On Tue 22-04-14 11:59:23, Michal Hocko wrote:
> On Sat 19-04-14 07:01:43, Jianyu Zhan wrote:
> > introduce helper mem_cgroup_zoneinfo_zone(). This will make
> > mem_cgroup_iter() code more compact.
>
> I dunno. Helpers are usually nice but this one adds more code then it
> removes. It also doesn't help the generated code.
>
> So I don't see any reason to merge it.
So should we drop it from mmotm?
> > Signed-off-by: Jianyu Zhan <nasa4836@xxxxxxxxx>
> > ---
> > mm/memcontrol.c | 15 +++++++++++----
> > 1 file changed, 11 insertions(+), 4 deletions(-)
> >
> > diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> > index e0ce15c..80d9e38 100644
> > --- a/mm/memcontrol.c
> > +++ b/mm/memcontrol.c
> > @@ -683,6 +683,15 @@ mem_cgroup_zoneinfo(struct mem_cgroup *memcg, int nid, int zid)
> > return &memcg->nodeinfo[nid]->zoneinfo[zid];
> > }
> >
> > +static struct mem_cgroup_per_zone *
> > +mem_cgroup_zoneinfo_zone(struct mem_cgroup *memcg, struct zone *zone)
> > +{
> > + int nid = zone_to_nid(zone);
> > + int zid = zone_idx(zone);
> > +
> > + return mem_cgroup_zoneinfo(memcg, nid, zid);
> > +}
> > +
> > struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *memcg)
> > {
> > return &memcg->css;
> > @@ -1232,11 +1241,9 @@ struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *root,
> >
> > rcu_read_lock();
> > if (reclaim) {
> > - int nid = zone_to_nid(reclaim->zone);
> > - int zid = zone_idx(reclaim->zone);
> > struct mem_cgroup_per_zone *mz;
> >
> > - mz = mem_cgroup_zoneinfo(root, nid, zid);
> > + mz = mem_cgroup_zoneinfo_zone(root, reclaim->zone);
> > iter = &mz->reclaim_iter[reclaim->priority];
> > if (prev && reclaim->generation != iter->generation) {
> > iter->last_visited = NULL;
> > @@ -1340,7 +1347,7 @@ struct lruvec *mem_cgroup_zone_lruvec(struct zone *zone,
> > goto out;
> > }
> >
> > - mz = mem_cgroup_zoneinfo(memcg, zone_to_nid(zone), zone_idx(zone));
> > + mz = mem_cgroup_zoneinfo_zone(memcg, zone);
> > lruvec = &mz->lruvec;
> > out:
> > /*
> > --
> > 1.9.0.GIT
> >
>
> --
> Michal Hocko
> SUSE Labs
> --
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--
Michal Hocko
SUSE Labs
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