FW: [Planetlab-devel] RE: pl/xen

[Marc E. Fiuczynski]

Hi David^2,

So Xen moved from page-flipping to copying between domains for network
traffic?!  Interesting.

Glad to hear that you got xenU kexec working.  Could you summarize what it
was you needed to get it to work in the first place.

Thanks,
Marc

p.s., for the benefit of others, please send email to devel rather than me
directly.  There are things you are sharing with me that are useful to
others on the list.  Thanks.

> -----Original Message-----
> From: deirwin at gmail.com [mailto:deirwin at gmail.com]On Behalf Of David
> Irwin
> Sent: Wednesday, November 22, 2006 11:03 AM
> To: Marc E. Fiuczynski
> Cc: David Becker; Jeff Chase
> Subject: Re: FW: [Planetlab-devel] RE: pl/xen
>
>
> Yea, can you send it?  I'd like to know how to build a new kernel.
>
> I actually did get the kernel you sent before kexec'ing correctly.
> The only problem is I can't bring eth0 up on your kernel (trying to
> bring it up crashes the VM).
>
> I think this may be due to the fact that my initial VM was set to use
> copying (rather than page flipping) for moving packets b/t domU and
> dom0.  The default for this was changed in xen-unstable sometime in
> October according to the changelogs.  Your kernel is probably using
> page-flipping (the old default).  I'm guessing the hypervisor may not
> like changing that without rebooting.  eth0 seems to work on other
> more recent kernels that appear to use copying.
>
> Thanks,
> -David
>
> On 11/21/06, Marc E. Fiuczynski <mef at cs.princeton.edu> wrote:
> > Doah... didn't send the build recipe.  Do you still need that?
> >
> > Marc
> >