From: Konstantin Khlebnikov <khlebnikov@openvz.org>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Hugh Dickins <hughd@google.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-mm@kvack.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 10:31:51 +0400 [thread overview]
Message-ID: <4F4C74D7.90704@openvz.org> (raw)
In-Reply-To: <20120228091144.d174ad7b.kamezawa.hiroyu@jp.fujitsu.com>
KAMEZAWA Hiroyuki wrote:
> 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.
Here will be mem_cgroup_same_or_subtree(), see reply from Johannes Weiner.
>
> Thanks,
> -Kame
>
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next prev parent reply other threads:[~2012-02-28 6:31 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
2012-02-28 6:31 ` Konstantin Khlebnikov [this message]
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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