• Dave Hansen's avatar
    make /proc/$pid/numa_maps gather_stats() take variable page size · eb4866d0
    Dave Hansen authored
    We need to teach the numa_maps code about transparent huge pages.  The
    first step is to teach gather_stats() that the pte it is dealing with
    might represent more than one page.
    
    Note that will we use this in a moment for transparent huge pages since
    they have use a single pmd_t which _acts_ as a "surrogate" for a bunch
    of smaller pte_t's.
    
    I'm a _bit_ unhappy that this interface counts in hugetlbfs page sizes
    for hugetlbfs pages and PAGE_SIZE for normal pages.  That means that to
    figure out how many _bytes_ "dirty=1" means, you must first know the
    hugetlbfs page size.  That's easier said than done especially if you
    don't have visibility in to the mount.
    
    But, that's probably a discussion for another day especially since it
    would change behavior to fix it.  But, just in case anyone wonders why
    this patch only passes a '1' in the hugetlb case...
    Signed-off-by: default avatarDave Hansen <dave@linux.vnet.ibm.com>
    Acked-by: default avatarHugh Dickins <hughd@google.com>
    Acked-by: default avatarDavid Rientjes <rientjes@google.com>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    eb4866d0
task_mmu.c 26.2 KB