Re: [Xen-devel] [V3 PATCH 9/9] pvh dom0: add opt_dom0pvh to setup.c

[Mukesh Rathor <mukesh.rathor@xxxxxxxxxx>]

On Mon, 2 Dec 2013 12:46:49 -0800
Mukesh Rathor <mukesh.rathor@xxxxxxxxxx> wrote:

> On Mon, 2 Dec 2013 12:38:12 -0800
> Mukesh Rathor <mukesh.rathor@xxxxxxxxxx> wrote:
> 
> > On Mon, 2 Dec 2013 20:38:26 +0100
> > Roger Pau Monnà <roger.pau@xxxxxxxxxx> wrote:
> > 
> > > On 02/12/13 20:30, Mukesh Rathor wrote:
> > > > On Mon, 2 Dec 2013 16:09:50 +0100
> > > > Roger Pau Monnà <roger.pau@xxxxxxxxxx> wrote:
> > > > 
> > ......
> > > Thanks for the input, I haven't been able to do much debugging,
> > > but AFAICT the problem comes from alloc_vcpu_guest_context
> > > returning NULL, because alloc_domheap_page(NULL, 0) inside of
> > > that function also returned NULL (not able to allocate a page).
> > > 
> > > I'm currently using your tree for both Linux (branch tmp2) and Xen
> > > (branch dom0pvh-v3), no added or removed patches (only the line
> > > mentioned above in order to boot Dom0 in PVH mode).
> > > 
> > > Can you confirm you are able to boot a PVH Dom0 from you Xen and
> > > Linux trees?
> > 
> > yes, I'd not be submitting the patches otherwise ;)..
> > 
> > Name                                        ID   Mem VCPUs
> > State   Time(s) Domain-0                                     0
> > 1200     3     r-----    6250.6
> 
> FWIW, here's my command line:
> 
>         kernel /xen.hybrid.kdb console=com1,vga com1=57600,8n1
> dom0_mem=1200M maxcpus=4 dom0_max_vcpus=3 noreboot sync_console
> dom0pvh module /bzImage.hyb ro root=/dev/sda10 console=tty
> console=hvc0,57600n8
> 
> 
> Something is going with memory on your system looks like, the line 
> 
>     Released 18446744073708661104 pages of unused memory
> 
> is worrysome. May be start with dom0_mem and see if that makes a
> difference?
> 
> OTOH, after I am done cranking out another dom0 version with Jan's
> comments, I'll try out on my system without dom0_mem specified. That
> make take a day or two.


Roger, 

I'm able to reproduce by not specifying dom0_mem option. Will debug
linux tomorrow to see what's going on. JFYI.

thanks
Mukesh


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