summaryrefslogtreecommitdiffstats
path: root/mm/page_alloc.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--mm/page_alloc.c36
1 files changed, 35 insertions, 1 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 925b0b985f79..cdad3249cf7f 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -53,6 +53,8 @@ unsigned long totalram_pages __read_mostly;
unsigned long totalhigh_pages __read_mostly;
long nr_swap_pages;
+static void fastcall free_hot_cold_page(struct page *page, int cold);
+
/*
* results with 256, 32 in the lowmem_reserve sysctl:
* 1G machine -> (16M dma, 800M-16M normal, 1G-800M high)
@@ -432,6 +434,39 @@ void __free_pages_ok(struct page *page, unsigned int order)
local_irq_restore(flags);
}
+/*
+ * permit the bootmem allocator to evade page validation on high-order frees
+ */
+void fastcall __init __free_pages_bootmem(struct page *page, unsigned int order)
+{
+ if (order == 0) {
+ __ClearPageReserved(page);
+ set_page_count(page, 0);
+
+ free_hot_cold_page(page, 0);
+ } else {
+ LIST_HEAD(list);
+ int loop;
+
+ for (loop = 0; loop < BITS_PER_LONG; loop++) {
+ struct page *p = &page[loop];
+
+ if (loop + 16 < BITS_PER_LONG)
+ prefetchw(p + 16);
+ __ClearPageReserved(p);
+ set_page_count(p, 0);
+ }
+
+ arch_free_page(page, order);
+
+ mod_page_state(pgfree, 1 << order);
+
+ list_add(&page->lru, &list);
+ kernel_map_pages(page, 1 << order, 0);
+ free_pages_bulk(page_zone(page), 1, &list, order);
+ }
+}
+
/*
* The order of subdivision here is critical for the IO subsystem.
@@ -671,7 +706,6 @@ static void zone_statistics(struct zonelist *zonelist, struct zone *z)
/*
* Free a 0-order page
*/
-static void FASTCALL(free_hot_cold_page(struct page *page, int cold));
static void fastcall free_hot_cold_page(struct page *page, int cold)
{
struct zone *zone = page_zone(page);