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authorStefano Stabellini <stefano.stabellini@eu.citrix.com>2011-09-29 11:57:55 +0100
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2011-09-29 09:56:52 -0400
commit693394b8c3dcee1a3baa52e30fdc3323d88cd579 (patch)
tree5afa5342abce4d79ef9510b2c61efebc16b937b5
parent0f4b49eaf25e661fbe63a5370b7781166b34d616 (diff)
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>
-rw-r--r--drivers/xen/balloon.c12
-rw-r--r--drivers/xen/gntdev.c2
-rw-r--r--include/xen/balloon.h5
3 files changed, 12 insertions, 7 deletions
diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index 5dfd8f8ff07..cd8b4704ef4 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;
}
diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c
index f914b26cf0c..7b9b1d1b75a 100644
--- a/drivers/xen/gntdev.c
+++ b/drivers/xen/gntdev.c
@@ -123,7 +123,7 @@ static struct grant_map *gntdev_alloc_map(struct gntdev_priv *priv, int count)
NULL == add->pages)
goto err;
- if (alloc_xenballooned_pages(count, add->pages))
+ if (alloc_xenballooned_pages(count, add->pages, false /* lowmem */))
goto err;
for (i = 0; i < count; i++) {
diff --git a/include/xen/balloon.h b/include/xen/balloon.h
index 76f7538bb33..d29c153705b 100644
--- a/include/xen/balloon.h
+++ b/include/xen/balloon.h
@@ -25,8 +25,9 @@ extern struct balloon_stats balloon_stats;
void balloon_set_new_target(unsigned long target);
-int alloc_xenballooned_pages(int nr_pages, struct page** pages);
-void free_xenballooned_pages(int nr_pages, struct page** pages);
+int alloc_xenballooned_pages(int nr_pages, struct page **pages,
+ bool highmem);
+void free_xenballooned_pages(int nr_pages, struct page **pages);
struct sys_device;
#ifdef CONFIG_XEN_SELFBALLOONING