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authorNick Piggin <npiggin@suse.de>2006-03-22 11:08:42 +0300
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-22 18:54:02 +0300
commitb7ab795b7bec9997d4fde39f249d52823d36d98d (patch)
tree8b8825a0718ec38b5b0840fe06efa9a92a0e30c7 /mm/rmap.c
parent6626c5d53bc45c59798628677ba5606f02e371f3 (diff)
downloadlinux-b7ab795b7bec9997d4fde39f249d52823d36d98d.tar.xz
[PATCH] mm: more CONFIG_DEBUG_VM
Put a few more checks under CONFIG_DEBUG_VM Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/rmap.c')
-rw-r--r--mm/rmap.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/mm/rmap.c b/mm/rmap.c
index 134aef9d66c5..1963e269314d 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -56,13 +56,11 @@
#include <asm/tlbflush.h>
-//#define RMAP_DEBUG /* can be enabled only for debugging */
-
struct kmem_cache *anon_vma_cachep;
static inline void validate_anon_vma(struct vm_area_struct *find_vma)
{
-#ifdef RMAP_DEBUG
+#ifdef CONFIG_DEBUG_VM
struct anon_vma *anon_vma = find_vma->anon_vma;
struct vm_area_struct *vma;
unsigned int mapcount = 0;
@@ -551,13 +549,14 @@ void page_add_file_rmap(struct page *page)
void page_remove_rmap(struct page *page)
{
if (atomic_add_negative(-1, &page->_mapcount)) {
- if (page_mapcount(page) < 0) {
+#ifdef CONFIG_DEBUG_VM
+ if (unlikely(page_mapcount(page) < 0)) {
printk (KERN_EMERG "Eeek! page_mapcount(page) went negative! (%d)\n", page_mapcount(page));
printk (KERN_EMERG " page->flags = %lx\n", page->flags);
printk (KERN_EMERG " page->count = %x\n", page_count(page));
printk (KERN_EMERG " page->mapping = %p\n", page->mapping);
}
-
+#endif
BUG_ON(page_mapcount(page) < 0);
/*
* It would be tidy to reset the PageAnon mapping here,