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xen/balloon: Move dec_totalhigh_pages() from __balloon_append() to balloon_append() 

git commit 9be4d45759 (xen: add
extra pages to balloon) splited balloon_append() into two functions
(balloon_append() and __balloon_append()) and left decrementation
of totalram_pages counter in __balloon_append(). In this situation
if __balloon_append() is called on i386 with highmem page referenced
then totalhigh_pages is decremented, however, it should not. This
patch corrects that issue and moves dec_totalhigh_pages() from
__balloon_append() to balloon_append(). Now totalram_pages and
totalhigh_pages are decremented simultaneously only when
balloon_append() is called.

Acked-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Signed-off-by: Daniel Kiper <dkiper@net-space.pl>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Daniel Kiper 2011-03-28 11:35:59 +02:00 committed by Konrad Rzeszutek Wilk
parent 83be7e52d4
commit 09ca132a8e
1 changed files with 3 additions and 2 deletions
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5
drivers/xen/balloon.c
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@ -114,7 +114,6 @@ static void __balloon_append(struct page *page)
if (PageHighMem(page)) {
list_add_tail(&page->lru, &ballooned_pages);
balloon_stats.balloon_high++;
dec_totalhigh_pages();
} else {
list_add(&page->lru, &ballooned_pages);
balloon_stats.balloon_low++;
@ -124,6 +123,8 @@ static void __balloon_append(struct page *page)
static void balloon_append(struct page *page)
{
__balloon_append(page);
if (PageHighMem(page))
dec_totalhigh_pages();
totalram_pages--;
}
@ -462,7 +463,7 @@ static int __init balloon_init(void)
pfn < extra_pfn_end;
pfn++) {
page = pfn_to_page(pfn);
/* totalram_pages doesn't include the boot-time
/* totalram_pages and totalhigh_pages do not include the boot-time
balloon extension, so don't subtract from it. */
__balloon_append(page);
}