Tony, Assure that vmem_map's high endpoint is MAX_ORDER aligned. Not doing so violates the buddy allocator algorithm. Also anyone using mem=XXX on boot line and not aligned to MAX_ORDER requires this patch in order to satisfy buddy allocator. vmem_map always starts at pfn 0. The potentially large MAX_ORDER on ia64 (due to hugetlbfs) requires that the end of vmem_map be aligned to MAX_ORDER_NR_PAGES. This was boot tested for: FLATMEM, FLATMEM+VIRTUAL_MEM_MAP, DISCONTIGMEM+VIRTUAL_MEM_MAP and SPARSEMEM. bob Signed-off-by: Bob Picco <bob.picco@xxxxxx> arch/ia64/mm/contig.c | 3 ++- arch/ia64/mm/discontig.c | 3 ++- 2 files changed, 4 insertions(+), 2 deletions(-) Index: linux-2.6.17/arch/ia64/mm/contig.c =================================================================== --- linux-2.6.17.orig/arch/ia64/mm/contig.c 2006-06-19 19:20:11.000000000 -0400 +++ linux-2.6.17/arch/ia64/mm/contig.c 2006-06-19 19:20:12.000000000 -0400 @@ -283,7 +283,8 @@ paging_init (void) /* allocate virtual_mem_map */ - map_size = PAGE_ALIGN(max_low_pfn * sizeof(struct page)); + map_size = PAGE_ALIGN(ALIGN(max_low_pfn, MAX_ORDER_NR_PAGES) * + sizeof(struct page)); vmalloc_end -= map_size; vmem_map = (struct page *) vmalloc_end; efi_memmap_walk(create_mem_map_page_table, NULL); Index: linux-2.6.17/arch/ia64/mm/discontig.c =================================================================== --- linux-2.6.17.orig/arch/ia64/mm/discontig.c 2006-06-19 19:20:11.000000000 -0400 +++ linux-2.6.17/arch/ia64/mm/discontig.c 2006-06-19 19:20:12.000000000 -0400 @@ -675,7 +675,8 @@ void __init paging_init(void) efi_memmap_walk(filter_rsvd_memory, count_node_pages); #ifdef CONFIG_VIRTUAL_MEM_MAP - vmalloc_end -= PAGE_ALIGN(max_low_pfn * sizeof(struct page)); + vmalloc_end -= PAGE_ALIGN(ALIGN(max_low_pfn, MAX_ORDER_NR_PAGES) * + sizeof(struct page)); vmem_map = (struct page *) vmalloc_end; efi_memmap_walk(create_mem_map_page_table, NULL); printk("Virtual mem_map starts at 0x%p\n", vmem_map); - : send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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