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Message-ID: <2E04DD7753BE0E4ABABF0B664610AD6F2621907D@dggeml508-mbx.china.huawei.com>
Date: Mon, 27 Jul 2020 03:14:28 +0000
From: jingrui <jingrui@...wei.com>
To: Michal Hocko <mhocko@...nel.org>
CC: "tj@...nel.org" <tj@...nel.org>, Lizefan <lizefan@...wei.com>,
"hannes@...xchg.org" <hannes@...xchg.org>,
"vdavydov.dev@...il.com" <vdavydov.dev@...il.com>,
"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
"linux-mm@...ck.org" <linux-mm@...ck.org>,
"cgroups@...r.kernel.org" <cgroups@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
caihaomin <caihaomin@...wei.com>,
"Weiwei (N)" <wick.wei@...wei.com>,
"Fangxiuning (Jack, EulerOS)" <fangxiuning@...wei.com>
Subject: RE: 答复: PROBLEM: cgroup cost too much memory when transfer small files to tmpfs
Cc Fangxiuning
On Fri 24-07-20 09:35:26, jingrui wrote:
>
> On Friday, July 24, 2020 3:55 PM, Michal Hocko wrote:
>
> > What is the reason to run under !root cgroup in those sessions if you do not care about accounting anyway?
>
> The systemd not support run those sessions under root cgroup, disable
> pam-systemd will not create session/cgroup, but this is not safe and
> make systemd-logind not work.
Could you be more specific please?
As I know, when user call sftp client to send files, the server will call pam-systemd.so lib to create session and cgroup.
We can skip call pam-systemd.so by config /etc/pam.d/password-auth drop the line " -session optional pam_systemd.so".
But this config is global, and will affect other services, such as ssh login. We don’t find a way just don’t create cgroup dir for sftp.
@Xiuning Would you please take a look and give some suggestion?
--
Michal Hocko
SUSE Labs
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