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    Subject[patch 1/8] memcg: remove unused retry signal from reclaim
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    If the memcg reclaim code detects the target memcg below its limit it
    exits and returns a guaranteed non-zero value so that the charge is
    retried.

    Nowadays, the charge side checks the memcg limit itself and does not
    rely on this non-zero return value trick.

    This patch removes it. The reclaim code will now always return the
    true number of pages it reclaimed on its own.

    Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
    Acked-by: Rik van Riel <riel@redhat.com>
    Acked-by: Ying Han <yinghan@google.com>
    Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
    Reviewed-by: Michal Hocko <mhocko@suse.cz>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
    ---
    mm/memcontrol.c | 2 +-
    1 files changed, 1 insertions(+), 1 deletions(-)

    diff --git a/mm/memcontrol.c b/mm/memcontrol.c
    index 010f916..bf5ab87 100644
    --- a/mm/memcontrol.c
    +++ b/mm/memcontrol.c
    @@ -1503,7 +1503,7 @@ static int mem_cgroup_hierarchical_reclaim(struct mem_cgroup *root_mem,
    if (!res_counter_soft_limit_excess(&root_mem->res))
    return total;
    } else if (mem_cgroup_margin(root_mem))
    - return 1 + total;
    + return total;
    }
    return total;
    }
    --
    1.7.5.2


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