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SubjectRe: [patch]x86: arch_add_memory round up address
On Wed, Oct 8, 2008 at 10:31 PM, Shaohua Li <shaohua.li@intel.com> wrote:
> Round up address to a page, otherwise the last page isn't mapped.
>
> Signed-off-by: Shaohua Li <shaohua.li@intel.com>
> ---
> arch/x86/mm/init_64.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> Index: linux/arch/x86/mm/init_64.c
> ===================================================================
> --- linux.orig/arch/x86/mm/init_64.c 2008-10-09 11:42:33.000000000 +0800
> +++ linux/arch/x86/mm/init_64.c 2008-10-09 11:43:22.000000000 +0800
> @@ -721,7 +721,8 @@ int arch_add_memory(int nid, u64 start,
> unsigned long nr_pages = size >> PAGE_SHIFT;
> int ret;
>
> - last_mapped_pfn = init_memory_mapping(start, start + size-1);
> + last_mapped_pfn = init_memory_mapping(start,
> + round_up(start + size-1, PAGE_SIZE));
> if (last_mapped_pfn > max_pfn_mapped)
> max_pfn_mapped = last_mapped_pfn;

should use

last_mapped_pfn = init_memory_mapping(start, start + size);

YH


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