Driver core: add CONFIG_UEVENT_HELPER_PATH (6a8d8abb) · Commits · 戴 / test

The kernel creates a process for every event that is send, even when there is no binary it could execute. We are needlessly creating around 200-300 failing processes during early bootup, until we have the chance to disable it from userspace. This change allows us to disable /sbin/hotplug entirely, if you want to, by setting UEVENT_HELPER_PATH="" in the kernel config. Signed-off-by:

Kay Sievers <kay.sievers@vrfy.org> Signed-off-by:

Greg Kroah-Hartman <gregkh@suse.de>

drivers/base/Kconfig

+8 −0

Original line number	Diff line number	Diff line
		menu "Generic Driver Options"

		config UEVENT_HELPER_PATH
		string "path to uevent helper"
		depends on HOTPLUG
		default "/sbin/hotplug"
		help
		Path to uevent helper program forked by the kernel for
		every uevent.

		config STANDALONE
		bool "Select only drivers that don't need compile-time external firmware" if EXPERIMENTAL
		default y

lib/kobject_uevent.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -35,7 +35,7 @@ const char *kobject_actions[] = {

		#if defined(CONFIG_HOTPLUG)
		u64 uevent_seqnum;
		char uevent_helper[UEVENT_HELPER_PATH_LEN] = "/sbin/hotplug";
		char uevent_helper[UEVENT_HELPER_PATH_LEN] = CONFIG_UEVENT_HELPER_PATH;
		static DEFINE_SPINLOCK(sequence_lock);
		#if defined(CONFIG_NET)
		static struct sock *uevent_sock;

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