forge/linux-pinenote
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

xen: allow balloon driver to use more than one memory region

Browse source 
Allow the xen balloon driver to populate its list of extra pages from
more than one region of memory.  This will allow platforms to provide
(for example) a region of low memory and a region of high memory.

The maximum possible number of extra regions is 128 (== E820MAX) which
is quite large so xen_extra_mem is placed in __initdata.  This is safe
as both xen_memory_setup() and balloon_init() are in __init.

The balloon regions themselves are not altered (i.e., there is still
only the one region).

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
David Vrabel 2011-09-28 17:46:34 +01:00 • committed by Konrad Rzeszutek Wilk
parent b1cbf9b1d6
commit 8b5d44a5ac
3 changed files with 46 additions and 28 deletions
Download patch file Download diff file Expand all files Collapse all files

10
include/xen/page.h
View file

@ -3,7 +3,15 @@
#include <asm/xen/page.h>
extern phys_addr_t xen_extra_mem_start, xen_extra_mem_size;
struct xen_memory_region {
phys_addr_t start;
phys_addr_t size;
};
#define XEN_EXTRA_MEM_MAX_REGIONS 128 /* == E820MAX */
extern __initdata
struct xen_memory_region xen_extra_mem[XEN_EXTRA_MEM_MAX_REGIONS];
extern unsigned long xen_released_pages;