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RE: [Xen-devel] Re: almost working

To: Ian Pratt <Ian.Pratt@xxxxxxxxxxxx>
Subject: RE: [Xen-devel] Re: almost working
From: James Harper <JamesH@xxxxxxxxxxxxxxxx>
Date: Sat, 3 Jul 2004 20:24:54 +1000
Cc: Ian Pratt <Ian.Pratt@xxxxxxxxxxxx>, Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxxx>
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Thread-topic: [Xen-devel] Re: almost working
If devfs is indeed disappearing in 2.6 then there's probably not a lot of point adding support for it. Debian can use it, but I don't think it's enabled by default. I like the way devfs works but obviously most people don't.
What are the meanings of 'state'? I see dom0 as 'r----', and dom1 (when it works) appears as '-b---', and when it doesn't it appears with a 'p' somewhere in there. I would have thought that 'b' means booting, and it should then progress to 'r' meaning running.
I was thinking about a hostfs option for automatically copying in the modules in at boot time. My network configuration doesn't actually enable networking until it has started the firewall, which it can't because the modules aren't loaded. Being on the todo list sounds promising!

From: Ian Pratt
Sent: Sat 3/07/2004 1:21 AM
To: James Harper
Cc: Ian Pratt; Keir Fraser; xen-devel@xxxxxxxxxxxxxxxxxxxxx; Ian.Pratt@xxxxxxxxxxxx
Subject: [Xen-devel] Re: almost working

> I am once again able to boot a xenU kernel after removing all traces of devfs. *yay*

Excellent. Success stories are good to hear.

> can't say for sure if it was devfs though as i did a bk pull just before I sent my last email...

I suspect adding devfs support wouldn't be too hard, but its
probably not high on the list of priorities for us. Do any
common distros use it by default?

> having booted my new domain, 'xm list' in dom0 hung for ages with 100% cpu time until I hit ctrl-C. trying it again worked fine though.

Not good. I think xend is getting more robust over time.

> halting the new domain from the console causes it to disappear from 'xm list' correctly, but it won't restart properly, and then 'xm destroy, won't remove it from 'xm list'.

So: you started a domain, halted it, and it correctly
disappeared. You then issued the same xm create command to
recreate it and it failed to come up.

Odd. Any error output from xend or xm?

> lastly, is there a plan to be able to export a filesystem rather than just block devices, like 'hostfs' under uml? It would make copying modules over a bit easier!

How about using NFS for the moment?

It would be nice to add a super-fast page flipping filesystem
interface, but its on the todo list.


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