Re: [PATCH 3/3] reuse __free_pages_exact() in __alloc_pages_exact()
From: Michal Nazarewicz
Date: Tue Apr 12 2011 - 06:30:00 EST
On Tue, 12 Apr 2011 00:03:48 +0200, Dave Hansen <dave@xxxxxxxxxxxxxxxxxx>
wrote:
diff -puN mm/page_alloc.c~reuse-free-exact mm/page_alloc.c
--- linux-2.6.git/mm/page_alloc.c~reuse-free-exact 2011-04-11
15:01:17.701822598 -0700
+++ linux-2.6.git-dave/mm/page_alloc.c 2011-04-11 15:01:17.713822594
-0700
@@ -2338,14 +2338,11 @@ struct page *__alloc_pages_exact(gfp_t g
page = alloc_pages(gfp_mask, order);
if (page) {
- struct page *alloc_end = page + (1 << order);
- struct page *used = page + nr_pages;
+ struct page *unused_start = page + nr_pages;
+ int nr_unused = (1 << order) - nr_pages;
How about unsigned long?
split_page(page, order);
- while (used < alloc_end) {
- __free_page(used);
- used++;
- }
+ __free_pages_exact(unused_start, nr_unused);
}
return page;
--
Best regards, _ _
.o. | Liege of Serenely Enlightened Majesty of o' \,=./ `o
..o | Computer Science, Michal "mina86" Nazarewicz (o o)
ooo +-----<email/xmpp: mnazarewicz@xxxxxxxxxx>-----ooO--(_)--Ooo--
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