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SubjectRe: [PATCH 3/3] reuse __free_pages_exact() in __alloc_pages_exact()
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On Tue, 12 Apr 2011 00:03:48 +0200, Dave Hansen <dave@linux.vnet.ibm.com>  
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@google.com>-----ooO--(_)--Ooo--


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