RE: [Xen-ia64-devel] [PATCH] Fix that guest can not get continuous memory for vhpt

["Zhang, Yang" <yang.zhang@xxxxxxxxx>]

Ok, I will modify it.
Thanks 
Best Regards
--yang

>-----Original Message-----
>From: Isaku Yamahata [mailto:yamahata@xxxxxxxxxxxxx]
>Sent: 2009年2月19日 13:33
>To: Zhang, Yang
>Cc: xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
>Subject: Re: [Xen-ia64-devel] [PATCH] Fix that guest can not get continuous
>memory for vhpt
>
>On Thu, Feb 19, 2009 at 01:11:53PM +0800, Zhang, Yang wrote:
>> Hi
>>
>> >From: Isaku Yamahata [mailto:yamahata@xxxxxxxxxxxxx]
>> >Sent: 2009年2月19日 11:12
>> >To: Zhang, Yang
>> >Cc: xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
>> >Subject: Re: [Xen-ia64-devel] [PATCH] Fix that guest can not get continuous
>> >memory for vhpt
>> >- It is a poor approach to introduce new HVM_PARAM_VHPT_SIZE.
>> >  This is inconsistent with XEN_DOMCTL_arch_setup by which libxc tells
>> >  VMM vhpt size of PV domain.
>> >  So the first idea which came into my mind is to call
>> >  XEN_DOMCTL_ARCH_setup before populating domain memory.
>> >  I haven't checked if it's possible or not, though. Maybe we can introduce
>> >  new XEN_DOMAINSETUP_xxx flag.
>>      I doesn't introduce HVM_PARAM_VHPT_SIZE. The hvm needs it to save the
>vhpt'size for allocating vhpt's memory when vcpu boot. I just add some code to
>save memory for vhpt beforehand when libxc tells VMM vhpt size of  hvm. And I
>don't think PV domain need to do this.
>
>Oh, sorry. I misread it. Okay, so the approach looks sane.
>
>- The functions newly added in arch/ia64/xen/domain.c are hvm domain
>  specific. So please move them under arch/ia64/xen/vmx/.
>
>- The pages for vhpt is allocated by alloc_domheap_pages(NULL, ...),
>  Thus those memory doesn't accounted to the domain.
>  So adjusting domain memory size doesn't make sense. Just drop it.
>
>- Is vhpt_page[] really necessary?
>  How about setting hcb->hash directly instead of temporary
>  keeping it in vhpt_page[]?
>  Probably adjusting codes of resource allocating/freeing might be required,
>  though.
>
>thanks,
>--
>yamahata

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