Advanced File Manager

✏️ Mengedit: kdump-udev-throttler

#!/usr/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"

LUKS_CONFIGFS_REUSE=/sys/kernel/config/crash_dm_crypt_keys/reuse
reuse_luks_keys()
{
	[[ -f $LUKS_CONFIGFS_REUSE ]] || echo 1 > $LUKS_CONFIGFS_REUSE
}

unuse_luks_keys()
{

[[ -f $LUKS_CONFIGFS_REUSE ]] || echo 0 > $LUKS_CONFIGFS_REUSE
}

if ! exec 9> $throttle_lock; then
	echo "Failed to create the lock file! Fallback to non-throttled kdump service restart"
	/bin/kdumpctl reload
	exit 1
fi

if ! flock -n 9; 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>&-

reuse_luks_keys
/bin/kdumpctl reload
unuse_luks_keys

exit 0

❌ Batal

Nama	Ukuran	Dimodifikasi	Permission	Aksi
📁 hwdb.d	-	2026-06-26 11:42	0755
📁 rules.d	-	2026-06-27 07:15	0755
📎 ata_id	19.3 KB	2026-06-25 00:28	0755	✏️ Edit ⬇
📎 cdrom_id	31.4 KB	2026-06-25 00:28	0755	✏️ Edit ⬇
📎 dmi_memory_id	27.4 KB	2026-06-25 00:28	0755	✏️ Edit ⬇
📎 fc_wwpn_id	1.1 KB	2021-01-04 06:17	0755	✏️ Edit ⬇
📎 fido_id	23.3 KB	2026-06-25 00:28	0755	✏️ Edit ⬇
📎 kdump-udev-throttler	1.6 KB	2026-04-08 18:11	0755	✏️ Edit ⬇
📎 kpartx_id	2.3 KB	2026-04-05 00:24	0755	✏️ Edit ⬇
📎 mtd_probe	15.2 KB	2026-06-25 00:28	0755	✏️ Edit ⬇
📎 prefixdevname	1.5 MB	2022-03-25 15:11	0755	✏️ Edit ⬇
📎 rename_device	15.3 KB	2025-03-12 19:47	0755	✏️ Edit ⬇
📎 scsi_id	36 KB	2026-06-25 00:28	0755	✏️ Edit ⬇
📎 v4l_id	15.2 KB	2026-06-25 00:28	0755	✏️ Edit ⬇

📂 Advanced File Manager

✏️ Mengedit: kdump-udev-throttler

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