATCHDOG_PRETIMEOUT_GOV_NOOP
@@ -1864,6 +1872,12 @@ config WATCHDOG_PRETIMEOUT_GOV_NOOP
Noop watchdog pretimeout governor, only an informational
message is added to kernel log buffer.
+config WATCHDOG_PRETIMEOUT_GOV_PANIC
+ tristate "Panic watchdog pretimeout governor"
+ help
+ Panic watchdog pretimeout governor, on watchdog pretimeout
+ event put the kernel into panic.
+
endif # WATCHDOG_PRETIMEOUT_GOV
endif # WATCHDOG