Re: [PATCH] Enable all events for initramfs

["Alexander E. Patrakov" <patrakov@ums.usu.ru>]

Hannes Reinecke wrote:
> Hi all,
> 
> currently most driver events are not sent out when using initramfs as 
> driver_init() (which triggers the events) is called before init_workqueues.
> 
> This patch rearranges the init calls so that the hotplug event queue is 
> enabled prior to calling driver_init(), hence we're getting all hotplug 
> events again.
> 
> Patch is relative to 2.6.7-mm6, but should apply to 2.6.8-rc1 also.
> 
> Please apply.

This is probably a very good news.

I see the following application of it. Since no hotplug events are
dropped any more, the initramfs could save their type and environment in
files on a ramfs, and then remount that ramfs to some location
accessible by the main system. The information accumulated in these
files can be used for re-synthesis of events not handled because e.g.
/usr was not mounted.

This means that we can drop the udevstart program and *.rc files that
come with the hotplug package and replace them by playback of such
recorded events. This looks much cleaner, since right now the
reconstruction is imperfect.

I will try to implement this approach (i.e, create initramfs and modify
the hotplug and udev packages) during this week on a copy of Linux From
Scratch 20040702, and report the results here.

-- 
Alexander E. Patrakov



-------------------------------------------------------
This SF.Net email sponsored by Black Hat Briefings & Training.
Attend Black Hat Briefings & Training, Las Vegas July 24-29 - 
digital self defense, top technical experts, no vendor pitches, 
unmatched networking opportunities. Visit www.blackhat.com
_______________________________________________
Linux-hotplug-devel mailing list  http://linux-hotplug.sourceforge.net
Linux-hotplug-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-hotplug-devel