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RE: [Xen-users] GPLPV under NetBSD dom0

To: "Dustin Marquess" <dmarquess@xxxxxxxxx>
Subject: RE: [Xen-users] GPLPV under NetBSD dom0
From: "James Harper" <james.harper@xxxxxxxxxxxxxxxx>
Date: Fri, 30 Oct 2009 14:10:03 +1100
Cc: xen-users <xen-users@xxxxxxxxxxxxxxxxxxx>
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Thread-topic: [Xen-users] GPLPV under NetBSD dom0
> > Just as a test, and you'll have to be fast, as soon as you see
'Still
> > waiting for 2 (currently 4)', manually set the backend state to 2,
and
> > then back to 4, eg:
> >
> > xenstore-write /local/domain/0/backend/vbd/<domid>/768 2
> > xenstore-write /local/domain/0/backend/vbd/<domid>/768 4
> >
> > GPLPV expects to see the backend state go to 2 and then to 4, not
direct
> > to 4. I need to investigate that a bit more as it has caused
problems
> > before with other backends (tap:aio etc) before.
> >
> > If that works let me know and I'll see what I can do.
> 
> I tried this a few times and ended up pulling my hair.  After some
> poking around, I realized I needed to add "/state" to the path.

Oops. Sorry :(

> Once
> I did that, surprise surprise... it worked!

> 
> On an unrelated note... WinDbg is getting spammed with:
> 
> XenNet     Error: rxrsp offset 16, size -1
> XenNet     Error: rxrsp offset 16, size -1
> XenNet     Error: rxrsp offset 16, size -1
> XenNet     Error: rxrsp offset 16, size -1
> 
> And my dom0 dmesg is getting spammed with:
> 
> xvif18.1: req_prod 713 req_cons 466 rsp_prod 465 rsp_prod_pvt 465 i 1
> xvif18.1 GNTTABOP_transfer[0] -1
> xvif18.1: req_prod 713 req_cons 467 rsp_prod 466 rsp_prod_pvt 466 i 1
> xvif18.1 GNTTABOP_transfer[0] -1
> xvif18.1: req_prod 713 req_cons 468 rsp_prod 467 rsp_prod_pvt 467 i 1
> xvif18.1 GNTTABOP_transfer[0] -1
> xvif18.1: req_prod 713 req_cons 469 rsp_prod 468 rsp_prod_pvt 468 i 1
> 
> So I assume there's a problem with the network driver.  However at
> least it's booting at not BSOD'ing, so it's a step in the right
> direction!
> 

Can you turn off scatter gather under the driver properties in Windows?
I remember that Solaris Dom0 had that problem, but thought I had made
GPLPV automatically disable SG if it wasn't explicitly marked as
supported in the Dom0 backend.

James

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