* Re: [gentoo-user] uevent_helper on kernel 3.16.5-gentoo
@ 2014-10-24 11:47 99% ` Neil Bothwick
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From: Neil Bothwick @ 2014-10-24 11:47 UTC (permalink / raw
To: gentoo-user
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On Fri, 24 Oct 2014 12:36:44 +0100, Mick wrote:
> I understand that udev needs or used to need uevent_helper, but I am
> not clear if I should or should not enable this module in a new kernel
> I'm rolling. Can you please advise:
>
>
> CONFIG_UEVENT_HELPER:
>
> The uevent helper program is 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.
It's a legacy setting, introduced so you can turn off this feature.
Presumably it defaults to Y for compatibility but I've been following the
advice and running without it for some time now - on desktops and servers.
--
Neil Bothwick
WinErr 004: Erroneous error - Nothing is wrong
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