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    SubjectRe: [PATCH] [Cleanup] memcg: export memory cgroup's swappiness v2
    On Wed, 29 Jun 2011 19:03:25 +0900
    KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> wrote:

    > Each memory cgroup has 'swappiness' value and it can be accessed by
    > get_swappiness(memcg). The major user is try_to_free_mem_cgroup_pages()
    > and swappiness is passed by argument. It's propagated by scan_control.
    >
    > get_swappiness is static function but some planned updates will need to
    > get swappiness from files other than memcontrol.c
    > This patch exports get_swappiness() as mem_cgroup_swappiness().
    > By this, we can remove the argument of swapiness from try_to_free...
    > and drop swappiness from scan_control. only memcg uses it.
    >

    > +extern unsigned int mem_cgroup_swappiness(struct mem_cgroup *mem);
    > +unsigned int mem_cgroup_swappiness(struct mem_cgroup *memcg)
    > +static int vmscan_swappiness(struct scan_control *sc)

    The patch seems a bit confused about the signedness of swappiness.


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