Re: [Xen-devel] vnc=1 / pvgrub / close fb: backend at /local/domain/0/backend/vfb/xx/0

[Samuel Thibault <samuel.thibault@xxxxxxxxxxxx>]

Ian Campbell, le Wed 22 Oct 2014 10:00:36 +0100, a écrit :
> On Wed, 2014-10-22 at 08:24 +1100, Steven Haigh wrote:
> > As a side note to this - if I use pygrub as a bootloader vs using
> > pvgrub, then VNC works perfectly.
> > 
> > So, what options exist to make pvgrub behave properly for booting with
> > VNC enabled?
> 
> ISTR (vaguely) that way back when the backends needed to be modified to
> cope with kexec (which is effectively what pvgrub does) by not exiting
> when the frontend disconnects, instead sticking around waiting for a new
> frontend, this relates somehow to the "online" key in xenstore.
> 
> Perhaps the pvfb backend never got that treatment, which would explain
> #2? 

Probably, yes.

> That was ages ago (like 2005/6?)

2007-2008 :)

> so it seems a bit unlikely you'd be the first to try this and notice.

Well, I guess there aren't so many people who use both pv-grub and a
pvfb.

> I've no idea for #1 though.

I wonder too.

> Oh, is this with pvgrub 1 (the thing which ships with Xen) or pvgrub 2
> (from the upstream grub project fairly recently)? Your logs hint towards
> the former.

Yes, the logs definitely look like mini-os, thus pvgrub 1.

Samuel

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