diff options
| author | Daniel Kiper <dkiper@net-space.pl> | 2011-03-28 11:35:59 +0200 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2011-03-30 11:54:51 -0400 |
| commit | 09ca132a8e469f87504899b4016c7517511887d0 (patch) | |
| tree | 200a42859eb84ef88eefe2b5f5d4e798ce44a1a7 /drivers/xen | |
| parent | 83be7e52d46a5b3a9955a38a9597bf1de1851ea7 (diff) | |
xen/balloon: Move dec_totalhigh_pages() from __balloon_append() to balloon_append()
git commit 9be4d4575906af9698de660e477f949a076c87e1 (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>
Diffstat (limited to 'drivers/xen')
| -rw-r--r-- | drivers/xen/balloon.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c index a6d8e59e453..f54290baa3d 100644 --- a/drivers/xen/balloon.c +++ b/drivers/xen/balloon.c @@ -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); } |