From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
To: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Hugh Dickins <hughd@google.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Johannes Weiner <hannes@cmpxchg.org>,
Andrew Morton <akpm@linux-foundation.org>,
Andi Kleen <andi@firstfloor.org>
Subject: Re: [PATCH v3 02/21] memcg: make mm_match_cgroup() hirarchical
Date: Tue, 28 Feb 2012 09:11:44 +0900 [thread overview]
Message-ID: <20120228091144.d174ad7b.kamezawa.hiroyu@jp.fujitsu.com> (raw)
In-Reply-To: <20120223135146.12988.47611.stgit@zurg>
On Thu, 23 Feb 2012 17:51:46 +0400
Konstantin Khlebnikov <khlebnikov@openvz.org> wrote:
> Check mm-owner cgroup membership hierarchically.
>
> Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Ack. but ... see below.
> ---
> include/linux/memcontrol.h | 11 ++---------
> mm/memcontrol.c | 20 ++++++++++++++++++++
> 2 files changed, 22 insertions(+), 9 deletions(-)
>
> diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
> index 8c4d74f..4822d53 100644
> --- a/include/linux/memcontrol.h
> +++ b/include/linux/memcontrol.h
> @@ -87,15 +87,8 @@ extern struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm);
> extern struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg);
> extern struct mem_cgroup *mem_cgroup_from_cont(struct cgroup *cont);
>
> -static inline
> -int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup)
> -{
> - struct mem_cgroup *memcg;
> - rcu_read_lock();
> - memcg = mem_cgroup_from_task(rcu_dereference((mm)->owner));
> - rcu_read_unlock();
> - return cgroup == memcg;
> -}
> +extern int mm_match_cgroup(const struct mm_struct *mm,
> + const struct mem_cgroup *cgroup);
>
> extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *memcg);
>
> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> index b8039d2..77f5d48 100644
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -821,6 +821,26 @@ struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p)
> struct mem_cgroup, css);
> }
>
> +/**
> + * mm_match_cgroup - cgroup hierarchy mm membership test
> + * @mm mm_struct to test
> + * @cgroup target cgroup
> + *
> + * Returns true if mm belong this cgroup or any its child in hierarchy
belongs to ?
> + */
> +int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup)
> +{
Please use "memcg" for representing "memory cgroup" (other function's arguments uses "memcg")
> + struct mem_cgroup *memcg;
So, rename this as *cur_memcg or some.
> +
> + rcu_read_lock();
> + memcg = mem_cgroup_from_task(rcu_dereference((mm)->owner));
> + while (memcg != cgroup && memcg && memcg->use_hierarchy)
> + memcg = parent_mem_cgroup(memcg);
IIUC, parent_mem_cgroup() checks mem->res.parent. mem->res.parent is set only when
parent->use_hierarchy == true. Then,
while (memcg != cgroup)
memcg = parent_mem_cgroup(memcg);
will be enough.
Thanks,
-Kame
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next prev parent reply other threads:[~2012-02-28 0:13 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-23 13:51 [PATCH v3 00/21] mm: lru_lock splitting Konstantin Khlebnikov
2012-02-23 13:51 ` [PATCH v3 01/21] memcg: unify inactive_ratio calculation Konstantin Khlebnikov
2012-02-28 0:05 ` KAMEZAWA Hiroyuki
2012-02-23 13:51 ` [PATCH v3 02/21] memcg: make mm_match_cgroup() hirarchical Konstantin Khlebnikov
2012-02-23 18:03 ` Johannes Weiner
2012-02-23 19:46 ` Konstantin Khlebnikov
2012-02-23 22:06 ` Johannes Weiner
2012-02-28 0:11 ` KAMEZAWA Hiroyuki [this message]
2012-02-28 6:31 ` Konstantin Khlebnikov
2012-02-23 13:51 ` [PATCH v3 03/21] memcg: fix page_referencies cgroup filter on global reclaim Konstantin Khlebnikov
2012-02-28 0:13 ` KAMEZAWA Hiroyuki
2012-02-23 13:51 ` [PATCH v3 04/21] memcg: use vm_swappiness from target memory cgroup Konstantin Khlebnikov
2012-02-28 0:15 ` KAMEZAWA Hiroyuki
2012-02-23 13:52 ` [PATCH v3 05/21] mm: rename lruvec->lists into lruvec->pages_lru Konstantin Khlebnikov
2012-02-28 0:20 ` KAMEZAWA Hiroyuki
2012-02-28 6:04 ` Konstantin Khlebnikov
2012-02-23 13:52 ` [PATCH v3 06/21] mm: lruvec linking functions Konstantin Khlebnikov
2012-02-28 0:27 ` KAMEZAWA Hiroyuki
2012-02-28 6:09 ` Konstantin Khlebnikov
2012-02-23 13:52 ` [PATCH v3 07/21] mm: add lruvec->pages_count Konstantin Khlebnikov
2012-02-28 0:35 ` KAMEZAWA Hiroyuki
2012-02-28 6:16 ` Konstantin Khlebnikov
2012-02-23 13:52 ` [PATCH v3 08/21] mm: unify inactive_list_is_low() Konstantin Khlebnikov
2012-02-28 0:36 ` KAMEZAWA Hiroyuki
2012-02-23 13:52 ` [PATCH v3 09/21] mm: add lruvec->reclaim_stat Konstantin Khlebnikov
2012-02-28 0:38 ` KAMEZAWA Hiroyuki
2012-02-23 13:52 ` [PATCH v3 10/21] mm: kill struct mem_cgroup_zone Konstantin Khlebnikov
2012-02-28 0:41 ` KAMEZAWA Hiroyuki
2012-02-23 13:52 ` [PATCH v3 11/21] mm: move page-to-lruvec translation upper Konstantin Khlebnikov
2012-02-28 0:42 ` KAMEZAWA Hiroyuki
2012-02-23 13:52 ` [PATCH v3 12/21] mm: push lruvec into update_page_reclaim_stat() Konstantin Khlebnikov
2012-02-28 0:44 ` KAMEZAWA Hiroyuki
2012-02-23 13:52 ` [PATCH v3 13/21] mm: push lruvecs from pagevec_lru_move_fn() to iterator Konstantin Khlebnikov
2012-02-28 0:45 ` KAMEZAWA Hiroyuki
2012-02-23 13:52 ` [PATCH v3 14/21] mm: introduce lruvec locking primitives Konstantin Khlebnikov
2012-02-28 0:56 ` KAMEZAWA Hiroyuki
2012-02-28 6:23 ` Konstantin Khlebnikov
2012-02-23 13:52 ` [PATCH v3 15/21] mm: handle lruvec relocks on lumpy reclaim Konstantin Khlebnikov
2012-02-28 1:01 ` KAMEZAWA Hiroyuki
2012-02-28 6:25 ` Konstantin Khlebnikov
2012-02-23 13:52 ` [PATCH v3 16/21] mm: handle lruvec relocks in compaction Konstantin Khlebnikov
2012-02-28 1:13 ` KAMEZAWA Hiroyuki
2012-02-28 6:31 ` Konstantin Khlebnikov
2012-02-23 13:53 ` [PATCH v3 17/21] mm: handle lruvec relock in memory controller Konstantin Khlebnikov
2012-02-28 1:22 ` KAMEZAWA Hiroyuki
2012-02-23 13:53 ` [PATCH v3 18/21] mm: add to lruvec isolated pages counters Konstantin Khlebnikov
2012-02-24 5:32 ` Konstantin Khlebnikov
2012-02-28 1:38 ` KAMEZAWA Hiroyuki
2012-02-23 13:53 ` [PATCH v3 19/21] memcg: check lru vectors emptiness in pre-destroy Konstantin Khlebnikov
2012-02-28 1:43 ` KAMEZAWA Hiroyuki
2012-02-23 13:53 ` [PATCH v3 20/21] mm: split zone->lru_lock Konstantin Khlebnikov
2012-02-28 1:49 ` KAMEZAWA Hiroyuki
2012-02-28 6:39 ` Konstantin Khlebnikov
2012-02-23 13:53 ` [PATCH v3 21/21] mm: zone lru vectors interleaving Konstantin Khlebnikov
2012-02-23 14:44 ` Hillf Danton
2012-02-23 16:21 ` Andi Kleen
2012-02-23 18:48 ` [PATCH 1/2] mm: configure lruvec split by boot options Konstantin Khlebnikov
2012-02-23 18:48 ` [PATCH 2/2] mm: show zone lruvec state in /proc/zoneinfo Konstantin Khlebnikov
2012-02-25 0:05 ` [PATCH v3 00/21] mm: lru_lock splitting Tim Chen
2012-02-25 5:34 ` Konstantin Khlebnikov
2012-02-25 2:15 ` KAMEZAWA Hiroyuki
2012-02-25 5:31 ` Konstantin Khlebnikov
2012-02-26 23:54 ` KAMEZAWA Hiroyuki
2012-02-28 1:52 ` KAMEZAWA Hiroyuki
2012-02-28 6:49 ` Konstantin Khlebnikov
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