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    Subject[PATCH 11/11] memcg: show reclaim_stat
    Date
    added following four field to memory.stat file.

    - recent_rotated_anon
    - recent_rotated_file
    - recent_scanned_anon
    - recent_scanned_file

    it is useful for memcg reclaim debugging.


    Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
    ---
    mm/memcontrol.c | 25 +++++++++++++++++++++++++
    1 file changed, 25 insertions(+)

    Index: b/mm/memcontrol.c
    ===================================================================
    --- a/mm/memcontrol.c
    +++ b/mm/memcontrol.c
    @@ -1799,6 +1799,31 @@ static int mem_control_stat_show(struct

    cb->fill(cb, "inactive_ratio", mem_cont->inactive_ratio);

    + {
    + int nid, zid;
    + struct mem_cgroup_per_zone *mz;
    + unsigned long recent_rotated[2] = {0, 0};
    + unsigned long recent_scanned[2] = {0, 0};
    +
    + for_each_online_node(nid)
    + for (zid = 0; zid < MAX_NR_ZONES; zid++) {
    + mz = mem_cgroup_zoneinfo(mem_cont, nid, zid);
    +
    + recent_rotated[0] +=
    + mz->reclaim_stat.recent_rotated[0];
    + recent_rotated[1] +=
    + mz->reclaim_stat.recent_rotated[1];
    + recent_scanned[0] +=
    + mz->reclaim_stat.recent_scanned[0];
    + recent_scanned[1] +=
    + mz->reclaim_stat.recent_scanned[1];
    + }
    + cb->fill(cb, "recent_rotated_anon", recent_rotated[0]);
    + cb->fill(cb, "recent_rotated_file", recent_rotated[1]);
    + cb->fill(cb, "recent_scanned_anon", recent_scanned[0]);
    + cb->fill(cb, "recent_scanned_file", recent_scanned[1]);
    + }
    +
    return 0;
    }




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