Re: [Xen-devel] [PATCH 3 of 7] Make suspend return 1 when a domain is resumed

[Keir Fraser <keir@xxxxxxxxxxxxx>]

On 19/1/07 16:36, "Brendan Cully" <brendan@xxxxxxxxx> wrote:

> sorry, that was a bad comment. I'd been using "resume" to mean
> suspend-cancel and "reconnect" to mean run in a new domain. This patch
> is the backwards compatible version (it sets EAX to 1 in xc_linux_save
> rather than xc_linux_restore).

Oh, I see. Makes sense.

> I poked around the elfnote route for advertising kernel features to
> xend, and I have a feeling someone else should be designing the API
> for that - I only want very little out of it and would probably be
> shortsighted. For instance, it wasn't clear to me whether it'd be
> better to have an xc function that returns almost raw elfnotes (an
> array of (type, length, contents)) or only parsed, named elfnotes, or
> only features.

The xenctrl function that pulls out the elfnote info is going to need to
know about specific elfnotes, the type of contents, and have a sensible
strategy for stringifying them. I suggest (type, contents) pairs where type
is the elfnote type name, and contents is content-specific string. There are
lots of elfnotes so you only need worry about the elfnote you care about
(your new one) -- all I want is a framework where we can extract more
elfnotes as and when we need to.

 -- Keir


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