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authorStefano Stabellini <stefano.stabellini@eu.citrix.com>2011-09-29 14:57:55 +0400
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2011-09-29 17:56:52 +0400
commit693394b8c3dcee1a3baa52e30fdc3323d88cd579 (patch)
tree5afa5342abce4d79ef9510b2c61efebc16b937b5 /drivers/xen/balloon.c
parent0f4b49eaf25e661fbe63a5370b7781166b34d616 (diff)
downloadlinux-693394b8c3dcee1a3baa52e30fdc3323d88cd579.tar.xz
xen: add an "highmem" parameter to alloc_xenballooned_pages
Add an highmem parameter to alloc_xenballooned_pages, to allow callers to request lowmem or highmem pages. Fix the code style of free_xenballooned_pages' prototype. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/xen/balloon.c')
-rw-r--r--drivers/xen/balloon.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index 5dfd8f8ff07f..cd8b4704ef4e 100644
--- a/drivers/xen/balloon.c
+++ b/drivers/xen/balloon.c
@@ -501,20 +501,24 @@ EXPORT_SYMBOL_GPL(balloon_set_new_target);
* alloc_xenballooned_pages - get pages that have been ballooned out
* @nr_pages: Number of pages to get
* @pages: pages returned
+ * @highmem: highmem or lowmem pages
* @return 0 on success, error otherwise
*/
-int alloc_xenballooned_pages(int nr_pages, struct page** pages)
+int alloc_xenballooned_pages(int nr_pages, struct page **pages, bool highmem)
{
int pgno = 0;
struct page* page;
mutex_lock(&balloon_mutex);
while (pgno < nr_pages) {
- page = balloon_retrieve(true);
- if (page) {
+ page = balloon_retrieve(highmem);
+ if (page && PageHighMem(page) == highmem) {
pages[pgno++] = page;
} else {
enum bp_state st;
- st = decrease_reservation(nr_pages - pgno, GFP_HIGHUSER);
+ if (page)
+ balloon_append(page);
+ st = decrease_reservation(nr_pages - pgno,
+ highmem ? GFP_HIGHUSER : GFP_USER);
if (st != BP_DONE)
goto out_undo;
}