lkml.org 
[lkml]   [2005]   [Sep]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Date
    From
    Subject[PATCH 04/21] mm: zap_pte_range dont dirty anon
    zap_pte_range already avoids wasting time to mark_page_accessed on anon
    pages: it can also skip anon set_page_dirty - the page only needs to be
    marked dirty if shared with another mm, but that will say pte_dirty too.

    Signed-off-by: Hugh Dickins <hugh@veritas.com>
    ---

    mm/memory.c | 10 ++++++----
    1 files changed, 6 insertions(+), 4 deletions(-)

    --- mm03/mm/memory.c 2005-09-24 19:26:38.000000000 +0100
    +++ mm04/mm/memory.c 2005-09-24 19:27:05.000000000 +0100
    @@ -574,12 +574,14 @@ static void zap_pte_range(struct mmu_gat
    addr) != page->index)
    set_pte_at(tlb->mm, addr, pte,
    pgoff_to_pte(page->index));
    - if (pte_dirty(ptent))
    - set_page_dirty(page);
    if (PageAnon(page))
    dec_mm_counter(tlb->mm, anon_rss);
    - else if (pte_young(ptent))
    - mark_page_accessed(page);
    + else {
    + if (pte_dirty(ptent))
    + set_page_dirty(page);
    + if (pte_young(ptent))
    + mark_page_accessed(page);
    + }
    tlb->freed++;
    page_remove_rmap(page);
    tlb_remove_page(tlb, page);
    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/
    \
     
     \ /
      Last update: 2005-09-25 17:52    [W:0.021 / U:61.996 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site