[PATCH 30/33] autonuma: bugcheck page_autonuma fields on newly allocated pages

[Andrea Arcangeli <aarcange@redhat.com>]

Debug tweak.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
---
 include/linux/autonuma.h |   15 +++++++++++++++
 mm/page_alloc.c          |    3 ++-
 2 files changed, 17 insertions(+), 1 deletions(-)

diff --git a/include/linux/autonuma.h b/include/linux/autonuma.h
index 274c616..9cd94cc 100644
--- a/include/linux/autonuma.h
+++ b/include/linux/autonuma.h
@@ -18,6 +18,20 @@ static inline void autonuma_free_page(struct page *page)
 		lookup_page_autonuma(page)->autonuma_last_nid = -1;
 }
 
+static inline int autonuma_check_new_page(struct page *page)
+{
+	struct page_autonuma *page_autonuma;
+	int ret = 0;
+	if (autonuma_possible()) {
+		page_autonuma = lookup_page_autonuma(page);
+		if (unlikely(page_autonuma->autonuma_last_nid != -1)) {
+			ret = 1;
+			WARN_ON(1);
+		}
+	}
+	return ret;
+}
+
 #define autonuma_printk(format, args...) \
 	if (autonuma_debug()) printk(format, ##args)
 
@@ -29,6 +43,7 @@ static inline void autonuma_migrate_split_huge_page(struct page *page,
 						    struct page *page_tail) {}
 static inline void autonuma_setup_new_exec(struct task_struct *p) {}
 static inline void autonuma_free_page(struct page *page) {}
+static inline int autonuma_check_new_page(struct page *page) { return 0; }
 
 #endif /* CONFIG_AUTONUMA */
 
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 8e6493a..ecb2f8d 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -833,7 +833,8 @@ static inline int check_new_page(struct page *page)
 		(page->mapping != NULL)  |
 		(__page_count(page) != 0)  |
 		(page->flags & PAGE_FLAGS_CHECK_AT_PREP) |
-		(mem_cgroup_bad_page_check(page)))) {
+		(mem_cgroup_bad_page_check(page)) |
+		autonuma_check_new_page(page))) {
 		bad_page(page);
 		return 1;
 	}

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