From 971ae8c716c245d8a4cf3e5cb6b3d99540bdda44 Mon Sep 17 00:00:00 2001 From: Konrad Rzeszutek Wilk Date: Wed, 19 Oct 2011 14:09:54 -0400 Subject: [PATCH] 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 [v1: Contextual merge conflict - self-ballooning has been already merged] Signed-off-by: Konrad Rzeszutek Wilk --- drivers/xen/balloon.c | 12 ++++++++---- drivers/xen/gntdev.c | 2 +- include/xen/balloon.h | 5 +++-- 3 files changed, 12 insertions(+), 7 deletions(-) diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c index f54290baa3db..7112722c2f32 100644 --- a/drivers/xen/balloon.c +++ b/drivers/xen/balloon.c @@ -374,20 +374,24 @@ 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 f914b26cf0c2..7b9b1d1b75a5 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 a2b22f01a51d..50e379222af5 100644 --- a/include/xen/balloon.h +++ b/include/xen/balloon.h @@ -21,5 +21,6 @@ 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); -- 2.50.1