It is expected that a watchdog module will disable an active watchdog when
its probe is called ie, when it is loaded. So an early load of the module
will help to disable it earlier.
This can be helpful in some corner cases where kdump and watchdog daemon
both are active.
Signed-off-by: Pratyush Anand <panand@xxxxxxxxxx>
Cc: Dave Young <dyoung@xxxxxxxxxx>
Cc: Don Zickus <dzickus@xxxxxxxxxx>
Cc: Harald Hoyer <harald@xxxxxxxxxx>
---
modules.d/04watchdog/module-setup.sh | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/modules.d/04watchdog/module-setup.sh b/modules.d/04watchdog/module-setup.sh
index 62e3fdf7829f..7667850ece8f 100755
--- a/modules.d/04watchdog/module-setup.sh
+++ b/modules.d/04watchdog/module-setup.sh
@@ -33,6 +33,7 @@ install() {
}
installkernel() {
+ wdtcmdline=""
cd /sys/class/watchdog
for dir in */; do
cd $dir
@@ -46,6 +47,7 @@ installkernel() {
# represented by modalias
wdtdrv=`modprobe -R $wdtdrv | tr "\n" "," | sed 's/.$//'`
instmods $wdtdrv
+ wdtcmdline="$wdtcmdline$wdtdrv,"
# however in some cases, we also need to check that if
# there is a specific driver for the parent bus/device.
# In such cases we also need to enable driver for parent
@@ -56,9 +58,14 @@ installkernel() {
wdtpdrv=`cat $wdtppath/modalias`
wdtpdrv=`modprobe -R $wdtpdrv | tr "\n" "," | sed 's/.$//'`
instmods $wdtpdrv
+ wdtcmdline="$wdtcmdline$wdtpdrv,"
wdtppath="$wdtppath/.."
done
fi
cd ..
done
+ # ensure that watchdog module is loaded as early as possible
+ if [[ $wdtcmdline ]]; then
+ echo "rd.driver.pre=$wdtcmdline" > ${initdir}/etc/cmdline.d/04-watchdog.conf
+ fi
}
--
2.5.0
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