bootmem: revisit bootmem descriptor list handling

[mirror_ubuntu-artful-kernel.git] / mm / bootmem.c

/*
 *  bootmem - A boot-time physical memory allocator and configurator
 *
 *  Copyright (C) 1999 Ingo Molnar
 *                1999 Kanoj Sarcar, SGI
 *                2008 Johannes Weiner
 *
 * Access to this subsystem has to be serialized externally (which is true
 * for the boot process anyway).
 */
#include <linux/init.h>
#include <linux/pfn.h>
#include <linux/bootmem.h>
#include <linux/module.h>

#include <asm/bug.h>
#include <asm/io.h>
#include <asm/processor.h>

#include "internal.h"

unsigned long max_low_pfn;
unsigned long min_low_pfn;
unsigned long max_pfn;

#ifdef CONFIG_CRASH_DUMP
/*
 * If we have booted due to a crash, max_pfn will be a very low value. We need
 * to know the amount of memory that the previous kernel used.
 */
unsigned long saved_max_pfn;
#endif

bootmem_data_t bootmem_node_data[MAX_NUMNODES] __initdata;

static struct list_head bdata_list __initdata = LIST_HEAD_INIT(bdata_list);

static int bootmem_debug;

static int __init bootmem_debug_setup(char *buf)
{
        bootmem_debug = 1;
        return 0;
}
early_param("bootmem_debug", bootmem_debug_setup);

#define bdebug(fmt, args...) ({                         \
        if (unlikely(bootmem_debug))                    \
                printk(KERN_INFO                        \
                        "bootmem::%s " fmt,             \
                        __FUNCTION__, ## args);         \
})

static unsigned long __init bootmap_bytes(unsigned long pages)
{
        unsigned long bytes = (pages + 7) / 8;

        return ALIGN(bytes, sizeof(long));
}

/**
 * bootmem_bootmap_pages - calculate bitmap size in pages
 * @pages: number of pages the bitmap has to represent
 */
unsigned long __init bootmem_bootmap_pages(unsigned long pages)
{
        unsigned long bytes = bootmap_bytes(pages);

        return PAGE_ALIGN(bytes) >> PAGE_SHIFT;
}

/*
 * link bdata in order
 */
static void __init link_bootmem(bootmem_data_t *bdata)
{
        struct list_head *iter;

        list_for_each(iter, &bdata_list) {
                bootmem_data_t *ent;

                ent = list_entry(iter, bootmem_data_t, list);
                if (bdata->node_boot_start < ent->node_boot_start)
                        break;
        }
        list_add_tail(&bdata->list, iter);
}

/*
 * Called once to set up the allocator itself.
 */
static unsigned long __init init_bootmem_core(bootmem_data_t *bdata,
        unsigned long mapstart, unsigned long start, unsigned long end)
{
        unsigned long mapsize;

        mminit_validate_memmodel_limits(&start, &end);
        bdata->node_bootmem_map = phys_to_virt(PFN_PHYS(mapstart));
        bdata->node_boot_start = PFN_PHYS(start);
        bdata->node_low_pfn = end;
        link_bootmem(bdata);

        /*
         * Initially all pages are reserved - setup_arch() has to
         * register free RAM areas explicitly.
         */
        mapsize = bootmap_bytes(end - start);
        memset(bdata->node_bootmem_map, 0xff, mapsize);

        bdebug("nid=%td start=%lx map=%lx end=%lx mapsize=%lx\n",
                bdata - bootmem_node_data, start, mapstart, end, mapsize);

        return mapsize;
}

/**
 * init_bootmem_node - register a node as boot memory
 * @pgdat: node to register
 * @freepfn: pfn where the bitmap for this node is to be placed
 * @startpfn: first pfn on the node
 * @endpfn: first pfn after the node
 *
 * Returns the number of bytes needed to hold the bitmap for this node.
 */
unsigned long __init init_bootmem_node(pg_data_t *pgdat, unsigned long freepfn,
                                unsigned long startpfn, unsigned long endpfn)
{
        return init_bootmem_core(pgdat->bdata, freepfn, startpfn, endpfn);
}

/**
 * init_bootmem - register boot memory
 * @start: pfn where the bitmap is to be placed
 * @pages: number of available physical pages
 *
 * Returns the number of bytes needed to hold the bitmap.
 */
unsigned long __init init_bootmem(unsigned long start, unsigned long pages)
{
        max_low_pfn = pages;
        min_low_pfn = start;
        return init_bootmem_core(NODE_DATA(0)->bdata, start, 0, pages);
}

static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata)
{
        struct page *page;
        unsigned long pfn;
        unsigned long i, count;
        unsigned long idx, pages;
        unsigned long *map;
        int gofast = 0;

        BUG_ON(!bdata->node_bootmem_map);

        count = 0;
        /* first extant page of the node */
        pfn = PFN_DOWN(bdata->node_boot_start);
        idx = bdata->node_low_pfn - pfn;
        map = bdata->node_bootmem_map;
        /*
         * Check if we are aligned to BITS_PER_LONG pages.  If so, we might
         * be able to free page orders of that size at once.
         */
        if (!(pfn & (BITS_PER_LONG-1)))
                gofast = 1;

        for (i = 0; i < idx; ) {
                unsigned long v = ~map[i / BITS_PER_LONG];

                if (gofast && v == ~0UL) {
                        int order;

                        page = pfn_to_page(pfn);
                        count += BITS_PER_LONG;
                        order = ffs(BITS_PER_LONG) - 1;
                        __free_pages_bootmem(page, order);
                        i += BITS_PER_LONG;
                        page += BITS_PER_LONG;
                } else if (v) {
                        unsigned long m;

                        page = pfn_to_page(pfn);
                        for (m = 1; m && i < idx; m<<=1, page++, i++) {
                                if (v & m) {
                                        count++;
                                        __free_pages_bootmem(page, 0);
                                }
                        }
                } else {
                        i += BITS_PER_LONG;
                }
                pfn += BITS_PER_LONG;
        }

        /*
         * Now free the allocator bitmap itself, it's not
         * needed anymore:
         */
        page = virt_to_page(bdata->node_bootmem_map);
        pages = bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start);
        idx = bootmem_bootmap_pages(pages);
        for (i = 0; i < idx; i++, page++)
                __free_pages_bootmem(page, 0);
        count += i;
        bdata->node_bootmem_map = NULL;

        bdebug("nid=%td released=%lx\n", bdata - bootmem_node_data, count);

        return count;
}

/**
 * free_all_bootmem_node - release a node's free pages to the buddy allocator
 * @pgdat: node to be released
 *
 * Returns the number of pages actually released.
 */
unsigned long __init free_all_bootmem_node(pg_data_t *pgdat)
{
        register_page_bootmem_info_node(pgdat);
        return free_all_bootmem_core(pgdat->bdata);
}

/**
 * free_all_bootmem - release free pages to the buddy allocator
 *
 * Returns the number of pages actually released.
 */
unsigned long __init free_all_bootmem(void)
{
        return free_all_bootmem_core(NODE_DATA(0)->bdata);
}

static void __init free_bootmem_core(bootmem_data_t *bdata, unsigned long addr,
                                     unsigned long size)
{
        unsigned long sidx, eidx;
        unsigned long i;

        BUG_ON(!size);

        /* out range */
        if (addr + size < bdata->node_boot_start ||
                PFN_DOWN(addr) > bdata->node_low_pfn)
                return;
        /*
         * round down end of usable mem, partially free pages are
         * considered reserved.
         */

        if (addr >= bdata->node_boot_start && addr < bdata->last_success)
                bdata->last_success = addr;

        /*
         * Round up to index to the range.
         */
        if (PFN_UP(addr) > PFN_DOWN(bdata->node_boot_start))
                sidx = PFN_UP(addr) - PFN_DOWN(bdata->node_boot_start);
        else
                sidx = 0;

        eidx = PFN_DOWN(addr + size - bdata->node_boot_start);
        if (eidx > bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start))
                eidx = bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start);

        bdebug("nid=%td start=%lx end=%lx\n", bdata - bootmem_node_data,
                sidx + PFN_DOWN(bdata->node_boot_start),
                eidx + PFN_DOWN(bdata->node_boot_start));

        for (i = sidx; i < eidx; i++) {
                if (unlikely(!test_and_clear_bit(i, bdata->node_bootmem_map)))
                        BUG();
        }
}

/**
 * free_bootmem_node - mark a page range as usable
 * @pgdat: node the range resides on
 * @physaddr: starting address of the range
 * @size: size of the range in bytes
 *
 * Partial pages will be considered reserved and left as they are.
 *
 * Only physical pages that actually reside on @pgdat are marked.
 */
void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
                              unsigned long size)
{
        free_bootmem_core(pgdat->bdata, physaddr, size);
}

/**
 * free_bootmem - mark a page range as usable
 * @addr: starting address of the range
 * @size: size of the range in bytes
 *
 * Partial pages will be considered reserved and left as they are.
 *
 * All physical pages within the range are marked, no matter what
 * node they reside on.
 */
void __init free_bootmem(unsigned long addr, unsigned long size)
{
        bootmem_data_t *bdata;
        list_for_each_entry(bdata, &bdata_list, list)
                free_bootmem_core(bdata, addr, size);
}

/*
 * Marks a particular physical memory range as unallocatable. Usable RAM
 * might be used for boot-time allocations - or it might get added
 * to the free page pool later on.
 */
static int __init can_reserve_bootmem_core(bootmem_data_t *bdata,
                        unsigned long addr, unsigned long size, int flags)
{
        unsigned long sidx, eidx;
        unsigned long i;

        BUG_ON(!size);

        /* out of range, don't hold other */
        if (addr + size < bdata->node_boot_start ||
                PFN_DOWN(addr) > bdata->node_low_pfn)
                return 0;

        /*
         * Round up to index to the range.
         */
        if (addr > bdata->node_boot_start)
                sidx= PFN_DOWN(addr - bdata->node_boot_start);
        else
                sidx = 0;

        eidx = PFN_UP(addr + size - bdata->node_boot_start);
        if (eidx > bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start))
                eidx = bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start);

        for (i = sidx; i < eidx; i++) {
                if (test_bit(i, bdata->node_bootmem_map)) {
                        if (flags & BOOTMEM_EXCLUSIVE)
                                return -EBUSY;
                }
        }

        return 0;

}

static void __init reserve_bootmem_core(bootmem_data_t *bdata,
                        unsigned long addr, unsigned long size, int flags)
{
        unsigned long sidx, eidx;
        unsigned long i;

        BUG_ON(!size);

        /* out of range */
        if (addr + size < bdata->node_boot_start ||
                PFN_DOWN(addr) > bdata->node_low_pfn)
                return;

        /*
         * Round up to index to the range.
         */
        if (addr > bdata->node_boot_start)
                sidx= PFN_DOWN(addr - bdata->node_boot_start);
        else
                sidx = 0;

        eidx = PFN_UP(addr + size - bdata->node_boot_start);
        if (eidx > bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start))
                eidx = bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start);

        bdebug("nid=%td start=%lx end=%lx flags=%x\n",
                bdata - bootmem_node_data,
                sidx + PFN_DOWN(bdata->node_boot_start),
                eidx + PFN_DOWN(bdata->node_boot_start),
                flags);

        for (i = sidx; i < eidx; i++)
                if (test_and_set_bit(i, bdata->node_bootmem_map))
                        bdebug("hm, page %lx reserved twice.\n",
                                PFN_DOWN(bdata->node_boot_start) + i);
}

/**
 * reserve_bootmem_node - mark a page range as reserved
 * @pgdat: node the range resides on
 * @physaddr: starting address of the range
 * @size: size of the range in bytes
 * @flags: reservation flags (see linux/bootmem.h)
 *
 * Partial pages will be reserved.
 *
 * Only physical pages that actually reside on @pgdat are marked.
 */
int __init reserve_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
                                 unsigned long size, int flags)
{
        int ret;

        ret = can_reserve_bootmem_core(pgdat->bdata, physaddr, size, flags);
        if (ret < 0)
                return -ENOMEM;
        reserve_bootmem_core(pgdat->bdata, physaddr, size, flags);
        return 0;
}

#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
/**
 * reserve_bootmem - mark a page range as usable
 * @addr: starting address of the range
 * @size: size of the range in bytes
 * @flags: reservation flags (see linux/bootmem.h)
 *
 * Partial pages will be reserved.
 *
 * All physical pages within the range are marked, no matter what
 * node they reside on.
 */
int __init reserve_bootmem(unsigned long addr, unsigned long size,
                            int flags)
{
        bootmem_data_t *bdata;
        int ret;

        list_for_each_entry(bdata, &bdata_list, list) {
                ret = can_reserve_bootmem_core(bdata, addr, size, flags);
                if (ret < 0)
                        return ret;
        }
        list_for_each_entry(bdata, &bdata_list, list)
                reserve_bootmem_core(bdata, addr, size, flags);

        return 0;
}
#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */

/*
 * We 'merge' subsequent allocations to save space. We might 'lose'
 * some fraction of a page if allocations cannot be satisfied due to
 * size constraints on boxes where there is physical RAM space
 * fragmentation - in these cases (mostly large memory boxes) this
 * is not a problem.
 *
 * On low memory boxes we get it right in 100% of the cases.
 *
 * alignment has to be a power of 2 value.
 *
 * NOTE:  This function is _not_ reentrant.
 */
static void * __init
alloc_bootmem_core(struct bootmem_data *bdata, unsigned long size,
                unsigned long align, unsigned long goal, unsigned long limit)
{
        unsigned long areasize, preferred;
        unsigned long i, start = 0, incr, eidx, end_pfn;
        void *ret;
        unsigned long node_boot_start;
        void *node_bootmem_map;

        if (!size) {
                printk("alloc_bootmem_core(): zero-sized request\n");
                BUG();
        }
        BUG_ON(align & (align-1));

        /* on nodes without memory - bootmem_map is NULL */
        if (!bdata->node_bootmem_map)
                return NULL;

        bdebug("nid=%td size=%lx [%lu pages] align=%lx goal=%lx limit=%lx\n",
                bdata - bootmem_node_data, size, PAGE_ALIGN(size) >> PAGE_SHIFT,
                align, goal, limit);

        /* bdata->node_boot_start is supposed to be (12+6)bits alignment on x86_64 ? */
        node_boot_start = bdata->node_boot_start;
        node_bootmem_map = bdata->node_bootmem_map;
        if (align) {
                node_boot_start = ALIGN(bdata->node_boot_start, align);
                if (node_boot_start > bdata->node_boot_start)
                        node_bootmem_map = (unsigned long *)bdata->node_bootmem_map +
                            PFN_DOWN(node_boot_start - bdata->node_boot_start)/BITS_PER_LONG;
        }

        if (limit && node_boot_start >= limit)
                return NULL;

        end_pfn = bdata->node_low_pfn;
        limit = PFN_DOWN(limit);
        if (limit && end_pfn > limit)
                end_pfn = limit;

        eidx = end_pfn - PFN_DOWN(node_boot_start);

        /*
         * We try to allocate bootmem pages above 'goal'
         * first, then we try to allocate lower pages.
         */
        preferred = 0;
        if (goal && PFN_DOWN(goal) < end_pfn) {
                if (goal > node_boot_start)
                        preferred = goal - node_boot_start;

                if (bdata->last_success > node_boot_start &&
                        bdata->last_success - node_boot_start >= preferred)
                        if (!limit || (limit && limit > bdata->last_success))
                                preferred = bdata->last_success - node_boot_start;
        }

        preferred = PFN_DOWN(ALIGN(preferred, align));
        areasize = (size + PAGE_SIZE-1) / PAGE_SIZE;
        incr = align >> PAGE_SHIFT ? : 1;

restart_scan:
        for (i = preferred; i < eidx;) {
                unsigned long j;

                i = find_next_zero_bit(node_bootmem_map, eidx, i);
                i = ALIGN(i, incr);
                if (i >= eidx)
                        break;
                if (test_bit(i, node_bootmem_map)) {
                        i += incr;
                        continue;
                }
                for (j = i + 1; j < i + areasize; ++j) {
                        if (j >= eidx)
                                goto fail_block;
                        if (test_bit(j, node_bootmem_map))
                                goto fail_block;
                }
                start = i;
                goto found;
        fail_block:
                i = ALIGN(j, incr);
                if (i == j)
                        i += incr;
        }

        if (preferred > 0) {
                preferred = 0;
                goto restart_scan;
        }
        return NULL;

found:
        bdata->last_success = PFN_PHYS(start) + node_boot_start;
        BUG_ON(start >= eidx);

        /*
         * Is the next page of the previous allocation-end the start
         * of this allocation's buffer? If yes then we can 'merge'
         * the previous partial page with this allocation.
         */
        if (align < PAGE_SIZE &&
            bdata->last_offset && bdata->last_pos+1 == start) {
                unsigned long offset, remaining_size;
                offset = ALIGN(bdata->last_offset, align);
                BUG_ON(offset > PAGE_SIZE);
                remaining_size = PAGE_SIZE - offset;
                if (size < remaining_size) {
                        areasize = 0;
                        /* last_pos unchanged */
                        bdata->last_offset = offset + size;
                        ret = phys_to_virt(bdata->last_pos * PAGE_SIZE +
                                           offset + node_boot_start);
                } else {
                        remaining_size = size - remaining_size;
                        areasize = (remaining_size + PAGE_SIZE-1) / PAGE_SIZE;
                        ret = phys_to_virt(bdata->last_pos * PAGE_SIZE +
                                           offset + node_boot_start);
                        bdata->last_pos = start + areasize - 1;
                        bdata->last_offset = remaining_size;
                }
                bdata->last_offset &= ~PAGE_MASK;
        } else {
                bdata->last_pos = start + areasize - 1;
                bdata->last_offset = size & ~PAGE_MASK;
                ret = phys_to_virt(start * PAGE_SIZE + node_boot_start);
        }

        bdebug("nid=%td start=%lx end=%lx\n",
                bdata - bootmem_node_data,
                start + PFN_DOWN(bdata->node_boot_start),
                start + areasize + PFN_DOWN(bdata->node_boot_start));

        /*
         * Reserve the area now:
         */
        for (i = start; i < start + areasize; i++)
                if (unlikely(test_and_set_bit(i, node_bootmem_map)))
                        BUG();
        memset(ret, 0, size);
        return ret;
}

/**
 * __alloc_bootmem_nopanic - allocate boot memory without panicking
 * @size: size of the request in bytes
 * @align: alignment of the region
 * @goal: preferred starting address of the region
 *
 * The goal is dropped if it can not be satisfied and the allocation will
 * fall back to memory below @goal.
 *
 * Allocation may happen on any node in the system.
 *
 * Returns NULL on failure.
 */
void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align,
                                      unsigned long goal)
{
        bootmem_data_t *bdata;
        void *ptr;

        list_for_each_entry(bdata, &bdata_list, list) {
                ptr = alloc_bootmem_core(bdata, size, align, goal, 0);
                if (ptr)
                        return ptr;
        }
        return NULL;
}

/**
 * __alloc_bootmem - allocate boot memory
 * @size: size of the request in bytes
 * @align: alignment of the region
 * @goal: preferred starting address of the region
 *
 * The goal is dropped if it can not be satisfied and the allocation will
 * fall back to memory below @goal.
 *
 * Allocation may happen on any node in the system.
 *
 * The function panics if the request can not be satisfied.
 */
void * __init __alloc_bootmem(unsigned long size, unsigned long align,
                              unsigned long goal)
{
        void *mem = __alloc_bootmem_nopanic(size,align,goal);

        if (mem)
                return mem;
        /*
         * Whoops, we cannot satisfy the allocation request.
         */
        printk(KERN_ALERT "bootmem alloc of %lu bytes failed!\n", size);
        panic("Out of memory");
        return NULL;
}

/**
 * __alloc_bootmem_node - allocate boot memory from a specific node
 * @pgdat: node to allocate from
 * @size: size of the request in bytes
 * @align: alignment of the region
 * @goal: preferred starting address of the region
 *
 * The goal is dropped if it can not be satisfied and the allocation will
 * fall back to memory below @goal.
 *
 * Allocation may fall back to any node in the system if the specified node
 * can not hold the requested memory.
 *
 * The function panics if the request can not be satisfied.
 */
void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
                                   unsigned long align, unsigned long goal)
{
        void *ptr;

        ptr = alloc_bootmem_core(pgdat->bdata, size, align, goal, 0);
        if (ptr)
                return ptr;

        return __alloc_bootmem(size, align, goal);
}

#ifdef CONFIG_SPARSEMEM
/**
 * alloc_bootmem_section - allocate boot memory from a specific section
 * @size: size of the request in bytes
 * @section_nr: sparse map section to allocate from
 *
 * Return NULL on failure.
 */
void * __init alloc_bootmem_section(unsigned long size,
                                    unsigned long section_nr)
{
        void *ptr;
        unsigned long limit, goal, start_nr, end_nr, pfn;
        struct pglist_data *pgdat;

        pfn = section_nr_to_pfn(section_nr);
        goal = PFN_PHYS(pfn);
        limit = PFN_PHYS(section_nr_to_pfn(section_nr + 1)) - 1;
        pgdat = NODE_DATA(early_pfn_to_nid(pfn));
        ptr = alloc_bootmem_core(pgdat->bdata, size, SMP_CACHE_BYTES, goal,
                                limit);

        if (!ptr)
                return NULL;

        start_nr = pfn_to_section_nr(PFN_DOWN(__pa(ptr)));
        end_nr = pfn_to_section_nr(PFN_DOWN(__pa(ptr) + size));
        if (start_nr != section_nr || end_nr != section_nr) {
                printk(KERN_WARNING "alloc_bootmem failed on section %ld.\n",
                       section_nr);
                free_bootmem_core(pgdat->bdata, __pa(ptr), size);
                ptr = NULL;
        }

        return ptr;
}
#endif

void * __init __alloc_bootmem_node_nopanic(pg_data_t *pgdat, unsigned long size,
                                   unsigned long align, unsigned long goal)
{
        void *ptr;

        ptr = alloc_bootmem_core(pgdat->bdata, size, align, goal, 0);
        if (ptr)
                return ptr;

        return __alloc_bootmem_nopanic(size, align, goal);
}

#ifndef ARCH_LOW_ADDRESS_LIMIT
#define ARCH_LOW_ADDRESS_LIMIT  0xffffffffUL
#endif

/**
 * __alloc_bootmem_low - allocate low boot memory
 * @size: size of the request in bytes
 * @align: alignment of the region
 * @goal: preferred starting address of the region
 *
 * The goal is dropped if it can not be satisfied and the allocation will
 * fall back to memory below @goal.
 *
 * Allocation may happen on any node in the system.
 *
 * The function panics if the request can not be satisfied.
 */
void * __init __alloc_bootmem_low(unsigned long size, unsigned long align,
                                  unsigned long goal)
{
        bootmem_data_t *bdata;
        void *ptr;

        list_for_each_entry(bdata, &bdata_list, list) {
                ptr = alloc_bootmem_core(bdata, size, align, goal,
                                        ARCH_LOW_ADDRESS_LIMIT);
                if (ptr)
                        return ptr;
        }

        /*
         * Whoops, we cannot satisfy the allocation request.
         */
        printk(KERN_ALERT "low bootmem alloc of %lu bytes failed!\n", size);
        panic("Out of low memory");
        return NULL;
}

/**
 * __alloc_bootmem_low_node - allocate low boot memory from a specific node
 * @pgdat: node to allocate from
 * @size: size of the request in bytes
 * @align: alignment of the region
 * @goal: preferred starting address of the region
 *
 * The goal is dropped if it can not be satisfied and the allocation will
 * fall back to memory below @goal.
 *
 * Allocation may fall back to any node in the system if the specified node
 * can not hold the requested memory.
 *
 * The function panics if the request can not be satisfied.
 */
void * __init __alloc_bootmem_low_node(pg_data_t *pgdat, unsigned long size,
                                       unsigned long align, unsigned long goal)
{
        return alloc_bootmem_core(pgdat->bdata, size, align, goal,
                                ARCH_LOW_ADDRESS_LIMIT);
}