Re: [v4][PATCH 2/2] fix large pages in pagemap

[Dave Hansen <dave@linux.vnet.ibm.com>]

On Wed, 2008-06-11 at 13:11 -0700, Andrew Morton wrote:
> Really?  There already a couple of pmd_huge() tests in mm/memory.c and
> Rik's access_process_vm-device-memory-infrastructure.patch adds
> another one.

We're not supposed to ever hit the one in follow_page() because there
are:

                if (is_vm_hugetlb_page(vma)) {
                        i = follow_hugetlb_page(mm, vma, pages, vmas,
                                                &start, &len, i, write);
                        continue;
                }

checks before them like in get_user_pages();

The other mm/memory.c call is under alloc_vm_area(), and that's
supposedly only used on kernel addresses.  I don't think we even have
Linux pagetables for kernel addresses on ppc.

-- Dave

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>