Merge branch 'writeback-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[pandora-kernel.git] / mm / page_alloc.c

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 6e8ecb6..2b8ba3a 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -318,6 +318,7 @@ static void bad_page(struct page *page)
                current->comm, page_to_pfn(page));
        dump_page(page);
 
+       print_modules();
        dump_stack();
 out:
        /* Leave bad fields for debug, except PageBuddy could make trouble */
@@ -355,8 +356,8 @@ void prep_compound_page(struct page *page, unsigned long order)
        __SetPageHead(page);
        for (i = 1; i < nr_pages; i++) {
                struct page *p = page + i;
-
                __SetPageTail(p);
+               set_page_count(p, 0);
                p->first_page = page;
        }
 }
@@ -1753,7 +1754,6 @@ static DEFINE_RATELIMIT_STATE(nopage_rs,
 
 void warn_alloc_failed(gfp_t gfp_mask, int order, const char *fmt, ...)
 {
-       va_list args;
        unsigned int filter = SHOW_MEM_FILTER_NODES;
 
        if ((gfp_mask & __GFP_NOWARN) || !__ratelimit(&nopage_rs))
@@ -1772,14 +1772,21 @@ void warn_alloc_failed(gfp_t gfp_mask, int order, const char *fmt, ...)
                filter &= ~SHOW_MEM_FILTER_NODES;
 
        if (fmt) {
-               printk(KERN_WARNING);
+               struct va_format vaf;
+               va_list args;
+
                va_start(args, fmt);
-               vprintk(fmt, args);
+
+               vaf.fmt = fmt;
+               vaf.va = &args;
+
+               pr_warn("%pV", &vaf);
+
                va_end(args);
        }
 
-       pr_warning("%s: page allocation failure: order:%d, mode:0x%x\n",
-                  current->comm, order, gfp_mask);
+       pr_warn("%s: page allocation failure: order:%d, mode:0x%x\n",
+               current->comm, order, gfp_mask);
 
        dump_stack();
        if (!should_suppress_show_mem())
@@ -3370,9 +3377,15 @@ static void setup_zone_migrate_reserve(struct zone *zone)
        unsigned long block_migratetype;
        int reserve;
 
-       /* Get the start pfn, end pfn and the number of blocks to reserve */
+       /*
+        * Get the start pfn, end pfn and the number of blocks to reserve
+        * We have to be careful to be aligned to pageblock_nr_pages to
+        * make sure that we always check pfn_valid for the first page in
+        * the block.
+        */
        start_pfn = zone->zone_start_pfn;
        end_pfn = start_pfn + zone->spanned_pages;
+       start_pfn = roundup(start_pfn, pageblock_nr_pages);
        reserve = roundup(min_wmark_pages(zone), pageblock_nr_pages) >>
                                                        pageblock_order;