diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/bootmem.c | 60 |
1 files changed, 34 insertions, 26 deletions
diff --git a/mm/bootmem.c b/mm/bootmem.c index 3c012fb58745..0f30bc873ecc 100644 --- a/mm/bootmem.c +++ b/mm/bootmem.c @@ -206,9 +206,11 @@ void * __init __alloc_bootmem_core(struct bootmem_data *bdata, unsigned long size, unsigned long align, unsigned long goal, unsigned long limit) { - unsigned long offset, remaining_size, areasize, preferred; + 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"); @@ -216,23 +218,29 @@ __alloc_bootmem_core(struct bootmem_data *bdata, unsigned long size, } BUG_ON(align & (align-1)); - if (limit && bdata->node_boot_start >= limit) - return NULL; - /* on nodes without memory - bootmem_map is NULL */ if (!bdata->node_bootmem_map) return NULL; + /* 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(bdata->node_boot_start); - offset = 0; - if (align && (bdata->node_boot_start & (align - 1UL)) != 0) - offset = align - (bdata->node_boot_start & (align - 1UL)); - offset = PFN_DOWN(offset); + eidx = end_pfn - PFN_DOWN(node_boot_start); /* * We try to allocate bootmem pages above 'goal' @@ -240,15 +248,16 @@ __alloc_bootmem_core(struct bootmem_data *bdata, unsigned long size, */ preferred = 0; if (goal && PFN_DOWN(goal) < end_pfn) { - if (goal > bdata->node_boot_start) - preferred = goal - bdata->node_boot_start; + if (goal > node_boot_start) + preferred = goal - node_boot_start; - if (bdata->last_success >= preferred) + 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; + preferred = bdata->last_success - node_boot_start; } - preferred = PFN_DOWN(ALIGN(preferred, align)) + offset; + preferred = PFN_DOWN(ALIGN(preferred, align)); areasize = (size + PAGE_SIZE-1) / PAGE_SIZE; incr = align >> PAGE_SHIFT ? : 1; @@ -256,18 +265,18 @@ restart_scan: for (i = preferred; i < eidx;) { unsigned long j; - i = find_next_zero_bit(bdata->node_bootmem_map, eidx, i); + i = find_next_zero_bit(node_bootmem_map, eidx, i); i = ALIGN(i, incr); if (i >= eidx) break; - if (test_bit(i, bdata->node_bootmem_map)) { + 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, bdata->node_bootmem_map)) + if (test_bit(j, node_bootmem_map)) goto fail_block; } start = i; @@ -278,14 +287,14 @@ restart_scan: i += incr; } - if (preferred > offset) { - preferred = offset; + if (preferred > 0) { + preferred = 0; goto restart_scan; } return NULL; found: - bdata->last_success = PFN_PHYS(start); + bdata->last_success = PFN_PHYS(start) + node_boot_start; BUG_ON(start >= eidx); /* @@ -295,6 +304,7 @@ found: */ 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; @@ -303,14 +313,12 @@ found: /* last_pos unchanged */ bdata->last_offset = offset + size; ret = phys_to_virt(bdata->last_pos * PAGE_SIZE + - offset + - bdata->node_boot_start); + 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 + - bdata->node_boot_start); + offset + node_boot_start); bdata->last_pos = start + areasize - 1; bdata->last_offset = remaining_size; } @@ -318,14 +326,14 @@ found: } else { bdata->last_pos = start + areasize - 1; bdata->last_offset = size & ~PAGE_MASK; - ret = phys_to_virt(start * PAGE_SIZE + bdata->node_boot_start); + ret = phys_to_virt(start * PAGE_SIZE + node_boot_start); } /* * Reserve the area now: */ for (i = start; i < start + areasize; i++) - if (unlikely(test_and_set_bit(i, bdata->node_bootmem_map))) + if (unlikely(test_and_set_bit(i, node_bootmem_map))) BUG(); memset(ret, 0, size); return ret; |