From: Dan Shearer <dan@shearer.org>
To: Jeff Dike <jdike@addtoit.com>
Cc: Cameron Patrick <cameron@patrick.wattle.id.au>,
BlaisorBlade <blaisorblade_spam@yahoo.it>,
user-mode-linux-devel@lists.sourceforge.net, miquels@cistron.nl
Subject: Re: [uml-devel] mconsole telinit design, worry about init standards?
Date: Thu, 12 Feb 2004 15:10:15 +1030 [thread overview]
Message-ID: <20040212044015.GZ4203@erizo.shearer.org> (raw)
In-Reply-To: <200402120349.i1C3nFip009121@ccure.user-mode-linux.org>
On Wed, Feb 11, 2004 at 10:49:15PM -0500, Jeff Dike wrote:
> dan@shearer.org said:
> > Could you tell us what the rules are?
>
> The rule is - if it can be done in userspace, it is. And if it can't be done
> in userspace, you implement as little as possible in the kernel, and export
> an interface that lets the rest be done in userspace. C-A-D is a good example -
> you need to have the basic handler in the kernel, but the actual reaction to
> it is in init, and specified by inittab.
>
> So, the stuff that I'm willing to stick in the mconsole driver are things like
> diagnosing a sick UML (where you may not be able to start processes - mconsole
> proc, which barely passed muster with Al Viro) and pulling hardware in and
> out.
There is very little overlap between this and what I'm looking for,
which is a way of interacting with an unmodified Linux, initially a way
of getting it to do a clean init-style shutdown without introducing any
specific new tools.
What about the ability to inject ACPI commands to the kernel? So long as
the user has installed whatever standard tools their distro uses to
listen on /proc/acpi (2.4.x) or /sys/power (2.6.x) then there is a
reasonable chance we can run externally imposed shutdown/resume/halt
events. APM would perhaps be simpler but presumably support for APM will
reduce over time.
This would integrate nicely with swsuspend for UML.
--
Dan Shearer
dan@shearer.org
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next prev parent reply other threads:[~2004-02-12 4:38 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-06 0:37 [uml-devel] mconsole telinit design, worry about init standards? Dan Shearer
2004-02-06 5:42 ` Cameron Patrick
2004-02-07 15:33 ` BlaisorBlade
2004-02-09 0:11 ` Michael Richardson
2004-02-12 1:14 ` Jeff Dike
2004-02-12 1:47 ` Dan Shearer
2004-02-12 3:49 ` Jeff Dike
2004-02-12 4:40 ` Dan Shearer [this message]
2004-02-13 11:03 ` Miquel van Smoorenburg
2004-02-13 11:23 ` Dan Shearer
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