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Message-ID: <20081203135811.GF17701@balbir.in.ibm.com>
Date: Wed, 3 Dec 2008 19:28:11 +0530
From: Balbir Singh <balbir@...ux.vnet.ibm.com>
To: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc: LKML <linux-kernel@...r.kernel.org>, linux-mm <linux-mm@...ck.org>,
Andrew Morton <akpm@...ux-foundation.org>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
Rik van Riel <riel@...hat.com>
Subject: Re: [PATCH 07/11] memcg: make mem_cgroup_zone_nr_pages()
* KOSAKI Motohiro <kosaki.motohiro@...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@...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@...ux.vnet.ibm.com>
--
Balbir
--
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