Compiler folds the debgging functions into the critical paths.
Avoid that by adding noinline to the functions that check for
problems.
Signed-off-by: Christoph Lameter <[email protected]>
---
mm/slub.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
Index: linux-2.6/mm/slub.c
===================================================================
--- linux-2.6.orig/mm/slub.c 2010-07-29 18:32:26.000000000 -0500
+++ linux-2.6/mm/slub.c 2010-07-29 18:32:33.000000000 -0500
@@ -857,7 +857,7 @@ static void setup_object_debug(struct km
init_tracking(s, object);
}
-static int alloc_debug_processing(struct kmem_cache *s, struct page *page,
+static noinline int alloc_debug_processing(struct kmem_cache *s, struct page *page,
void *object, unsigned long addr)
{
if (!check_slab(s, page))
@@ -897,8 +897,8 @@ bad:
return 0;
}
-static int free_debug_processing(struct kmem_cache *s, struct page *page,
- void *object, unsigned long addr)
+static noinline int free_debug_processing(struct kmem_cache *s,
+ struct page *page, void *object, unsigned long addr)
{
if (!check_slab(s, page))
goto fail;