Marking this patch as memcg is quite misleading. mm is more suitable.
On Mon 25-06-12 16:43:32, Wanpeng Li wrote:
> From: Wanpeng Li <liwp@xxxxxxxxxxxxxxxxxx>
>
> Since LRU_ALL_EVICTABLE is useless, just remove it.
It's really strange but I do not see any usage of this except for it's
introduction. So agreed to remove it.
> Add LRU_ALL_UNEVICTABLE to mask unevictable pages.
Does it really make sense to introduce just for two uses in a single
function?
>
> Signed-off-by: Wanpeng Li <liwp.linux@xxxxxxxxx>
> ---
> include/linux/mmzone.h | 2 +-
> mm/memcontrol.c | 4 ++--
> 2 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
> index 68c569f..5873620 100644
> --- a/include/linux/mmzone.h
> +++ b/include/linux/mmzone.h
> @@ -209,7 +209,7 @@ struct lruvec {
> /* Mask used at gathering information at once (see memcontrol.c) */
> #define LRU_ALL_FILE (BIT(LRU_INACTIVE_FILE) | BIT(LRU_ACTIVE_FILE))
> #define LRU_ALL_ANON (BIT(LRU_INACTIVE_ANON) | BIT(LRU_ACTIVE_ANON))
> -#define LRU_ALL_EVICTABLE (LRU_ALL_FILE | LRU_ALL_ANON)
> +#define LRU_ALL_UNEVICTABLE (BIT(LRU_UNEVICTABLE))
> #define LRU_ALL ((1 << NR_LRU_LISTS) - 1)
>
> /* Isolate clean file */
> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> index 724bd02..ccda728 100644
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -4033,11 +4033,11 @@ static int mem_control_numa_stat_show(struct cgroup *cont, struct cftype *cft,
> }
> seq_putc(m, '\n');
>
> - unevictable_nr = mem_cgroup_nr_lru_pages(memcg, BIT(LRU_UNEVICTABLE));
> + unevictable_nr = mem_cgroup_nr_lru_pages(memcg, LRU_ALL_UNEVICTABLE);
> seq_printf(m, "unevictable=%lu", unevictable_nr);
> for_each_node_state(nid, N_HIGH_MEMORY) {
> node_nr = mem_cgroup_node_nr_lru_pages(memcg, nid,
> - BIT(LRU_UNEVICTABLE));
> + LRU_ALL_UNEVICTABLE);
> seq_printf(m, " N%d=%lu", nid, node_nr);
> }
> seq_putc(m, '\n');
> --
> 1.7.9.5
>
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--
Michal Hocko
SUSE Labs
SUSE LINUX s.r.o.
Lihovarska 1060/12
190 00 Praha 9
Czech Republic
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