Messages in this thread Patch in this message | | | Date | Mon, 17 Nov 2008 15:23:46 -0500 | From | Rik van Riel <> | Subject | Re: [PATCH] vmscan: fix get_scan_ratio comment |
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Fix the old comment on the scan ratio calculations.
Signed-off-by: Rik van Riel <riel@redhat.com> --- mm/vmscan.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
Index: linux-2.6.28-rc5/mm/vmscan.c =================================================================== --- linux-2.6.28-rc5.orig/mm/vmscan.c 2008-11-16 17:47:13.000000000 -0500 +++ linux-2.6.28-rc5/mm/vmscan.c 2008-11-17 15:22:22.000000000 -0500 @@ -1386,9 +1386,9 @@ static void get_scan_ratio(struct zone * file_prio = 200 - sc->swappiness; /* - * anon recent_rotated[0] - * %anon = 100 * ----------- / ----------------- * IO cost - * anon + file rotate_sum + * The amount of pressure on anon vs file pages is inversely + * proportional to the fraction of recently scanned pages on + * each list that were recently referenced and in active use. */ ap = (anon_prio + 1) * (zone->recent_scanned[0] + 1); ap /= zone->recent_rotated[0] + 1;
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