Factor out the gfp to alloc_flags mapping so it can be used in other places.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
---
mm/internal.h | 11 ++++++
mm/page_alloc.c | 98 ++++++++++++++++++++++++++++++++------------------------
2 files changed, 67 insertions(+), 42 deletions(-)
Index: linux-2.6/mm/internal.h
===================================================================
--- linux-2.6.orig/mm/internal.h
+++ linux-2.6/mm/internal.h
@@ -47,4 +47,15 @@ static inline unsigned long page_order(s
VM_BUG_ON(!PageBuddy(page));
return page_private(page);
}
+
+#define ALLOC_HARDER 0x01 /* try to alloc harder */
+#define ALLOC_HIGH 0x02 /* __GFP_HIGH set */
+#define ALLOC_WMARK_MIN 0x04 /* use pages_min watermark */
+#define ALLOC_WMARK_LOW 0x08 /* use pages_low watermark */
+#define ALLOC_WMARK_HIGH 0x10 /* use pages_high watermark */
+#define ALLOC_NO_WATERMARKS 0x20 /* don't check watermarks at all */
+#define ALLOC_CPUSET 0x40 /* check for correct cpuset */
+
+int gfp_to_alloc_flags(gfp_t gfp_mask);
+
#endif
Index: linux-2.6/mm/page_alloc.c
===================================================================
--- linux-2.6.orig/mm/page_alloc.c
+++ linux-2.6/mm/page_alloc.c
@@ -1139,14 +1139,6 @@ failed:
return NULL;
}
-#define ALLOC_NO_WATERMARKS 0x01 /* don't check watermarks at all */
-#define ALLOC_WMARK_MIN 0x02 /* use pages_min watermark */
-#define ALLOC_WMARK_LOW 0x04 /* use pages_low watermark */
-#define ALLOC_WMARK_HIGH 0x08 /* use pages_high watermark */
-#define ALLOC_HARDER 0x10 /* try to alloc harder */
-#define ALLOC_HIGH 0x20 /* __GFP_HIGH set */
-#define ALLOC_CPUSET 0x40 /* check for correct cpuset */
-
#ifdef CONFIG_FAIL_PAGE_ALLOC
static struct fail_page_alloc_attr {
@@ -1535,6 +1527,44 @@ static void set_page_owner(struct page *
#endif /* CONFIG_PAGE_OWNER */
/*
+ * get the deepest reaching allocation flags for the given gfp_mask
+ */
+int gfp_to_alloc_flags(gfp_t gfp_mask)
+{
+ struct t...
