From: Andrew Morton <akpm@linux-foundation.org>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: "linux-mm@kvack.org" <linux-mm@kvack.org>,
"cgroups@vger.kernel.org" <cgroups@vger.kernel.org>,
Michal Hocko <mhocko@suse.cz>,
Johannes Weiner <hannes@cmpxchg.org>,
Frederic Weisbecker <fweisbec@gmail.com>,
Han Ying <yinghan@google.com>,
Glauber Costa <glommer@parallels.com>, Tejun Heo <tj@kernel.org>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
Hiroyuki Kamezawa <kamezawa.hiroyuki@gmail.com>,
Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 2/6] add res_counter_uncharge_until()
Date: Fri, 11 May 2012 14:19:45 -0700 [thread overview]
Message-ID: <20120511141945.c487e94c.akpm@linux-foundation.org> (raw)
In-Reply-To: <4FACE01A.4040405@jp.fujitsu.com>
On Fri, 11 May 2012 18:47:06 +0900
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> wrote:
> From: Frederic Weisbecker <fweisbec@gmail.com>
>
> At killing res_counter which is a child of other counter,
> we need to do
> res_counter_uncharge(child, xxx)
> res_counter_charge(parent, xxx)
>
> This is not atomic and wasting cpu. This patch adds
> res_counter_uncharge_until(). This function's uncharge propagates
> to ancestors until specified res_counter.
>
> res_counter_uncharge_until(child, parent, xxx)
>
> Now, ops is atomic and efficient.
>
> Changelog since v2
> - removed unnecessary lines.
> - Fixed 'From' , this patch comes from his series. Please signed-off-by if good.
>
> Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Frederic's Signed-off-by: is unavaliable?
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next prev parent reply other threads:[~2012-05-11 21:19 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-11 9:41 [PATCH v3][0/6] memcg: prevent -ENOMEM in pre_destroy() KAMEZAWA Hiroyuki
2012-05-11 9:45 ` [PATCH v3 1/6] memcg: fix error code in hugetlb_force_memcg_empty() KAMEZAWA Hiroyuki
2012-05-11 21:17 ` Andrew Morton
2012-05-14 1:07 ` KAMEZAWA Hiroyuki
2012-05-14 18:15 ` Tejun Heo
2012-05-14 18:32 ` Tejun Heo
2012-05-15 1:10 ` KAMEZAWA Hiroyuki
2012-05-15 15:12 ` Tejun Heo
2012-05-11 9:47 ` [PATCH 2/6] add res_counter_uncharge_until() KAMEZAWA Hiroyuki
2012-05-11 21:19 ` Andrew Morton [this message]
2012-05-14 1:10 ` KAMEZAWA Hiroyuki
2012-05-14 10:08 ` Frederic Weisbecker
2012-05-14 10:32 ` KAMEZAWA Hiroyuki
2012-05-14 10:56 ` Frederic Weisbecker
2012-05-14 18:17 ` Tejun Heo
2012-05-11 9:48 ` [PATCH v3 3/6] memcg: use res_counter_uncharge_until in move_parent() KAMEZAWA Hiroyuki
2012-05-11 9:49 ` [PATCH v3 4/6] memcg: move charges to root cgroup if use_hierarchy=0 KAMEZAWA Hiroyuki
2012-05-14 20:14 ` Tejun Heo
2012-05-15 0:04 ` KAMEZAWA Hiroyuki
2012-05-11 9:50 ` [PATCH v3 5/6] memcg: don't uncharge in mem_cgroup_move_account KAMEZAWA Hiroyuki
2012-05-11 9:53 ` [PATCH v3 6/6] remove __must_check for res_counter_charge_nofail() KAMEZAWA Hiroyuki
2012-05-14 20:09 ` Tejun Heo
2012-05-15 0:02 ` KAMEZAWA Hiroyuki
2012-06-21 20:20 ` [PATCH v3][0/6] memcg: prevent -ENOMEM in pre_destroy() Tejun Heo
2012-06-21 23:27 ` Kamezawa Hiroyuki
2012-06-27 17:58 ` Tejun Heo
2012-06-28 8:33 ` Kamezawa Hiroyuki
2012-06-28 16:06 ` Tejun Heo
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