vcs.maemo.org Git - kernel-bfs/blob - kernel-bfs-2.6.28/debian/patches/mm-make_swappiness_really_mean_it.patch

   1 Swappiness the tunable lies. It doesn't respect swappiness because it alters
   2 the value when we're more than lightly loaded in the vm. Change it to -really-
   3 mean swappiness unless we're about to go out of memory.
   4
   5 -ck
   6 ---
   7  mm/vmscan.c |    7 ++++++-
   8  1 file changed, 6 insertions(+), 1 deletion(-)
   9
  10 Index: linux-2.6.34-ck1/mm/vmscan.c
  11 ===================================================================
  12 --- linux-2.6.34-ck1.orig/mm/vmscan.c   2010-05-18 12:24:33.974319780 +1000
  13 +++ linux-2.6.34-ck1/mm/vmscan.c        2010-05-18 12:26:16.233444880 +1000
  14 @@ -1633,6 +1633,7 @@ static void shrink_zone(int priority, st
  15         unsigned long nr_reclaimed = 0;
  16         unsigned long percent[2];       /* anon @ 0; file @ 1 */
  17         enum lru_list l;
  18 +       int tmp_priority;
  19
  20         get_scan_ratio(zone, sc, percent);
  21
  22 @@ -1648,7 +1649,11 @@ static void shrink_zone(int priority, st
  23
  24                         scan = zone_page_state(zone, NR_LRU_BASE + l);
  25                         if (priority) {
  26 -                               scan >>= priority;
  27 +                               tmp_priority = priority;
  28 +
  29 +                               if (file && priority > 0)
  30 +                                       tmp_priority = DEF_PRIORITY;
  31 +                               scan >>= tmp_priority;
  32                                 scan = (scan * percent[file]) / 100;
  33                         }
  34                         zone->lru[l].nr_scan += scan;
  35