lkml.org 
[lkml]   [2010]   [Dec]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Date
    From
    Subject[PATCH 19/47] writeback: fix increasement of nr_dirtied_pause
    Fix a bug that

    current->nr_dirtied_pause += current->nr_dirtied_pause >> 5;

    does not effectively increase nr_dirtied_pause when it's less than 32.
    Thus nr_dirtied_pause may never grow up.

    Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
    ---
    mm/page-writeback.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- linux-next.orig/mm/page-writeback.c 2010-12-08 22:44:27.000000000 +0800
    +++ linux-next/mm/page-writeback.c 2010-12-08 22:44:28.000000000 +0800
    @@ -700,7 +700,7 @@ pause:
    if (pause == 0 && nr_dirty < background_thresh)
    current->nr_dirtied_pause = ratelimit_pages(bdi);
    else if (pause == 1)
    - current->nr_dirtied_pause += current->nr_dirtied_pause >> 5;
    + current->nr_dirtied_pause += current->nr_dirtied_pause / 32 + 1;
    else if (pause >= HZ/10)
    /*
    * when repeated, writing 1 page per 100ms on slow devices,



    \
     
     \ /
      Last update: 2010-12-13 08:01    [W:0.037 / U:0.088 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site