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xen: switch extra memory accounting to use pfns

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Instead of using physical addresses for accounting of extra memory
areas available for ballooning switch to pfns as this is much less
error prone regarding partial pages.

Reported-by: Roger Pau Monné <[email protected]>
Tested-by: Roger Pau Monné <[email protected]>
Signed-off-by: Juergen Gross <[email protected]>
Signed-off-by: David Vrabel <[email protected]>
This commit is contained in:
Juergen Gross 2015-09-04 14:05:51 +02:00 • committed by David Vrabel
commit 626d750866
3 changed files with 49 additions and 41 deletions
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6
drivers/xen/balloon.c
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@ -638,9 +638,9 @@ static int __init balloon_init(void)
* regions (see arch/x86/xen/setup.c).
*/
for (i = 0; i < XEN_EXTRA_MEM_MAX_REGIONS; i++)
if (xen_extra_mem[i].size)
balloon_add_region(PFN_UP(xen_extra_mem[i].start),
PFN_DOWN(xen_extra_mem[i].size));
if (xen_extra_mem[i].n_pfns)
balloon_add_region(xen_extra_mem[i].start_pfn,
xen_extra_mem[i].n_pfns);
return 0;
}