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#!/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"

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>&-

/bin/kdumpctl reload

exit 0

Batal

⬅ lib 17 item

Nama	Tipe	Ukuran	Diubah	Aksi
📁hwdb.d	dir	—	2026-03-21 15:48	📂 Buka
📁rules.d	dir	—	2026-03-21 15:55	📂 Buka
📄ata_id	file	19.3 KB	2025-12-04 08:27	✏️ 👁️
📄cdrom_id	file	31.4 KB	2025-12-04 08:27	✏️ 👁️
📄dmi_memory_id	file	27.4 KB	2025-12-04 08:27	✏️ 👁️
📄fc_wwpn_id	file	1.1 KB	2021-01-04 06:17	✏️ 👁️
📄fido_id	file	23.3 KB	2025-12-04 08:27	✏️ 👁️
📄kdump-udev-throttler	file	1.4 KB	2025-09-24 06:15	✏️ 👁️
📄kpartx_id	file	2.3 KB	2026-01-28 09:19	✏️ 👁️
📄libinput-device-group	file	19.1 KB	2026-03-11 14:16	✏️ 👁️
📄libinput-fuzz-extract	file	15.1 KB	2026-03-11 14:16	✏️ 👁️
📄libinput-fuzz-to-zero	file	15.1 KB	2026-03-11 14:16	✏️ 👁️
📄mtd_probe	file	15.2 KB	2025-12-04 08:27	✏️ 👁️
📄prefixdevname	file	1.5 MB	2022-03-25 15:11	✏️ 👁️
📄rename_device	file	15.2 KB	2025-05-14 14:50	✏️ 👁️
📄scsi_id	file	36 KB	2025-12-04 08:27	✏️ 👁️
📄v4l_id	file	15.2 KB	2025-12-04 08:27	✏️ 👁️

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