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Subject[PATCH 39/40] autonuma: bugcheck page_autonuma fields on newly allocated pages
Date
Debug tweak.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
---
include/linux/autonuma.h | 11 +++++++++++
mm/page_alloc.c | 1 +
2 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/include/linux/autonuma.h b/include/linux/autonuma.h
index 67af86a..05bd8c1 100644
--- a/include/linux/autonuma.h
+++ b/include/linux/autonuma.h
@@ -29,6 +29,16 @@ static inline void autonuma_free_page(struct page *page)
}
}

+static inline void autonuma_check_new_page(struct page *page)
+{
+ struct page_autonuma *page_autonuma;
+ if (!autonuma_impossible()) {
+ page_autonuma = lookup_page_autonuma(page);
+ BUG_ON(page_autonuma->autonuma_migrate_nid != -1);
+ BUG_ON(page_autonuma->autonuma_last_nid != -1);
+ }
+}
+
#define autonuma_printk(format, args...) \
if (autonuma_debug()) printk(format, ##args)

@@ -41,6 +51,7 @@ 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 void autonuma_check_new_page(struct page *page) {}

#endif /* CONFIG_AUTONUMA */

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 2d53a1f..5943ed2 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -833,6 +833,7 @@ static inline int check_new_page(struct page *page)
bad_page(page);
return 1;
}
+ autonuma_check_new_page(page);
return 0;
}


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