From: Tejun Heo <tj@kernel.org>
To: Li Zefan <lizefan@huawei.com>
Cc: Michal Hocko <mhocko@suse.cz>,
hannes@cmpxchg.org, bsingharora@gmail.com,
kamezawa.hiroyu@jp.fujitsu.com, cgroups@vger.kernel.org,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCHSET cgroup/for-3.12] cgroup: make cgroup_event specific to memcg
Date: Thu, 8 Aug 2013 21:00:32 -0400 [thread overview]
Message-ID: <20130809010032.GA14792@mtj.dyndns.org> (raw)
In-Reply-To: <5203081C.8050403@huawei.com>
Hello, Li.
On Thu, Aug 08, 2013 at 10:53:16AM +0800, Li Zefan wrote:
> I would like to see this happen. I have a feeling that we're deprecating
> features a bit aggressively without providing alternatives.
I'd rework it prolly next week but this has to go one way or another.
There's no way we're implementing userland interface this complex in
cgroup proper. It is a gross layering violation. We don't implement
userland visible interface this complex in low level subsystems. It's
wrong both in principle and leads to all sorts of problems in practice
like ending up worrying about userland abuses in memcg event source
implementation, which is utterly bonkers if you ask me.
Thanks.
--
tejun
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prev parent reply other threads:[~2013-08-09 1:00 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-04 16:07 Tejun Heo
2013-08-04 16:07 ` [PATCH 1/5] cgroup: implement CFTYPE_NO_PREFIX Tejun Heo
2013-08-04 16:07 ` [PATCH 2/5] cgroup: export __cgroup_from_dentry() and __cgroup_dput() Tejun Heo
2013-08-05 2:58 ` Li Zefan
2013-08-05 15:40 ` Tejun Heo
2013-08-05 17:08 ` [PATCH v2 2/5] cgroup: make __cgroup_from_dentry() and __cgroup_dput() global Tejun Heo
2013-08-04 16:07 ` [PATCH 3/5] cgroup, memcg: move cgroup_event implementation to memcg Tejun Heo
2013-08-05 3:14 ` Li Zefan
2013-08-05 17:09 ` [PATCH v2 " Tejun Heo
2013-08-06 2:02 ` Li Zefan
2013-08-06 2:21 ` Li Zefan
2013-08-06 3:26 ` [PATCH " Balbir Singh
2013-08-06 14:09 ` Tejun Heo
2013-08-06 16:03 ` Balbir Singh
2013-08-04 16:07 ` [PATCH 4/5] cgroup, memcg: move cgroup->event_list[_lock] and event callbacks into memcg Tejun Heo
2013-08-04 16:07 ` [PATCH 5/5] memcg: rename cgroup_event to mem_cgroup_event Tejun Heo
2013-08-05 3:26 ` Li Zefan
2013-08-05 17:10 ` [PATCH v2 " Tejun Heo
2013-08-05 16:01 ` [PATCHSET cgroup/for-3.12] cgroup: make cgroup_event specific to memcg Michal Hocko
2013-08-05 16:29 ` Tejun Heo
2013-08-05 19:16 ` Michal Hocko
2013-08-05 19:44 ` Tejun Heo
2013-08-06 15:58 ` Michal Hocko
2013-08-06 16:15 ` Tejun Heo
2013-08-07 12:18 ` Michal Hocko
2013-08-07 12:43 ` Tejun Heo
2013-08-07 13:26 ` Michal Hocko
2013-08-07 13:36 ` Tejun Heo
2013-08-08 2:53 ` Li Zefan
2013-08-09 1:00 ` Tejun Heo [this message]
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