From: Johannes Weiner <hannes@cmpxchg.org>
To: Zhaoyang Huang <huangzhaoyang@gmail.com>
Cc: Michal Hocko <mhocko@suse.com>,
Suren Baghdasaryan <surenb@google.com>, Tejun Heo <tj@kernel.org>,
Shakeel Butt <shakeelb@google.com>,
"zhaoyang.huang" <zhaoyang.huang@unisoc.com>,
Linux MM <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>,
Cgroups <cgroups@vger.kernel.org>, Ke Wang <ke.wang@unisoc.com>,
Zefan Li <lizefan.x@bytedance.com>,
Roman Gushchin <roman.gushchin@linux.dev>,
Muchun Song <songmuchun@bytedance.com>
Subject: Re: [RFC PATCH] memcg: use root_mem_cgroup when css is inherited
Date: Thu, 25 Aug 2022 09:35:00 -0400 [thread overview]
Message-ID: <Ywd6hN1Q9MtQWZCp@cmpxchg.org> (raw)
In-Reply-To: <CAGWkznHL_G3OoAc5gJ+iwxqxonr21-fU+F4T2gkpXH68keLpuQ@mail.gmail.com>
On Thu, Aug 25, 2022 at 06:11:09PM +0800, Zhaoyang Huang wrote:
> Sorry for any misunderstanding among the discussion. My purpose is
> real and simple as I have stated from the very beginning that I would
> like to have per-app cgroup hierarchy to charge memory to root if it
> is not enabled explicitly for memory. The reason has also been stated
> like reclaim and workingset regression in suren's report. I don't
> think my proposal will do any harm to current v2's mechanism besides
> asking for the admin echo "+memory" to their desire group.
It would permit children to escape parental control, completely
breaking the hierarchy and delegation guarantees currently in
place. That just isn't going to happen.
Nacked-by: Johannes Weiner <hannes@cmpxchg.org>
I would suggest focusing on finding the root cause for the reclaim
problem you are describing. It's possible all we need is a fix to
reclaim or the workingset code.
prev parent reply other threads:[~2022-08-25 13:35 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-19 11:29 zhaoyang.huang
2022-08-19 16:29 ` Tejun Heo
2022-08-19 17:08 ` Shakeel Butt
2022-08-19 17:10 ` Tejun Heo
[not found] ` <YwNpI1ydy0yDnBH0@dhcp22.suse.cz>
2022-08-23 2:31 ` Zhaoyang Huang
[not found] ` <YwRjyx6wFLk8WTDe@dhcp22.suse.cz>
2022-08-23 6:03 ` Zhaoyang Huang
2022-08-23 8:33 ` Michal Hocko
2022-08-23 9:20 ` Zhaoyang Huang
2022-08-23 11:51 ` Michal Hocko
2022-08-23 16:21 ` Suren Baghdasaryan
2022-08-24 7:59 ` Michal Hocko
2022-08-24 17:13 ` Suren Baghdasaryan
2022-08-24 2:23 ` Zhaoyang Huang
2022-08-24 7:50 ` Michal Hocko
2022-08-24 9:34 ` Zhaoyang Huang
2022-08-24 10:27 ` Michal Hocko
2022-08-25 0:43 ` Zhaoyang Huang
2022-08-25 6:40 ` Michal Hocko
2022-08-25 8:34 ` Zhaoyang Huang
2022-08-25 8:50 ` Michal Hocko
2022-08-25 10:11 ` Zhaoyang Huang
2022-08-25 13:35 ` Johannes Weiner [this message]
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