[lkml]   [2009]   [Nov]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCH] vmscan: do not evict inactive pages when skipping an active list scan
    On 11/25/2009 03:35 PM, Johannes Weiner wrote:
    > Hello all,
    > On Wed, Nov 25, 2009 at 01:37:52PM -0500, Rik van Riel wrote:
    >> In AIM7 runs, recent kernels start swapping out anonymous pages
    >> well before they should. This is due to shrink_list falling
    >> through to shrink_inactive_list if !inactive_anon_is_low(zone, sc),
    >> when all we really wanted to do is pre-age some anonymous pages to
    >> give them extra time to be referenced while on the inactive list.
    > I do not quite understand what changed 'recently'.
    > That fall-through logic to keep eating inactives when the ratio is off
    > came in a year ago with the second-chance-for-anon-pages patch..?
    The confusion comes from my use of the word
    "recently" here. Larry started testing with
    RHEL 5 as the baseline.

    And yeah - I believe the code may well have
    been wrong ever since it was merged. The
    indentation just looked so pretty that noone
    spotted the bug.

    > Acked-by: Johannes Weiner<>
    Thank you.

     \ /
      Last update: 2009-11-25 21:51    [W:0.028 / U:57.936 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site