WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

Re: [Xen-devel] Xen + other stuff?

On 13 Nov 2003, at 20:26, Keir Fraser wrote:

With CONFIG_HIGHMEM, Linux no longer needs a permanent mapping for
every page it owns. Pages in high memory can be temporarily mapped in
(just as the domain builder does in user space). We'll port this
config option real soon now, and that will mean that every Xenolinux
instance could be allocated anything up to 4GB.

 -- Keir


To add, currently there are two modes of High Memory support:

(1)4G: It uses 2 level page table entry + dynamic mapping so that
each (Xeno)Linux instance can use anything up to 4G of physical
memory.

(2)64G: It uses 3 level PAE page table entry + dynamic mapping
so that each (Xeno)Linux instance can use anything up to 64G
of physical memory.


-- Bin



-------------------------------------------------------
This SF.Net email sponsored by: ApacheCon 2003,
16-19 November in Las Vegas. Learn firsthand the latest
developments in Apache, PHP, Perl, XML, Java, MySQL,
WebDAV, and more! http://www.apachecon.com/
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxxx
https://lists.sourceforge.net/lists/listinfo/xen-devel