[PATCH 30/36] autonuma: bugcheck page_autonuma fields on newly allocated pages

[Andrea Arcangeli]

Debug tweak.

Signed-off-by: Andrea Arcangeli <aarca...@redhat.com>
---
 include/linux/autonuma.h |   19 +++++++++++++++++++
 mm/page_alloc.c          |    3 ++-
 2 files changed, 21 insertions(+), 1 deletions(-)

diff --git a/include/linux/autonuma.h b/include/linux/autonuma.h
index 1d87ecc..8a779e0 100644
--- a/include/linux/autonuma.h
+++ b/include/linux/autonuma.h
@@ -29,6 +29,24 @@ static inline void autonuma_free_page(struct page *page)
        }
 }
 
+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_migrate_nid != -1)) {
+                       ret = 1;
+                       WARN_ON(1);
+               }
+               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)
 
@@ -41,6 +59,7 @@ 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 74b73fa..87a4d5b 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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