Re: [PATCH 07/11] memcg: make mem_cgroup_zone_nr_pages()

[Balbir Singh <balbir@linux.vnet.ibm.com>]

* KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> [2008-12-01 21:16:48]:

> introduce mem_cgroup_zone_nr_pages().
> it is called by zone_nr_pages() helper function.
> 
> 
> this patch doesn't have any behavior change.
> 
> 
> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
> ---
>  include/linux/memcontrol.h |   11 +++++++++++
>  mm/memcontrol.c            |   12 +++++++++++-
>  mm/vmscan.c                |    3 +++
>  3 files changed, 25 insertions(+), 1 deletion(-)
> 
> Index: b/include/linux/memcontrol.h
> ===================================================================
> --- a/include/linux/memcontrol.h
> +++ b/include/linux/memcontrol.h
> @@ -92,6 +92,9 @@ extern long mem_cgroup_calc_reclaim(stru
>  					int priority, enum lru_list lru);
>  int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg,
>  				    struct zone *zone);
> +unsigned long mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg,
> +				       struct zone *zone,
> +				       enum lru_list lru);
> 
>  #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
>  extern int do_swap_account;
> @@ -250,6 +253,14 @@ mem_cgroup_inactive_anon_is_low(struct m
>  	return 1;
>  }
> 
> +static inline unsigned long
> +mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg, struct zone *zone,
> +			 enum lru_list lru)
> +{
> +	return 0;
> +}
> +
> +
>  #endif /* CONFIG_CGROUP_MEM_CONT */
> 
>  #endif /* _LINUX_MEMCONTROL_H */
> Index: b/mm/memcontrol.c
> ===================================================================
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -186,7 +186,6 @@ pcg_default_flags[NR_CHARGE_TYPE] = {
>  	0, /* FORCE */
>  };
> 
> -
>  /* for encoding cft->private value on file */
>  #define _MEM			(0)
>  #define _MEMSWAP		(1)
> @@ -448,6 +447,17 @@ int mem_cgroup_inactive_anon_is_low(stru
>  	return 0;
>  }
> 
> +unsigned long mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg,
> +				       struct zone *zone,
> +				       enum lru_list lru)
> +{
> +	int nid = zone->zone_pgdat->node_id;
> +	int zid = zone_idx(zone);
> +	struct mem_cgroup_per_zone *mz = mem_cgroup_zoneinfo(memcg, nid, zid);
> +
> +	return MEM_CGROUP_ZSTAT(mz, lru);
> +}
> +
>  unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
>  					struct list_head *dst,
>  					unsigned long *scanned, int order,
> Index: b/mm/vmscan.c
> ===================================================================
> --- a/mm/vmscan.c
> +++ b/mm/vmscan.c
> @@ -140,6 +140,9 @@ static struct zone_reclaim_stat *get_rec
>  static unsigned long zone_nr_pages(struct zone *zone, struct scan_control *sc,
>  				   enum lru_list lru)
>  {
> +	if (!scan_global_lru(sc))
> +		return mem_cgroup_zone_nr_pages(sc->mem_cgroup, zone, lru);
> +
>  	return zone_page_state(zone, NR_LRU_BASE + lru);
>  }
>

Seems reasonable

Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com> 

-- 
	Balbir

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