1 files changed, 201 insertions, 167 deletions

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 32dff4290c66..0d8153e25f09 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -22,18 +22,12 @@
 #include "internal.h"
 
 const unsigned long hugetlb_zero = 0, hugetlb_infinity = ~0UL;
-static unsigned long nr_huge_pages, free_huge_pages, resv_huge_pages;
-static unsigned long surplus_huge_pages;
-static unsigned long nr_overcommit_huge_pages;
 unsigned long max_huge_pages;
 unsigned long sysctl_overcommit_huge_pages;
-static struct list_head hugepage_freelists[MAX_NUMNODES];
-static unsigned int nr_huge_pages_node[MAX_NUMNODES];
-static unsigned int free_huge_pages_node[MAX_NUMNODES];
-static unsigned int surplus_huge_pages_node[MAX_NUMNODES];
 static gfp_t htlb_alloc_mask = GFP_HIGHUSER;
 unsigned long hugepages_treat_as_movable;
-static int hugetlb_next_nid;
+
+struct hstate default_hstate;
 
 /*
  * Protects updates to hugepage_freelists, nr_huge_pages, and free_huge_pages
@@ -203,11 +197,11 @@ static long region_count(struct list_head *head, long f, long t)
  * Convert the address within this vma to the page offset within
  * the mapping, in pagecache page units; huge pages here.
  */
-static pgoff_t vma_hugecache_offset(struct vm_area_struct *vma,
-                                        unsigned long address)
+static pgoff_t vma_hugecache_offset(struct hstate *h,
+                        struct vm_area_struct *vma, unsigned long address)
 {
-        return ((address - vma->vm_start) >> HPAGE_SHIFT) +
-                        (vma->vm_pgoff >> (HPAGE_SHIFT - PAGE_SHIFT));
+        return ((address - vma->vm_start) >> huge_page_shift(h)) +
+                        (vma->vm_pgoff >> huge_page_order(h));
 }
 
 /*
@@ -309,20 +303,21 @@ static int is_vma_resv_set(struct vm_area_struct *vma, unsigned long flag)
 }
 
 /* Decrement the reserved pages in the hugepage pool by one */
-static void decrement_hugepage_resv_vma(struct vm_area_struct *vma)
+static void decrement_hugepage_resv_vma(struct hstate *h,
+                        struct vm_area_struct *vma)
 {
         if (vma->vm_flags & VM_NORESERVE)
                 return;
 
         if (vma->vm_flags & VM_SHARED) {
                 /* Shared mappings always use reserves */
-                resv_huge_pages--;
+                h->resv_huge_pages--;
         } else if (is_vma_resv_set(vma, HPAGE_RESV_OWNER)) {
                 /*
                  * Only the process that called mmap() has reserves for
                  * private mappings.
                  */
-                resv_huge_pages--;
+                h->resv_huge_pages--;
         }
 }
 
@@ -344,12 +339,13 @@ static int vma_has_private_reserves(struct vm_area_struct *vma)
         return 1;
 }
 
-static void clear_huge_page(struct page *page, unsigned long addr)
+static void clear_huge_page(struct page *page,
+                        unsigned long addr, unsigned long sz)
 {
         int i;
 
         might_sleep();
-        for (i = 0; i < (HPAGE_SIZE/PAGE_SIZE); i++) {
+        for (i = 0; i < sz/PAGE_SIZE; i++) {
                 cond_resched();
                 clear_user_highpage(page + i, addr + i * PAGE_SIZE);
         }
@@ -359,41 +355,43 @@ static void copy_huge_page(struct page *dst, struct page *src,
                            unsigned long addr, struct vm_area_struct *vma)
 {
         int i;
+        struct hstate *h = hstate_vma(vma);
 
         might_sleep();
-        for (i = 0; i < HPAGE_SIZE/PAGE_SIZE; i++) {
+        for (i = 0; i < pages_per_huge_page(h); i++) {
                 cond_resched();
                 copy_user_highpage(dst + i, src + i, addr + i*PAGE_SIZE, vma);
         }
 }
 
-static void enqueue_huge_page(struct page *page)
+static void enqueue_huge_page(struct hstate *h, struct page *page)
 {
         int nid = page_to_nid(page);
-        list_add(&page->lru, &hugepage_freelists[nid]);
-        free_huge_pages++;
-        free_huge_pages_node[nid]++;
+        list_add(&page->lru, &h->hugepage_freelists[nid]);
+        h->free_huge_pages++;
+        h->free_huge_pages_node[nid]++;
 }
 
-static struct page *dequeue_huge_page(void)
+static struct page *dequeue_huge_page(struct hstate *h)
 {
         int nid;
         struct page *page = NULL;
 
         for (nid = 0; nid < MAX_NUMNODES; ++nid) {
-                if (!list_empty(&hugepage_freelists[nid])) {
-                        page = list_entry(hugepage_freelists[nid].next,
+                if (!list_empty(&h->hugepage_freelists[nid])) {
+                        page = list_entry(h->hugepage_freelists[nid].next,
                                           struct page, lru);
                         list_del(&page->lru);
-                        free_huge_pages--;
-                        free_huge_pages_node[nid]--;
+                        h->free_huge_pages--;
+                        h->free_huge_pages_node[nid]--;
                         break;
                 }
         }
         return page;
 }
 
-static struct page *dequeue_huge_page_vma(struct vm_area_struct *vma,
+static struct page *dequeue_huge_page_vma(struct hstate *h,
+                                struct vm_area_struct *vma,
                                 unsigned long address, int avoid_reserve)
 {
         int nid;
@@ -411,26 +409,26 @@ static struct page *dequeue_huge_page_vma(struct vm_area_struct *vma,
          * not "stolen". The child may still get SIGKILLed
          */
         if (!vma_has_private_reserves(vma) &&
-                        free_huge_pages - resv_huge_pages == 0)
+                        h->free_huge_pages - h->resv_huge_pages == 0)
                 return NULL;
 
         /* If reserves cannot be used, ensure enough pages are in the pool */
-        if (avoid_reserve && free_huge_pages - resv_huge_pages == 0)
+        if (avoid_reserve && h->free_huge_pages - h->resv_huge_pages == 0)
                 return NULL;
 
         for_each_zone_zonelist_nodemask(zone, z, zonelist,
                                                 MAX_NR_ZONES - 1, nodemask) {
                 nid = zone_to_nid(zone);
                 if (cpuset_zone_allowed_softwall(zone, htlb_alloc_mask) &&
-                    !list_empty(&hugepage_freelists[nid])) {
-                        page = list_entry(hugepage_freelists[nid].next,
+                    !list_empty(&h->hugepage_freelists[nid])) {
+                        page = list_entry(h->hugepage_freelists[nid].next,
                                           struct page, lru);
                         list_del(&page->lru);
-                        free_huge_pages--;
-                        free_huge_pages_node[nid]--;
+                        h->free_huge_pages--;
+                        h->free_huge_pages_node[nid]--;
 
                         if (!avoid_reserve)
-                                decrement_hugepage_resv_vma(vma);
+                                decrement_hugepage_resv_vma(h, vma);
 
                         break;
                 }
@@ -439,12 +437,13 @@ static struct page *dequeue_huge_page_vma(struct vm_area_struct *vma,
         return page;
 }
 
-static void update_and_free_page(struct page *page)
+static void update_and_free_page(struct hstate *h, struct page *page)
 {
         int i;
-        nr_huge_pages--;
-        nr_huge_pages_node[page_to_nid(page)]--;
-        for (i = 0; i < (HPAGE_SIZE / PAGE_SIZE); i++) {
+
+        h->nr_huge_pages--;
+        h->nr_huge_pages_node[page_to_nid(page)]--;
+        for (i = 0; i < pages_per_huge_page(h); i++) {
                 page[i].flags &= ~(1 << PG_locked | 1 << PG_error | 1 << PG_referenced |
                                 1 << PG_dirty | 1 << PG_active | 1 << PG_reserved |
                                 1 << PG_private | 1<< PG_writeback);
@@ -452,11 +451,16 @@ static void update_and_free_page(struct page *page)
         set_compound_page_dtor(page, NULL);
         set_page_refcounted(page);
         arch_release_hugepage(page);
-        __free_pages(page, HUGETLB_PAGE_ORDER);
+        __free_pages(page, huge_page_order(h));
 }
 
 static void free_huge_page(struct page *page)
 {
+        /*
+         * Can't pass hstate in here because it is called from the
+         * compound page destructor.
+         */
+        struct hstate *h = &default_hstate;
         int nid = page_to_nid(page);
         struct address_space *mapping;
 
@@ -466,12 +470,12 @@ static void free_huge_page(struct page *page)
         INIT_LIST_HEAD(&page->lru);
 
         spin_lock(&hugetlb_lock);
-        if (surplus_huge_pages_node[nid]) {
-                update_and_free_page(page);
-                surplus_huge_pages--;
-                surplus_huge_pages_node[nid]--;
+        if (h->surplus_huge_pages_node[nid]) {
+                update_and_free_page(h, page);
+                h->surplus_huge_pages--;
+                h->surplus_huge_pages_node[nid]--;
         } else {
-                enqueue_huge_page(page);
+                enqueue_huge_page(h, page);
         }
         spin_unlock(&hugetlb_lock);
         if (mapping)
@@ -483,7 +487,7 @@ static void free_huge_page(struct page *page)
  * balanced by operating on them in a round-robin fashion.
  * Returns 1 if an adjustment was made.
  */
-static int adjust_pool_surplus(int delta)
+static int adjust_pool_surplus(struct hstate *h, int delta)
 {
         static int prev_nid;
         int nid = prev_nid;
@@ -496,15 +500,15 @@ static int adjust_pool_surplus(int delta)
                         nid = first_node(node_online_map);
 
                 /* To shrink on this node, there must be a surplus page */
-                if (delta < 0 && !surplus_huge_pages_node[nid])
+                if (delta < 0 && !h->surplus_huge_pages_node[nid])
                         continue;
                 /* Surplus cannot exceed the total number of pages */
-                if (delta > 0 && surplus_huge_pages_node[nid] >=
-                                                nr_huge_pages_node[nid])
+                if (delta > 0 && h->surplus_huge_pages_node[nid] >=
+                                                h->nr_huge_pages_node[nid])
                         continue;
 
-                surplus_huge_pages += delta;
-                surplus_huge_pages_node[nid] += delta;
+                h->surplus_huge_pages += delta;
+                h->surplus_huge_pages_node[nid] += delta;
                 ret = 1;
                 break;
         } while (nid != prev_nid);
@@ -513,46 +517,46 @@ static int adjust_pool_surplus(int delta)
         return ret;
 }
 
-static void prep_new_huge_page(struct page *page, int nid)
+static void prep_new_huge_page(struct hstate *h, struct page *page, int nid)
 {
         set_compound_page_dtor(page, free_huge_page);
         spin_lock(&hugetlb_lock);
-        nr_huge_pages++;
-        nr_huge_pages_node[nid]++;
+        h->nr_huge_pages++;
+        h->nr_huge_pages_node[nid]++;
         spin_unlock(&hugetlb_lock);
         put_page(page); /* free it into the hugepage allocator */
 }
 
-static struct page *alloc_fresh_huge_page_node(int nid)
+static struct page *alloc_fresh_huge_page_node(struct hstate *h, int nid)
 {
         struct page *page;
 
         page = alloc_pages_node(nid,
                 htlb_alloc_mask|__GFP_COMP|__GFP_THISNODE|
                                                 __GFP_REPEAT|__GFP_NOWARN,
-                HUGETLB_PAGE_ORDER);
+                huge_page_order(h));
         if (page) {
                 if (arch_prepare_hugepage(page)) {
                         __free_pages(page, HUGETLB_PAGE_ORDER);
                         return NULL;
                 }
-                prep_new_huge_page(page, nid);
+                prep_new_huge_page(h, page, nid);
         }
 
         return page;
 }
 
-static int alloc_fresh_huge_page(void)
+static int alloc_fresh_huge_page(struct hstate *h)
 {
         struct page *page;
         int start_nid;
         int next_nid;
         int ret = 0;
 
-        start_nid = hugetlb_next_nid;
+        start_nid = h->hugetlb_next_nid;
 
         do {
-                page = alloc_fresh_huge_page_node(hugetlb_next_nid);
+                page = alloc_fresh_huge_page_node(h, h->hugetlb_next_nid);
                 if (page)
                         ret = 1;
                 /*
@@ -566,11 +570,11 @@ static int alloc_fresh_huge_page(void)
                  * if we just successfully allocated a hugepage so that
                  * the next caller gets hugepages on the next node.
                  */
-                next_nid = next_node(hugetlb_next_nid, node_online_map);
+                next_nid = next_node(h->hugetlb_next_nid, node_online_map);
                 if (next_nid == MAX_NUMNODES)
                         next_nid = first_node(node_online_map);
-                hugetlb_next_nid = next_nid;
-        } while (!page && hugetlb_next_nid != start_nid);
+                h->hugetlb_next_nid = next_nid;
+        } while (!page && h->hugetlb_next_nid != start_nid);
 
         if (ret)
                 count_vm_event(HTLB_BUDDY_PGALLOC);
@@ -580,8 +584,8 @@ static int alloc_fresh_huge_page(void)
         return ret;
 }
 
-static struct page *alloc_buddy_huge_page(struct vm_area_struct *vma,
-                                                unsigned long address)
+static struct page *alloc_buddy_huge_page(struct hstate *h,
+                        struct vm_area_struct *vma, unsigned long address)
 {
         struct page *page;
         unsigned int nid;
@@ -610,18 +614,18 @@ static struct page *alloc_buddy_huge_page(struct vm_area_struct *vma,
          * per-node value is checked there.
          */
         spin_lock(&hugetlb_lock);
-        if (surplus_huge_pages >= nr_overcommit_huge_pages) {
+        if (h->surplus_huge_pages >= h->nr_overcommit_huge_pages) {
                 spin_unlock(&hugetlb_lock);
                 return NULL;
         } else {
-                nr_huge_pages++;
-                surplus_huge_pages++;
+                h->nr_huge_pages++;
+                h->surplus_huge_pages++;
         }
         spin_unlock(&hugetlb_lock);
 
         page = alloc_pages(htlb_alloc_mask|__GFP_COMP|
                                         __GFP_REPEAT|__GFP_NOWARN,
-                                        HUGETLB_PAGE_ORDER);
+                                        huge_page_order(h));
 
         spin_lock(&hugetlb_lock);
         if (page) {
@@ -636,12 +640,12 @@ static struct page *alloc_buddy_huge_page(struct vm_area_struct *vma,
                 /*
                  * We incremented the global counters already
                  */
-                nr_huge_pages_node[nid]++;
-                surplus_huge_pages_node[nid]++;
+                h->nr_huge_pages_node[nid]++;
+                h->surplus_huge_pages_node[nid]++;
                 __count_vm_event(HTLB_BUDDY_PGALLOC);
         } else {
-                nr_huge_pages--;
-                surplus_huge_pages--;
+                h->nr_huge_pages--;
+                h->surplus_huge_pages--;
                 __count_vm_event(HTLB_BUDDY_PGALLOC_FAIL);
         }
         spin_unlock(&hugetlb_lock);
@@ -653,16 +657,16 @@ static struct page *alloc_buddy_huge_page(struct vm_area_struct *vma,
  * Increase the hugetlb pool such that it can accomodate a reservation
  * of size 'delta'.
  */
-static int gather_surplus_pages(int delta)
+static int gather_surplus_pages(struct hstate *h, int delta)
 {
         struct list_head surplus_list;
         struct page *page, *tmp;
         int ret, i;
         int needed, allocated;
 
-        needed = (resv_huge_pages + delta) - free_huge_pages;
+        needed = (h->resv_huge_pages + delta) - h->free_huge_pages;
         if (needed <= 0) {
-                resv_huge_pages += delta;
+                h->resv_huge_pages += delta;
                 return 0;
         }
 
@@ -673,7 +677,7 @@ static int gather_surplus_pages(int delta)
 retry:
         spin_unlock(&hugetlb_lock);
         for (i = 0; i < needed; i++) {
-                page = alloc_buddy_huge_page(NULL, 0);
+                page = alloc_buddy_huge_page(h, NULL, 0);
                 if (!page) {
                         /*
                          * We were not able to allocate enough pages to
@@ -694,7 +698,8 @@ retry:
          * because either resv_huge_pages or free_huge_pages may have changed.
          */
         spin_lock(&hugetlb_lock);
-        needed = (resv_huge_pages + delta) - (free_huge_pages + allocated);
+        needed = (h->resv_huge_pages + delta) -
+                        (h->free_huge_pages + allocated);
         if (needed > 0)
                 goto retry;
 
@@ -707,7 +712,7 @@ retry:
          * before they are reserved.
          */
         needed += allocated;
-        resv_huge_pages += delta;
+        h->resv_huge_pages += delta;
         ret = 0;
 free:
         /* Free the needed pages to the hugetlb pool */
@@ -715,7 +720,7 @@ free:
                 if ((--needed) < 0)
                         break;
                 list_del(&page->lru);
-                enqueue_huge_page(page);
+                enqueue_huge_page(h, page);
         }
 
         /* Free unnecessary surplus pages to the buddy allocator */
@@ -743,7 +748,8 @@ free:
  * allocated to satisfy the reservation must be explicitly freed if they were
  * never used.
  */
-static void return_unused_surplus_pages(unsigned long unused_resv_pages)
+static void return_unused_surplus_pages(struct hstate *h,
+                                        unsigned long unused_resv_pages)
 {
         static int nid = -1;
         struct page *page;
@@ -758,27 +764,27 @@ static void return_unused_surplus_pages(unsigned long unused_resv_pages)
         unsigned long remaining_iterations = num_online_nodes();
 
         /* Uncommit the reservation */
-        resv_huge_pages -= unused_resv_pages;
+        h->resv_huge_pages -= unused_resv_pages;
 
-        nr_pages = min(unused_resv_pages, surplus_huge_pages);
+        nr_pages = min(unused_resv_pages, h->surplus_huge_pages);
 
         while (remaining_iterations-- && nr_pages) {
                 nid = next_node(nid, node_online_map);
                 if (nid == MAX_NUMNODES)
                         nid = first_node(node_online_map);
 
-                if (!surplus_huge_pages_node[nid])
+                if (!h->surplus_huge_pages_node[nid])
                         continue;
 
-                if (!list_empty(&hugepage_freelists[nid])) {
-                        page = list_entry(hugepage_freelists[nid].next,
+                if (!list_empty(&h->hugepage_freelists[nid])) {
+                        page = list_entry(h->hugepage_freelists[nid].next,
                                           struct page, lru);
                         list_del(&page->lru);
-                        update_and_free_page(page);
-                        free_huge_pages--;
-                        free_huge_pages_node[nid]--;
-                        surplus_huge_pages--;
-                        surplus_huge_pages_node[nid]--;
+                        update_and_free_page(h, page);
+                        h->free_huge_pages--;
+                        h->free_huge_pages_node[nid]--;
+                        h->surplus_huge_pages--;
+                        h->surplus_huge_pages_node[nid]--;
                         nr_pages--;
                         remaining_iterations = num_online_nodes();
                 }
@@ -794,13 +800,14 @@ static void return_unused_surplus_pages(unsigned long unused_resv_pages)
  * an instantiated the change should be committed via vma_commit_reservation.
  * No action is required on failure.
  */
-static int vma_needs_reservation(struct vm_area_struct *vma, unsigned long addr)
+static int vma_needs_reservation(struct hstate *h,
+                        struct vm_area_struct *vma, unsigned long addr)
 {
         struct address_space *mapping = vma->vm_file->f_mapping;
         struct inode *inode = mapping->host;
 
         if (vma->vm_flags & VM_SHARED) {
-                pgoff_t idx = vma_hugecache_offset(vma, addr);
+                pgoff_t idx = vma_hugecache_offset(h, vma, addr);
                 return region_chg(&inode->i_mapping->private_list,
                                                         idx, idx + 1);
 
@@ -809,7 +816,7 @@ static int vma_needs_reservation(struct vm_area_struct *vma, unsigned long addr)
 
         } else  {
                 int err;
-                pgoff_t idx = vma_hugecache_offset(vma, addr);
+                pgoff_t idx = vma_hugecache_offset(h, vma, addr);
                 struct resv_map *reservations = vma_resv_map(vma);
 
                 err = region_chg(&reservations->regions, idx, idx + 1);
@@ -818,18 +825,18 @@ static int vma_needs_reservation(struct vm_area_struct *vma, unsigned long addr)
                 return 0;
         }
 }
-static void vma_commit_reservation(struct vm_area_struct *vma,
-                                                        unsigned long addr)
+static void vma_commit_reservation(struct hstate *h,
+                        struct vm_area_struct *vma, unsigned long addr)
 {
         struct address_space *mapping = vma->vm_file->f_mapping;
         struct inode *inode = mapping->host;
 
         if (vma->vm_flags & VM_SHARED) {
-                pgoff_t idx = vma_hugecache_offset(vma, addr);
+                pgoff_t idx = vma_hugecache_offset(h, vma, addr);
                 region_add(&inode->i_mapping->private_list, idx, idx + 1);
 
         } else if (is_vma_resv_set(vma, HPAGE_RESV_OWNER)) {
-                pgoff_t idx = vma_hugecache_offset(vma, addr);
+                pgoff_t idx = vma_hugecache_offset(h, vma, addr);
                 struct resv_map *reservations = vma_resv_map(vma);
 
                 /* Mark this page used in the map. */
@@ -840,6 +847,7 @@ static void vma_commit_reservation(struct vm_area_struct *vma,
 static struct page *alloc_huge_page(struct vm_area_struct *vma,
                                     unsigned long addr, int avoid_reserve)
 {
+        struct hstate *h = hstate_vma(vma);
         struct page *page;
         struct address_space *mapping = vma->vm_file->f_mapping;
         struct inode *inode = mapping->host;
@@ -852,7 +860,7 @@ static struct page *alloc_huge_page(struct vm_area_struct *vma,
          * MAP_NORESERVE mappings may also need pages and quota allocated
          * if no reserve mapping overlaps.
          */
-        chg = vma_needs_reservation(vma, addr);
+        chg = vma_needs_reservation(h, vma, addr);
         if (chg < 0)
                 return ERR_PTR(chg);
         if (chg)
@@ -860,11 +868,11 @@ static struct page *alloc_huge_page(struct vm_area_struct *vma,
                         return ERR_PTR(-ENOSPC);
 
         spin_lock(&hugetlb_lock);
-        page = dequeue_huge_page_vma(vma, addr, avoid_reserve);
+        page = dequeue_huge_page_vma(h, vma, addr, avoid_reserve);
         spin_unlock(&hugetlb_lock);
 
         if (!page) {
-                page = alloc_buddy_huge_page(vma, addr);
+                page = alloc_buddy_huge_page(h, vma, addr);
                 if (!page) {
                         hugetlb_put_quota(inode->i_mapping, chg);
                         return ERR_PTR(-VM_FAULT_OOM);
@@ -874,7 +882,7 @@ static struct page *alloc_huge_page(struct vm_area_struct *vma,
         set_page_refcounted(page);
         set_page_private(page, (unsigned long) mapping);
 
-        vma_commit_reservation(vma, addr);
+        vma_commit_reservation(h, vma, addr);
 
         return page;
 }
@@ -882,21 +890,28 @@ static struct page *alloc_huge_page(struct vm_area_struct *vma,
 static int __init hugetlb_init(void)
 {
         unsigned long i;
+        struct hstate *h = &default_hstate;
 
         if (HPAGE_SHIFT == 0)
                 return 0;
 
+        if (!h->order) {
+                h->order = HPAGE_SHIFT - PAGE_SHIFT;
+                h->mask = HPAGE_MASK;
+        }
+
         for (i = 0; i < MAX_NUMNODES; ++i)
-                INIT_LIST_HEAD(&hugepage_freelists[i]);
+                INIT_LIST_HEAD(&h->hugepage_freelists[i]);
 
-        hugetlb_next_nid = first_node(node_online_map);
+        h->hugetlb_next_nid = first_node(node_online_map);
 
         for (i = 0; i < max_huge_pages; ++i) {
-                if (!alloc_fresh_huge_page())
+                if (!alloc_fresh_huge_page(h))
                         break;
         }
-        max_huge_pages = free_huge_pages = nr_huge_pages = i;
-        printk("Total HugeTLB memory allocated, %ld\n", free_huge_pages);
+        max_huge_pages = h->free_huge_pages = h->nr_huge_pages = i;
+        printk(KERN_INFO "Total HugeTLB memory allocated, %ld\n",
+                        h->free_huge_pages);
         return 0;
 }
 module_init(hugetlb_init);
@@ -922,34 +937,36 @@ static unsigned int cpuset_mems_nr(unsigned int *array)
 
 #ifdef CONFIG_SYSCTL
 #ifdef CONFIG_HIGHMEM
-static void try_to_free_low(unsigned long count)
+static void try_to_free_low(struct hstate *h, unsigned long count)
 {
         int i;
 
         for (i = 0; i < MAX_NUMNODES; ++i) {
                 struct page *page, *next;
-                list_for_each_entry_safe(page, next, &hugepage_freelists[i], lru) {
-                        if (count >= nr_huge_pages)
+                struct list_head *freel = &h->hugepage_freelists[i];
+                list_for_each_entry_safe(page, next, freel, lru) {
+                        if (count >= h->nr_huge_pages)
                                 return;
                         if (PageHighMem(page))
                                 continue;
                         list_del(&page->lru);
                         update_and_free_page(page);
-                        free_huge_pages--;
-                        free_huge_pages_node[page_to_nid(page)]--;
+                        h->free_huge_pages--;
+                        h->free_huge_pages_node[page_to_nid(page)]--;
                 }
         }
 }
 #else
-static inline void try_to_free_low(unsigned long count)
+static inline void try_to_free_low(struct hstate *h, unsigned long count)
 {
 }
 #endif
 
-#define persistent_huge_pages (nr_huge_pages - surplus_huge_pages)
+#define persistent_huge_pages(h) (h->nr_huge_pages - h->surplus_huge_pages)
 static unsigned long set_max_huge_pages(unsigned long count)
 {
         unsigned long min_count, ret;
+        struct hstate *h = &default_hstate;
 
         /*
          * Increase the pool size
@@ -963,19 +980,19 @@ static unsigned long set_max_huge_pages(unsigned long count)
          * within all the constraints specified by the sysctls.
          */
         spin_lock(&hugetlb_lock);
-        while (surplus_huge_pages && count > persistent_huge_pages) {
-                if (!adjust_pool_surplus(-1))
+        while (h->surplus_huge_pages && count > persistent_huge_pages(h)) {
+                if (!adjust_pool_surplus(h, -1))
                         break;
         }
 
-        while (count > persistent_huge_pages) {
+        while (count > persistent_huge_pages(h)) {
                 /*
                  * If this allocation races such that we no longer need the
                  * page, free_huge_page will handle it by freeing the page
                  * and reducing the surplus.
                  */
                 spin_unlock(&hugetlb_lock);
-                ret = alloc_fresh_huge_page();
+                ret = alloc_fresh_huge_page(h);
                 spin_lock(&hugetlb_lock);
                 if (!ret)
                         goto out;
@@ -997,21 +1014,21 @@ static unsigned long set_max_huge_pages(unsigned long count)
          * and won't grow the pool anywhere else. Not until one of the
          * sysctls are changed, or the surplus pages go out of use.
          */
-        min_count = resv_huge_pages + nr_huge_pages - free_huge_pages;
+        min_count = h->resv_huge_pages + h->nr_huge_pages - h->free_huge_pages;
         min_count = max(count, min_count);
-        try_to_free_low(min_count);
-        while (min_count < persistent_huge_pages) {
-                struct page *page = dequeue_huge_page();
+        try_to_free_low(h, min_count);
+        while (min_count < persistent_huge_pages(h)) {
+                struct page *page = dequeue_huge_page(h);
                 if (!page)
                         break;
-                update_and_free_page(page);
+                update_and_free_page(h, page);
         }
-        while (count < persistent_huge_pages) {
-                if (!adjust_pool_surplus(1))
+        while (count < persistent_huge_pages(h)) {
+                if (!adjust_pool_surplus(h, 1))
                         break;
         }
 out:
-        ret = persistent_huge_pages;
+        ret = persistent_huge_pages(h);
         spin_unlock(&hugetlb_lock);
         return ret;
 }
@@ -1041,9 +1058,10 @@ int hugetlb_overcommit_handler(struct ctl_table *table, int write,
                         struct file *file, void __user *buffer,
                         size_t *length, loff_t *ppos)
 {
+        struct hstate *h = &default_hstate;
         proc_doulongvec_minmax(table, write, file, buffer, length, ppos);
         spin_lock(&hugetlb_lock);
-        nr_overcommit_huge_pages = sysctl_overcommit_huge_pages;
+        h->nr_overcommit_huge_pages = sysctl_overcommit_huge_pages;
         spin_unlock(&hugetlb_lock);
         return 0;
 }
@@ -1052,37 +1070,40 @@ int hugetlb_overcommit_handler(struct ctl_table *table, int write,
 
 int hugetlb_report_meminfo(char *buf)
 {
+        struct hstate *h = &default_hstate;
         return sprintf(buf,
                         "HugePages_Total: %5lu\n"
                         "HugePages_Free:  %5lu\n"
                         "HugePages_Rsvd:  %5lu\n"
                         "HugePages_Surp:  %5lu\n"
                         "Hugepagesize:    %5lu kB\n",
-                        nr_huge_pages,
-                        free_huge_pages,
-                        resv_huge_pages,
-                        surplus_huge_pages,
-                        HPAGE_SIZE/1024);
+                        h->nr_huge_pages,
+                        h->free_huge_pages,
+                        h->resv_huge_pages,
+                        h->surplus_huge_pages,
+                        1UL << (huge_page_order(h) + PAGE_SHIFT - 10));
 }
 
 int hugetlb_report_node_meminfo(int nid, char *buf)
 {
+        struct hstate *h = &default_hstate;
         return sprintf(buf,
                 "Node %d HugePages_Total: %5u\n"
                 "Node %d HugePages_Free:  %5u\n"
                 "Node %d HugePages_Surp:  %5u\n",
-                nid, nr_huge_pages_node[nid],
-                nid, free_huge_pages_node[nid],
-                nid, surplus_huge_pages_node[nid]);
+                nid, h->nr_huge_pages_node[nid],
+                nid, h->free_huge_pages_node[nid],
+                nid, h->surplus_huge_pages_node[nid]);
 }
 
 /* Return the number pages of memory we physically have, in PAGE_SIZE units. */
 unsigned long hugetlb_total_pages(void)
 {
-        return nr_huge_pages * (HPAGE_SIZE / PAGE_SIZE);
+        struct hstate *h = &default_hstate;
+        return h->nr_huge_pages * pages_per_huge_page(h);
 }
 
-static int hugetlb_acct_memory(long delta)
+static int hugetlb_acct_memory(struct hstate *h, long delta)
 {
         int ret = -ENOMEM;
 
@@ -1105,18 +1126,18 @@ static int hugetlb_acct_memory(long delta)
          * semantics that cpuset has.
          */
         if (delta > 0) {
-                if (gather_surplus_pages(delta) < 0)
+                if (gather_surplus_pages(h, delta) < 0)
                         goto out;
 
-                if (delta > cpuset_mems_nr(free_huge_pages_node)) {
-                        return_unused_surplus_pages(delta);
+                if (delta > cpuset_mems_nr(h->free_huge_pages_node)) {
+                        return_unused_surplus_pages(h, delta);
                         goto out;
                 }
         }
 
         ret = 0;
         if (delta < 0)
-                return_unused_surplus_pages((unsigned long) -delta);
+                return_unused_surplus_pages(h, (unsigned long) -delta);
 
 out:
         spin_unlock(&hugetlb_lock);
@@ -1141,14 +1162,15 @@ static void hugetlb_vm_op_open(struct vm_area_struct *vma)
 
 static void hugetlb_vm_op_close(struct vm_area_struct *vma)
 {
+        struct hstate *h = hstate_vma(vma);
         struct resv_map *reservations = vma_resv_map(vma);
         unsigned long reserve;
         unsigned long start;
         unsigned long end;
 
         if (reservations) {
-                start = vma_hugecache_offset(vma, vma->vm_start);
-                end = vma_hugecache_offset(vma, vma->vm_end);
+                start = vma_hugecache_offset(h, vma, vma->vm_start);
+                end = vma_hugecache_offset(h, vma, vma->vm_end);
 
                 reserve = (end - start) -
                         region_count(&reservations->regions, start, end);
@@ -1156,7 +1178,7 @@ static void hugetlb_vm_op_close(struct vm_area_struct *vma)
                 kref_put(&reservations->refs, resv_map_release);
 
                 if (reserve)
-                        hugetlb_acct_memory(-reserve);
+                        hugetlb_acct_memory(h, -reserve);
         }
 }
 
@@ -1214,14 +1236,16 @@ int copy_hugetlb_page_range(struct mm_struct *dst, struct mm_struct *src,
         struct page *ptepage;
         unsigned long addr;
         int cow;
+        struct hstate *h = hstate_vma(vma);
+        unsigned long sz = huge_page_size(h);
 
         cow = (vma->vm_flags & (VM_SHARED | VM_MAYWRITE)) == VM_MAYWRITE;
 
-        for (addr = vma->vm_start; addr < vma->vm_end; addr += HPAGE_SIZE) {
+        for (addr = vma->vm_start; addr < vma->vm_end; addr += sz) {
                 src_pte = huge_pte_offset(src, addr);
                 if (!src_pte)
                         continue;
-                dst_pte = huge_pte_alloc(dst, addr);
+                dst_pte = huge_pte_alloc(dst, addr, sz);
                 if (!dst_pte)
                         goto nomem;
 
@@ -1257,6 +1281,9 @@ void __unmap_hugepage_range(struct vm_area_struct *vma, unsigned long start,
         pte_t pte;
         struct page *page;
         struct page *tmp;
+        struct hstate *h = hstate_vma(vma);
+        unsigned long sz = huge_page_size(h);
+
         /*
          * A page gathering list, protected by per file i_mmap_lock. The
          * lock is used to avoid list corruption from multiple unmapping
@@ -1265,11 +1292,11 @@ void __unmap_hugepage_range(struct vm_area_struct *vma, unsigned long start,
         LIST_HEAD(page_list);
 
         WARN_ON(!is_vm_hugetlb_page(vma));
-        BUG_ON(start & ~HPAGE_MASK);
-        BUG_ON(end & ~HPAGE_MASK);
+        BUG_ON(start & ~huge_page_mask(h));
+        BUG_ON(end & ~huge_page_mask(h));
 
         spin_lock(&mm->page_table_lock);
-        for (address = start; address < end; address += HPAGE_SIZE) {
+        for (address = start; address < end; address += sz) {
                 ptep = huge_pte_offset(mm, address);
                 if (!ptep)
                         continue;
@@ -1383,6 +1410,7 @@ static int hugetlb_cow(struct mm_struct *mm, struct vm_area_struct *vma,
                         unsigned long address, pte_t *ptep, pte_t pte,
                         struct page *pagecache_page)
 {
+        struct hstate *h = hstate_vma(vma);
         struct page *old_page, *new_page;
         int avoidcopy;
         int outside_reserve = 0;
@@ -1443,7 +1471,7 @@ retry_avoidcopy:
         __SetPageUptodate(new_page);
         spin_lock(&mm->page_table_lock);
 
-        ptep = huge_pte_offset(mm, address & HPAGE_MASK);
+        ptep = huge_pte_offset(mm, address & huge_page_mask(h));
         if (likely(pte_same(huge_ptep_get(ptep), pte))) {
                 /* Break COW */
                 huge_ptep_clear_flush(vma, address, ptep);
@@ -1458,14 +1486,14 @@ retry_avoidcopy:
 }
 
 /* Return the pagecache page at a given address within a VMA */
-static struct page *hugetlbfs_pagecache_page(struct vm_area_struct *vma,
-                        unsigned long address)
+static struct page *hugetlbfs_pagecache_page(struct hstate *h,
+                        struct vm_area_struct *vma, unsigned long address)
 {
         struct address_space *mapping;
         pgoff_t idx;
 
         mapping = vma->vm_file->f_mapping;
-        idx = vma_hugecache_offset(vma, address);
+        idx = vma_hugecache_offset(h, vma, address);
 
         return find_lock_page(mapping, idx);
 }
@@ -1473,6 +1501,7 @@ static struct page *hugetlbfs_pagecache_page(struct vm_area_struct *vma,
 static int hugetlb_no_page(struct mm_struct *mm, struct vm_area_struct *vma,
                         unsigned long address, pte_t *ptep, int write_access)
 {
+        struct hstate *h = hstate_vma(vma);
         int ret = VM_FAULT_SIGBUS;
         pgoff_t idx;
         unsigned long size;
@@ -1493,7 +1522,7 @@ static int hugetlb_no_page(struct mm_struct *mm, struct vm_area_struct *vma,
         }
 
         mapping = vma->vm_file->f_mapping;
-        idx = vma_hugecache_offset(vma, address);
+        idx = vma_hugecache_offset(h, vma, address);
 
         /*
          * Use page lock to guard against racing truncation
@@ -1502,7 +1531,7 @@ static int hugetlb_no_page(struct mm_struct *mm, struct vm_area_struct *vma,
 retry:
         page = find_lock_page(mapping, idx);
         if (!page) {
-                size = i_size_read(mapping->host) >> HPAGE_SHIFT;
+                size = i_size_read(mapping->host) >> huge_page_shift(h);
                 if (idx >= size)
                         goto out;
                 page = alloc_huge_page(vma, address, 0);
@@ -1510,7 +1539,7 @@ retry:
                         ret = -PTR_ERR(page);
                         goto out;
                 }
-                clear_huge_page(page, address);
+                clear_huge_page(page, address, huge_page_size(h));
                 __SetPageUptodate(page);
 
                 if (vma->vm_flags & VM_SHARED) {
@@ -1526,14 +1555,14 @@ retry:
                         }
 
                         spin_lock(&inode->i_lock);
-                        inode->i_blocks += BLOCKS_PER_HUGEPAGE;
+                        inode->i_blocks += blocks_per_huge_page(h);
                         spin_unlock(&inode->i_lock);
                 } else
                         lock_page(page);
         }
 
         spin_lock(&mm->page_table_lock);
-        size = i_size_read(mapping->host) >> HPAGE_SHIFT;
+        size = i_size_read(mapping->host) >> huge_page_shift(h);
         if (idx >= size)
                 goto backout;
 
@@ -1569,8 +1598,9 @@ int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
         pte_t entry;
         int ret;
         static DEFINE_MUTEX(hugetlb_instantiation_mutex);
+        struct hstate *h = hstate_vma(vma);
 
-        ptep = huge_pte_alloc(mm, address);
+        ptep = huge_pte_alloc(mm, address, huge_page_size(h));
         if (!ptep)
                 return VM_FAULT_OOM;
 
@@ -1594,7 +1624,7 @@ int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
         if (likely(pte_same(entry, huge_ptep_get(ptep))))
                 if (write_access && !pte_write(entry)) {
                         struct page *page;
-                        page = hugetlbfs_pagecache_page(vma, address);
+                        page = hugetlbfs_pagecache_page(h, vma, address);
                         ret = hugetlb_cow(mm, vma, address, ptep, entry, page);
                         if (page) {
                                 unlock_page(page);
@@ -1615,6 +1645,7 @@ int follow_hugetlb_page(struct mm_struct *mm, struct vm_area_struct *vma,
         unsigned long pfn_offset;
         unsigned long vaddr = *position;
         int remainder = *length;
+        struct hstate *h = hstate_vma(vma);
 
         spin_lock(&mm->page_table_lock);
         while (vaddr < vma->vm_end && remainder) {
@@ -1626,7 +1657,7 @@ int follow_hugetlb_page(struct mm_struct *mm, struct vm_area_struct *vma,
                  * each hugepage.  We have to make * sure we get the
                  * first, for the page indexing below to work.
                  */
-                pte = huge_pte_offset(mm, vaddr & HPAGE_MASK);
+                pte = huge_pte_offset(mm, vaddr & huge_page_mask(h));
 
                 if (!pte || huge_pte_none(huge_ptep_get(pte)) ||
                     (write && !pte_write(huge_ptep_get(pte)))) {
@@ -1644,7 +1675,7 @@ int follow_hugetlb_page(struct mm_struct *mm, struct vm_area_struct *vma,
                         break;
                 }
 
-                pfn_offset = (vaddr & ~HPAGE_MASK) >> PAGE_SHIFT;
+                pfn_offset = (vaddr & ~huge_page_mask(h)) >> PAGE_SHIFT;
                 page = pte_page(huge_ptep_get(pte));
 same_page:
                 if (pages) {
@@ -1660,7 +1691,7 @@ same_page:
                 --remainder;
                 ++i;
                 if (vaddr < vma->vm_end && remainder &&
-                                pfn_offset < HPAGE_SIZE/PAGE_SIZE) {
+                                pfn_offset < pages_per_huge_page(h)) {
                         /*
                          * We use pfn_offset to avoid touching the pageframes
                          * of this compound page.
@@ -1682,13 +1713,14 @@ void hugetlb_change_protection(struct vm_area_struct *vma,
         unsigned long start = address;
         pte_t *ptep;
         pte_t pte;
+        struct hstate *h = hstate_vma(vma);
 
         BUG_ON(address >= end);
         flush_cache_range(vma, address, end);
 
         spin_lock(&vma->vm_file->f_mapping->i_mmap_lock);
         spin_lock(&mm->page_table_lock);
-        for (; address < end; address += HPAGE_SIZE) {
+        for (; address < end; address += huge_page_size(h)) {
                 ptep = huge_pte_offset(mm, address);
                 if (!ptep)
                         continue;
@@ -1711,6 +1743,7 @@ int hugetlb_reserve_pages(struct inode *inode,
                                         struct vm_area_struct *vma)
 {
         long ret, chg;
+        struct hstate *h = hstate_inode(inode);
 
         if (vma && vma->vm_flags & VM_NORESERVE)
                 return 0;
@@ -1739,7 +1772,7 @@ int hugetlb_reserve_pages(struct inode *inode,
 
         if (hugetlb_get_quota(inode->i_mapping, chg))
                 return -ENOSPC;
-        ret = hugetlb_acct_memory(chg);
+        ret = hugetlb_acct_memory(h, chg);
         if (ret < 0) {
                 hugetlb_put_quota(inode->i_mapping, chg);
                 return ret;
@@ -1751,12 +1784,13 @@ int hugetlb_reserve_pages(struct inode *inode,
 
 void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed)
 {
+        struct hstate *h = hstate_inode(inode);
         long chg = region_truncate(&inode->i_mapping->private_list, offset);
 
         spin_lock(&inode->i_lock);
-        inode->i_blocks -= BLOCKS_PER_HUGEPAGE * freed;
+        inode->i_blocks -= blocks_per_huge_page(h);
         spin_unlock(&inode->i_lock);
 
         hugetlb_put_quota(inode->i_mapping, (chg - freed));
-        hugetlb_acct_memory(-(chg - freed));
+        hugetlb_acct_memory(h, -(chg - freed));
 }