From: Bob Picco Date: Wed, 28 Jun 2006 16:54:55 +0000 (-0400) Subject: [IA64] align high endpoint of VIRTUAL_MEM_MAP X-Git-Tag: v2.6.18-rc4~49^2~1 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=921eea1cdf6ce7f0db88e4579474a04b1fb0fe6d;p=linux-2.6-omap-h63xx.git [IA64] align high endpoint of VIRTUAL_MEM_MAP 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. Signed-off-by: Bob Picco Signed-off-by: Tony Luck --- diff --git a/arch/ia64/mm/contig.c b/arch/ia64/mm/contig.c index 2a88cdd6d92..8919fed9666 100644 --- a/arch/ia64/mm/contig.c +++ b/arch/ia64/mm/contig.c @@ -277,7 +277,8 @@ 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); diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c index 99bd9e30db9..8eeb669917f 100644 --- a/arch/ia64/mm/discontig.c +++ b/arch/ia64/mm/discontig.c @@ -751,7 +751,8 @@ 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);