Re: [PATCH 2/2] hotplug resource limitation

From: Greg KH
Date: Mon Aug 09 2004 - 19:11:38 EST


On Mon, Aug 09, 2004 at 03:07:15PM +0200, Hannes Reinecke wrote:
> Hi all,
> this is the second patch to implement hotplug resource limitation
> (relative to 2.6.7-rc2-mm2).
>
> In some cases it is preferrable to adapt the number of concurrent
> hotplug processes on the fly in addition to set the number statically
> during boot.

Why? This should be "auto-tuning". We don't want to provide
yet-another-knob-for-people-to-tweak-from-userspace, right?

> Additionally, it might be required to disable hotplug /
> kmod event delivery altogether for debugging purposes (e.g. if a module
> loaded automatically is crashing the machine).

Ugh, that's just not a good thing at all. You can do that by running:
echo /bin/true > /proc/sys/kernel/hotplug
today if you have to. I don't like the ability to stop the kernel from
running properly, like this patch allows you to.

thanks,

greg k-h
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