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CONFIG_UEVENT_HELPER_PATH: path to uevent helper

General informations

The Linux kernel configuration item CONFIG_UEVENT_HELPER_PATH:

• prompt: path to uevent helper
• type: string
• depends on: CONFIG_HOTPLUG
• defined in drivers/base/Kconfig
• found in Linux kernels: 2.6.24–2.6.39, 3.0–3.9, 3.10-rc+HEAD

Help text

Path to uevent helper program forked by the kernel for every uevent. Before the switch to the netlink-based uevent source, this was used to hook hotplug scripts into kernel device events. It usually pointed to a shell script at /sbin/hotplug. This should not be used today, because usual systems create many events at bootup or device discovery in a very short time frame. One forked process per event can create so many processes that it creates a high system load, or on smaller systems it is known to create out-of-memory situations during bootup.

To disable user space helper program execution at early boot time specify an empty string here. This setting can be altered via /proc/sys/kernel/hotplug or via /sys/kernel/uevent_helper later at runtime.

Hardware

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The data is retrived from:

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