RE: [Xen-ia64-devel] shared_info and privregs

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

>From: Tristan Gingold
>Sent: 2006年5月15日 16:17
>Hi,
>
>currently shared_info and privregs are allocated on xenheap.
>I propose to allocate them on domheap and to map these pages on
>domain pseudo
>physical memory.
>I think this is more logical and will help for save and restore (make them
>accessible by dom0).
>
>Comments ?
>
>Tristan.
>

Hi, Tristan,
        Following link talks some background about why shared_info is 
allocated from xenheap:
http://lists.xensource.com/archives/html/xen-devel/2006-01/msg00258.html
        For xen/ia64, to allocate shared_info from domheap faces less 
boring issues as x86, but you have to consider several common issues 
like refcnt or domain statistic accounting mentioned from the thread. I 
believe those can be worked around, but you may check whether worthy 
of doing that. :-)

        BTW, it may be a good idea to add shared_info page (even from 
xeneheap) into the domain's pseudo memory space, especially when 
current ia64 dom0 is based on p!=m model. In that way, dom0 can simply 
map all domain's memory including shared_info by uniform interface. 

        Hope helps a bit.

Thanks,
Kevin

_______________________________________________
Xen-ia64-devel mailing list
Xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-ia64-devel