From b7ab795b7bec9997d4fde39f249d52823d36d98d Mon Sep 17 00:00:00 2001 From: Nick Piggin Date: Wed, 22 Mar 2006 00:08:42 -0800 Subject: [PATCH] mm: more CONFIG_DEBUG_VM Put a few more checks under CONFIG_DEBUG_VM Signed-off-by: Nick Piggin Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/rmap.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) (limited to 'mm/rmap.c') diff --git a/mm/rmap.c b/mm/rmap.c index 134aef9d66c..1963e269314 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -56,13 +56,11 @@ #include -//#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, -- cgit v1.2.3