Merge commit 'origin/master' into next

[deliverable/linux.git] / mm / page_alloc.c

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 755c99a0ac71afa8e21e2683979e4b493ab1ef6b..7bf22e04531888b9a3b1c18c540023040432913e 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -223,16 +223,39 @@ static inline int bad_range(struct zone *zone, struct page *page)
 
 static void bad_page(struct page *page)
 {
-       printk(KERN_EMERG "Bad page state in process %s  pfn:%05lx\n",
+       static unsigned long resume;
+       static unsigned long nr_shown;
+       static unsigned long nr_unshown;
+
+       /*
+        * Allow a burst of 60 reports, then keep quiet for that minute;
+        * or allow a steady drip of one report per second.
+        */
+       if (nr_shown == 60) {
+               if (time_before(jiffies, resume)) {
+                       nr_unshown++;
+                       goto out;
+               }
+               if (nr_unshown) {
+                       printk(KERN_ALERT
+                             "BUG: Bad page state: %lu messages suppressed\n",
+                               nr_unshown);
+                       nr_unshown = 0;
+               }
+               nr_shown = 0;
+       }
+       if (nr_shown++ == 0)
+               resume = jiffies + 60 * HZ;
+
+       printk(KERN_ALERT "BUG: Bad page state in process %s  pfn:%05lx\n",
                current->comm, page_to_pfn(page));
-       printk(KERN_EMERG
+       printk(KERN_ALERT
                "page:%p flags:%p count:%d mapcount:%d mapping:%p index:%lx\n",
                page, (void *)page->flags, page_count(page),
                page_mapcount(page), page->mapping, page->index);
-       printk(KERN_EMERG "Trying to fix it up, but a reboot is needed\n");
 
        dump_stack();
-
+out:
        /* Leave bad fields for debug, except PageBuddy could make trouble */
        __ClearPageBuddy(page);
        add_taint(TAINT_BAD_PAGE);
@@ -4564,19 +4587,6 @@ void *__init alloc_large_system_hash(const char *tablename,
        return table;
 }
 
-#ifdef CONFIG_OUT_OF_LINE_PFN_TO_PAGE
-struct page *pfn_to_page(unsigned long pfn)
-{
-       return __pfn_to_page(pfn);
-}
-unsigned long page_to_pfn(struct page *page)
-{
-       return __page_to_pfn(page);
-}
-EXPORT_SYMBOL(pfn_to_page);
-EXPORT_SYMBOL(page_to_pfn);
-#endif /* CONFIG_OUT_OF_LINE_PFN_TO_PAGE */
-
 /* Return a pointer to the bitmap storing bits affecting a block of pages */
 static inline unsigned long *get_pageblock_bitmap(struct zone *zone,
                                                        unsigned long pfn)