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| author | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2011-09-29 11:57:55 +0100 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2011-09-29 09:56:52 -0400 |
| commit | 693394b8c3dcee1a3baa52e30fdc3323d88cd579 (patch) | |
| tree | 5afa5342abce4d79ef9510b2c61efebc16b937b5 | |
| parent | 0f4b49eaf25e661fbe63a5370b7781166b34d616 (diff) | |
| download | linux-693394b8c3dcee1a3baa52e30fdc3323d88cd579.tar.gz linux-693394b8c3dcee1a3baa52e30fdc3323d88cd579.tar.bz2 linux-693394b8c3dcee1a3baa52e30fdc3323d88cd579.zip | |
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.c | 12 | ||||
| -rw-r--r-- | drivers/xen/gntdev.c | 2 | ||||
| -rw-r--r-- | 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 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; } 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 76f7538bb339..d29c153705bc 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 |