linux-kernel - [PATCH] mm: hugetlb: add might

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Date:	Fri, 23 Dec 2011 21:41:08 +0800
From:	Hillf Danton <dhillf@...il.com>
To:	linux-mm@...ck.org
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Michal Hocko <mhocko@...e.cz>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Subject: [PATCH] mm: hugetlb: add might_sleep() for gigantic page

From: Hillf Danton <dhillf@...il.com>
Subject: [PATCH] mm: hugetlb: add might_sleep() for gigantic page

Like the case of huge page, might_sleep() is added for gigantic page, then
both are treated in same way.

Cc: Michal Hocko <mhocko@...e.cz>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Hillf Danton <dhillf@...il.com>
---

--- a/mm/hugetlb.c	Tue Dec 20 21:26:30 2011
+++ b/mm/hugetlb.c	Fri Dec 23 21:19:18 2011
@@ -401,6 +401,7 @@ static void copy_gigantic_page(struct pa
 	struct page *dst_base = dst;
 	struct page *src_base = src;

+	might_sleep();
 	for (i = 0; i < pages_per_huge_page(h); ) {
 		cond_resched();
 		copy_highpage(dst, src);
--
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