IP : 18.116.87.70Hostname : host45.registrar-servers.comKernel : Linux host45.registrar-servers.com 4.18.0-513.18.1.lve.2.el8.x86_64 #1 SMP Sat Mar 30 15:36:11 UTC 2024 x86_64Disable Function : None :) OS : Linux
PATH:
/
home/
./
../
lib/
dracut/
../
./
kdump/
../
./
environment.d/
../
udev/
kdump-udev-throttler/
/
#!/bin/bash # This util helps to reduce the workload of kdump service restarting # on udev event. When hotplugging memory / CPU, multiple udev # events may be triggered concurrently, and obviously, we don't want # to restart kdump service for each event.
# This script will be called by udev, and make sure kdump service is # restart after all events we are watching are settled.
# On each call, this script will update try to aquire the $throttle_lock # The first instance acquired the file lock will keep waiting for events # to settle and then reload kdump. Other instances will just exit # In this way, we can make sure kdump service is restarted immediately # and for exactly once after udev events are settled.
throttle_lock="/var/lock/kdump-udev-throttle"
exec 9>$throttle_lock if [ $? -ne 0 ]; then echo "Failed to create the lock file! Fallback to non-throttled kdump service restart" /bin/kdumpctl reload exit 1 fi
flock -n 9 if [ $? -ne 0 ]; then echo "Throttling kdump restart for concurrent udev event" exit 0 fi
# Wait for at least 1 second, at most 4 seconds for udev to settle # Idealy we will have a less than 1 second lag between udev events settle # and kdump reload sleep 1 && udevadm settle --timeout 3
# Release the lock, /bin/kdumpctl will block and make the process # holding two locks at the same time and we might miss some events exec 9>&-