Xen devel - Jul 2006 - [PATCH][XEND]Fix memory allocation for VTi domain with new Qemu on xen-unstagle.hg

Due to IA64 balloon driver not ready and it depends on max memory value
to allocate its memory. So this fix is necessary now.
Thanks & Best Regards
-Xiantao

OTC,Intel Corporation



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On 25 Jul 2006, at 02:59, Zhang, Xiantao wrote:
> Due to IA64 balloon driver not ready and it depends on max memory value
> to allocate its memory. So this fix is necessary now.
> Thanks & Best Regards
> -Xiantao
Can you explain how introduction of new qemu code has made this change 
necessary? I''m surprised it would be affected by maxmem setting, 
particularly in a different way to the older qemu code we were using 
previously.

  -- Keir


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Hi Keir,
	Thank you for your comments. This should be a temporary solution for IA64 side.
Currently, VTi assumes domain''s total pages == max_pages at creation
time. In addition, VTi guest doesn''t support maxmem option in
configuration file. Current code will assume domain''s maxmem ==
domain''s memory which doesn''t include guest FW and xenstore
and IO share page when no option for maxmem in configuration file. And XC will
call domain_memory_increase_reservation to reserve memory for domain with a
large memory value which includes domain''s memory, guest FW size  and
IO share page, so hypervisor will complain no more memory can be assigned to
this domain. Once balloon driver is ready @IA64 side, we will handle it like
IA32. Can it be a workaround now?
Thanks & Best Regards
-Xiantao

OTC,Intel Corporation
> -----Original Message-----
> From: Keir Fraser [mailto:Keir.Fraser@cl.cam.ac.uk]
> Sent: 2006年7月25日 18:23
> To: Zhang, Xiantao
> Cc: xen-devel@lists.xensource.com; xen-ia64-devel@lists.xensource.com
> Subject: Re: [Xen-devel] [PATCH][XEND]Fix memory allocation for VTi domain
> with new Qemu on xen-unstagle.hg
> 
> 
> On 25 Jul 2006, at 02:59, Zhang, Xiantao wrote:
> 
> > Due to IA64 balloon driver not ready and it depends on max memory
value
> > to allocate its memory. So this fix is necessary now.
> > Thanks & Best Regards
> > -Xiantao
> 
> Can you explain how introduction of new qemu code has made this change
> necessary? I''m surprised it would be affected by maxmem setting,
> particularly in a different way to the older qemu code we were using
> previously.
> 
>   -- Keir
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