diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 802b082e216d4780c4f2c49db5770087d6ad7cac..f80f5e2aec87592168ba6724e122357a2240a9d0 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -54,6 +54,11 @@ config ARCH_HAS_ILOG2_U64
bool
default n
+config HUGETLB_PAGE_SIZE_VARIABLE
+ bool
+ depends on HUGETLB_PAGE
+ default y
+
config GENERIC_FIND_NEXT_BIT
bool
default y
diff --git a/arch/ia64/mm/hugetlbpage.c b/arch/ia64/mm/hugetlbpage.c
index a9ff685aea25acfbd6547d62d3845fb8016c96a6..d3ce8f3bcaa694070c8ccefb2ef4f03fac2fe6d0 100644
--- a/arch/ia64/mm/hugetlbpage.c
+++ b/arch/ia64/mm/hugetlbpage.c
@@ -194,6 +194,6 @@ static int __init hugetlb_setup_sz(char *str)
* override here with new page shift.
*/
ia64_set_rr(HPAGE_REGION_BASE, hpage_shift << 2);
- return 1;
+ return 0;
}
-__setup("hugepagesz=", hugetlb_setup_sz);
+early_param("hugepagesz", hugetlb_setup_sz);
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index fef08c6cf75e6abace696d684474fd23ca6ebab0..87a4045580f2789a636ad7782befa14b3110cca8 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -235,7 +235,7 @@ struct zone {
#ifndef CONFIG_SPARSEMEM
/*
- * Flags for a MAX_ORDER_NR_PAGES block. See pageblock-flags.h.
+ * Flags for a pageblock_nr_pages block. See pageblock-flags.h.
* In SPARSEMEM, this map is stored in struct mem_section
*/
unsigned long *pageblock_flags;
@@ -740,7 +740,7 @@ extern struct zone *next_zone(struct zone *zone);
#define PAGE_SECTION_MASK (~(PAGES_PER_SECTION-1))
#define SECTION_BLOCKFLAGS_BITS \
- ((1 << (PFN_SECTION_SHIFT - (MAX_ORDER-1))) * NR_PAGEBLOCK_BITS)
+ ((1UL << (PFN_SECTION_SHIFT - pageblock_order)) * NR_PAGEBLOCK_BITS)
#if (MAX_ORDER - 1 + PAGE_SHIFT) > SECTION_SIZE_BITS
#error Allocator MAX_ORDER exceeds SECTION_SIZE
diff --git a/include/linux/pageblock-flags.h b/include/linux/pageblock-flags.h
index 5456da6b4ade76b7b8887b2bb009e2fe9c770177..9ea130829fb4b9b1f24cf2fb47e32ed13e51a57f 100644
--- a/include/linux/pageblock-flags.h
+++ b/include/linux/pageblock-flags.h
@@ -1,6 +1,6 @@
/*
* Macros for manipulating and testing flags related to a
- * MAX_ORDER_NR_PAGES block of pages.
+ * pageblock_nr_pages number of pages.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -35,6 +35,29 @@ enum pageblock_bits {
NR_PAGEBLOCK_BITS
};
+#ifdef CONFIG_HUGETLB_PAGE
+
+#ifdef CONFIG_HUGETLB_PAGE_SIZE_VARIABLE
+
+/* Huge page sizes are variable */
+extern int pageblock_order;
+
+#else /* CONFIG_HUGETLB_PAGE_SIZE_VARIABLE */
+
+/* Huge pages are a constant size */
+#define pageblock_order HUGETLB_PAGE_ORDER
+
+#endif /* CONFIG_HUGETLB_PAGE_SIZE_VARIABLE */
+
+#else /* CONFIG_HUGETLB_PAGE */
+
+/* If huge pages are not used, group by MAX_ORDER_NR_PAGES */
+#define pageblock_order (MAX_ORDER-1)
+
+#endif /* CONFIG_HUGETLB_PAGE */
+
+#define pageblock_nr_pages (1UL << pageblock_order)
+
/* Forward declaration */
struct page;
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 942498fba942809970a434541d3f071e10477c0e..b9bc7369c48dddb88475b1783db6a4a5a33f7458 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -67,6 +67,10 @@ unsigned long totalreserve_pages __read_mostly;
long nr_swap_pages;
int percpu_pagelist_fraction;
+#ifdef CONFIG_HUGETLB_PAGE_SIZE_VARIABLE
+int pageblock_order __read_mostly;
+#endif
+
static void __free_pages_ok(struct page *page, unsigned int order);
/*
@@ -709,7 +713,7 @@ static int fallbacks[MIGRATE_TYPES][MIGRATE_TYPES-1] = {
/*
* Move the free pages in a range to the free lists of the requested type.
- * Note that start_page and end_pages are not aligned in a MAX_ORDER_NR_PAGES
+ * Note that start_page and end_pages are not aligned on a pageblock
* boundary. If alignment is required, use move_freepages_block()
*/
int move_freepages(struct zone *zone,
@@ -759,10 +763,10 @@ int move_freepages_block(struct zone *zone, struct page *page, int migratetype)
struct page *start_page, *end_page;
start_pfn = page_to_pfn(page);
- start_pfn = start_pfn & ~(MAX_ORDER_NR_PAGES-1);
+ start_pfn = start_pfn & ~(pageblock_nr_pages-1);
start_page = pfn_to_page(start_pfn);
- end_page = start_page + MAX_ORDER_NR_PAGES - 1;
- end_pfn = start_pfn + MAX_ORDER_NR_PAGES - 1;
+ end_page = start_page + pageblock_nr_pages - 1;
+ end_pfn = start_pfn + pageblock_nr_pages - 1;
/* Do not cross zone boundaries */
if (start_pfn < zone->zone_start_pfn)
@@ -826,14 +830,14 @@ static struct page *__rmqueue_fallback(struct zone *zone, int order,
* back for a reclaimable kernel allocation, be more
* agressive about taking ownership of free pages
*/
- if (unlikely(current_order >= MAX_ORDER / 2) ||
+ if (unlikely(current_order >= (pageblock_order >> 1)) ||
start_migratetype == MIGRATE_RECLAIMABLE) {
unsigned long pages;
pages = move_freepages_block(zone, page,
start_migratetype);
/* Claim the whole block if over half of it is free */
- if (pages >= (1 << (MAX_ORDER-2)))
+ if (pages >= (1 << (pageblock_order-1)))
set_pageblock_migratetype(page,
start_migratetype);
@@ -846,7 +850,7 @@ static struct page *__rmqueue_fallback(struct zone *zone, int order,
__mod_zone_page_state(zone, NR_FREE_PAGES,
-(1UL << order));
- if (current_order == MAX_ORDER - 1)
+ if (current_order == pageblock_order)
set_pageblock_migratetype(page,
start_migratetype);
@@ -2385,7 +2389,7 @@ void build_all_zonelists(void)
* made on memory-hotadd so a system can start with mobility
* disabled and enable it later
*/
- if (vm_total_pages < (MAX_ORDER_NR_PAGES * MIGRATE_TYPES))
+ if (vm_total_pages < (pageblock_nr_pages * MIGRATE_TYPES))
page_group_by_mobility_disabled = 1;
else
page_group_by_mobility_disabled = 0;
@@ -2470,7 +2474,7 @@ static inline unsigned long wait_table_bits(unsigned long size)
#define LONG_ALIGN(x) (((x)+(sizeof(long))-1)&~((sizeof(long))-1))
/*
- * Mark a number of MAX_ORDER_NR_PAGES blocks as MIGRATE_RESERVE. The number
+ * Mark a number of pageblocks as MIGRATE_RESERVE. The number
* of blocks reserved is based on zone->pages_min. The memory within the
* reserve will tend to store contiguous free pages. Setting min_free_kbytes
* higher will lead to a bigger reserve which will get freed as contiguous
@@ -2485,9 +2489,10 @@ static void setup_zone_migrate_reserve(struct zone *zone)
/* Get the start pfn, end pfn and the number of blocks to reserve */
start_pfn = zone->zone_start_pfn;
end_pfn = start_pfn + zone->spanned_pages;
- reserve = roundup(zone->pages_min, MAX_ORDER_NR_PAGES) >> (MAX_ORDER-1);
+ reserve = roundup(zone->pages_min, pageblock_nr_pages) >>
+ pageblock_order;
- for (pfn = start_pfn; pfn < end_pfn; pfn += MAX_ORDER_NR_PAGES) {
+ for (pfn = start_pfn; pfn < end_pfn; pfn += pageblock_nr_pages) {
if (!pfn_valid(pfn))
continue;
page = pfn_to_page(pfn);
@@ -2562,7 +2567,7 @@ void __meminit memmap_init_zone(unsigned long size, int nid, unsigned long zone,
* the start are marked MIGRATE_RESERVE by
* setup_zone_migrate_reserve()
*/
- if ((pfn & (MAX_ORDER_NR_PAGES-1)))
+ if ((pfn & (pageblock_nr_pages-1)))
set_pageblock_migratetype(page, MIGRATE_MOVABLE);
INIT_LIST_HEAD(&page->lru);
@@ -3266,8 +3271,8 @@ static void __meminit calculate_node_totalpages(struct pglist_data *pgdat,
#ifndef CONFIG_SPARSEMEM
/*
* Calculate the size of the zone->blockflags rounded to an unsigned long
- * Start by making sure zonesize is a multiple of MAX_ORDER-1 by rounding up
- * Then figure 1 NR_PAGEBLOCK_BITS worth of bits per MAX_ORDER-1, finally
+ * Start by making sure zonesize is a multiple of pageblock_order by rounding
+ * up. Then use 1 NR_PAGEBLOCK_BITS worth of bits per pageblock, finally
* round what is now in bits to nearest long in bits, then return it in
* bytes.
*/
@@ -3275,8 +3280,8 @@ static unsigned long __init usemap_size(unsigned long zonesize)
{
unsigned long usemapsize;
- usemapsize = roundup(zonesize, MAX_ORDER_NR_PAGES);
- usemapsize = usemapsize >> (MAX_ORDER-1);
+ usemapsize = roundup(zonesize, pageblock_nr_pages);
+ usemapsize = usemapsize >> pageblock_order;
usemapsize *= NR_PAGEBLOCK_BITS;
usemapsize = roundup(usemapsize, 8 * sizeof(unsigned long));
@@ -3298,6 +3303,27 @@ static void inline setup_usemap(struct pglist_data *pgdat,
struct zone *zone, unsigned long zonesize) {}
#endif /* CONFIG_SPARSEMEM */
+#ifdef CONFIG_HUGETLB_PAGE_SIZE_VARIABLE
+/* Initialise the number of pages represented by NR_PAGEBLOCK_BITS */
+static inline void __init set_pageblock_order(unsigned int order)
+{
+ /* Check that pageblock_nr_pages has not already been setup */
+ if (pageblock_order)
+ return;
+
+ /*
+ * Assume the largest contiguous order of interest is a huge page.
+ * This value may be variable depending on boot parameters on IA64
+ */
+ pageblock_order = order;
+}
+#else /* CONFIG_HUGETLB_PAGE_SIZE_VARIABLE */
+
+/* Defined this way to avoid accidently referencing HUGETLB_PAGE_ORDER */
+#define set_pageblock_order(x) do {} while (0)
+
+#endif /* CONFIG_HUGETLB_PAGE_SIZE_VARIABLE */
+
/*
* Set up the zone data structures:
* - mark all pages reserved
@@ -3378,6 +3404,7 @@ static void __meminit free_area_init_core(struct pglist_data *pgdat,
if (!size)
continue;
+ set_pageblock_order(HUGETLB_PAGE_ORDER);
setup_usemap(pgdat, zone, size);
ret = init_currently_empty_zone(zone, zone_start_pfn,
size, MEMMAP_EARLY);
@@ -4375,15 +4402,15 @@ static inline int pfn_to_bitidx(struct zone *zone, unsigned long pfn)
{
#ifdef CONFIG_SPARSEMEM
pfn &= (PAGES_PER_SECTION-1);
- return (pfn >> (MAX_ORDER-1)) * NR_PAGEBLOCK_BITS;
+ return (pfn >> pageblock_order) * NR_PAGEBLOCK_BITS;
#else
pfn = pfn - zone->zone_start_pfn;
- return (pfn >> (MAX_ORDER-1)) * NR_PAGEBLOCK_BITS;
+ return (pfn >> pageblock_order) * NR_PAGEBLOCK_BITS;
#endif /* CONFIG_SPARSEMEM */
}
/**
- * get_pageblock_flags_group - Return the requested group of flags for the MAX_ORDER_NR_PAGES block of pages
+ * get_pageblock_flags_group - Return the requested group of flags for the pageblock_nr_pages block of pages
* @page: The page within the block of interest
* @start_bitidx: The first bit of interest to retrieve
* @end_bitidx: The last bit of interest
@@ -4411,7 +4438,7 @@ unsigned long get_pageblock_flags_group(struct page *page,
}
/**
- * set_pageblock_flags_group - Set the requested group of flags for a MAX_ORDER_NR_PAGES block of pages
+ * set_pageblock_flags_group - Set the requested group of flags for a pageblock_nr_pages block of pages
* @page: The page within the block of interest
* @start_bitidx: The first bit of interest
* @end_bitidx: The last bit of interest