From 748f1a2ed7a68e15b28a1da3559afbebba121772 Mon Sep 17 00:00:00 2001 From: KOSAKI Motohiro Date: Fri, 14 Nov 2008 16:25:01 +0900 Subject: [PATCH] mm: remove unevictable's show_page_path Hugh Dickins reported show_page_path() is buggy and unsafe because - lack dput() against d_find_alias() - don't concern vma->vm_mm->owner == NULL - lack lock_page() it was only for debugging, so rather than trying to fix it, just remove it now. Reported-by: Hugh Dickins Signed-off-by: Hugh Dickins Signed-off-by: KOSAKI Motohiro CC: Lee Schermerhorn CC: Rik van Riel Signed-off-by: Linus Torvalds --- mm/vmscan.c | 35 ----------------------------------- 1 file changed, 35 deletions(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index 3b5860294bb6..c141b3e78071 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -2368,39 +2368,6 @@ int page_evictable(struct page *page, struct vm_area_struct *vma) return 1; } -static void show_page_path(struct page *page) -{ - char buf[256]; - if (page_is_file_cache(page)) { - struct address_space *mapping = page->mapping; - struct dentry *dentry; - pgoff_t pgoff = page->index << (PAGE_CACHE_SHIFT - PAGE_SHIFT); - - spin_lock(&mapping->i_mmap_lock); - dentry = d_find_alias(mapping->host); - printk(KERN_INFO "rescued: %s %lu\n", - dentry_path(dentry, buf, 256), pgoff); - spin_unlock(&mapping->i_mmap_lock); - } else { -#if defined(CONFIG_MM_OWNER) && defined(CONFIG_MMU) - struct anon_vma *anon_vma; - struct vm_area_struct *vma; - - anon_vma = page_lock_anon_vma(page); - if (!anon_vma) - return; - - list_for_each_entry(vma, &anon_vma->head, anon_vma_node) { - printk(KERN_INFO "rescued: anon %s\n", - vma->vm_mm->owner->comm); - break; - } - page_unlock_anon_vma(anon_vma); -#endif - } -} - - /** * check_move_unevictable_page - check page for evictability and move to appropriate zone lru list * @page: page to check evictability and move to appropriate lru list @@ -2421,8 +2388,6 @@ static void check_move_unevictable_page(struct page *page, struct zone *zone) if (page_evictable(page, NULL)) { enum lru_list l = LRU_INACTIVE_ANON + page_is_file_cache(page); - show_page_path(page); - __dec_zone_state(zone, NR_UNEVICTABLE); list_move(&page->lru, &zone->lru[l].list); __inc_zone_state(zone, NR_INACTIVE_ANON + l);