On Thu 11-08-11 08:44:56, KAMEZAWA Hiroyuki wrote:
>
> > > > /*
> > > > * Always updating the nodemask is not very good - even if we have an empty
> > > > * list or the wrong list here, we can start from some node and traverse all
> > > > @@ -1575,7 +1593,6 @@ static bool test_mem_cgroup_node_reclaim
> > > > */
> > >
> > > Would be good to update the function comment as well (we still have 10s
> > > period there).
> > >
> >
> how about this ?
> ==
>
> Update function's comment. The behavior is changed by commit 453a9bf3
>
> Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
>
> ---
> mm/memcontrol.c | 5 +----
> 1 file changed, 1 insertion(+), 4 deletions(-)
>
> Index: mmotm-Aug3/mm/memcontrol.c
> ===================================================================
> --- mmotm-Aug3.orig/mm/memcontrol.c
> +++ mmotm-Aug3/mm/memcontrol.c
> @@ -1568,10 +1568,7 @@ static bool test_mem_cgroup_node_reclaim
> #if MAX_NUMNODES > 1
>
> /*
> - * Always updating the nodemask is not very good - even if we have an empty
> - * list or the wrong list here, we can start from some node and traverse all
> - * nodes based on the zonelist. So update the list loosely once per 10 secs.
> - *
> + * Update scan nodemask with memcg's event_counter(NUMAINFO_EVENTS_TARGET)
> */
> static void mem_cgroup_may_update_nodemask(struct mem_cgroup *mem)
> {
I would keep the first part about reasoning and just replace the one
about 10 secs update.
--
Michal Hocko
SUSE Labs
SUSE LINUX s.r.o.
Lihovarska 1060/12
190 00 Praha 9
Czech Republic
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