22 messages in com.xensource.lists.xen-develRe: [Xen-devel] NetBSD port and a cou...
FromSent OnAttachments
Christian Limpach27 Jan 2004 12:59 
Kip Macy27 Jan 2004 23:43 
Ian Pratt28 Jan 2004 00:07 
Steven Hand28 Jan 2004 02:49 
Ian Pratt28 Jan 2004 03:23 
Christian Limpach28 Jan 2004 06:54 
Christian Limpach28 Jan 2004 08:22 
Steven Hand28 Jan 2004 08:37 
Keir Fraser28 Jan 2004 08:50 
Kip Macy28 Jan 2004 09:05 
Christian Limpach28 Jan 2004 09:06 
Christian Limpach28 Jan 2004 10:35 
Ian Pratt28 Jan 2004 11:03 
Kip Macy28 Jan 2004 13:28 
Andi Kleen28 Jan 2004 14:59 
Kip Macy28 Jan 2004 15:09 
Andi Kleen28 Jan 2004 15:24 
Kip Macy28 Jan 2004 15:48 
Larry McVoy28 Jan 2004 16:18 
Kip Macy28 Jan 2004 16:31 
John Szakmeister29 Jan 2004 03:13 
Thorsten Glaser12 Mar 2005 12:58 
Subject:Re: [Xen-devel] NetBSD port and a couple of remarks
From:Christian Limpach (chr@pin.lu)
Date:01/28/2004 06:54:18 AM
List:com.xensource.lists.xen-devel

Out of interest, how many man hours do you think it took you? I'm very impressed you managed to figure the Xen i/f out on your own without any help from Keir and the rest of us.

I think I spent 8-10 hours each day between 1/11 and 1/20 and after that it was more sporadic, another 10 on 1/22 and about 4 each on 1/25 and 1/27. I'd think between 95 and 120 hours total. I also noted some milestones: - 1/11/2004: started with linux/mini-os install/experimentation - 1/12/2004: add mini-os startup to NetBSD startup and make it load/start - 1/12/2004: add arch/xeno tree - 1/14/2004: add minimal console output support - 1/17/2004: add timer event processing - 1/17/2004: started work on xennet network driver - 1/18/2004: pmap pd/pt/pa/ma cleanup - 1/19/2004: hardclock call from timer event works - 1/20/2004: boot init until cnopen over nfs - 1/22/2004: add console device - 1/22/2004: integrate Xen events into NetBSD interrupt system - 1/25/2004: add npx support - 1/27/2004: multi-user boot over nfs

I spend quite some time figuring out how some of the i386 cpu features actually work (pagetable/GDT/LDT/TSS), how they are used in NetBSD and how to rewrite using the Xen hypercalls.

There's been a few fixes and improvements for the hypervisor i/f in the 1.2 tree, but I don't think it will take long to forward port NetBSD.

We'll investigate your specific bug reports.

Good!

I hope to commit this to the NetBSD tree eventually. Or I'll make patches available after some cleaning up.

Great! We'd be very pleased to put the patches in the xen distribution in the meantime, as soon as you're ready.

Thanks. I'll probably have a patch ready in a few days and I'll also know if/how it gets into the NetBSD tree.

There's a pretty recent src/binary tar ball in: www.cl.cam.ac.uk/netos/xen/downloads/xeno-1.2.tar.gz

It's still in the form of a BK repository, but all of the files are checked out.

Thanks!

BTW: I offered to buy dinner for anyone that did an OS port. I hope you'll take me up on that offer...

Oh, excellent! ;-)

christian

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