From: ebiederm@xmission.com (Eric W. Biederman)
To: "Serge E. Hallyn" <serge@hallyn.com>
Cc: Linux Containers <containers@lists.linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH review 3/6] userns: Recommend use of memory control groups.
Date: Sat, 26 Jan 2013 22:19:01 -0800 [thread overview]
Message-ID: <87zjzv408a.fsf@xmission.com> (raw)
In-Reply-To: <20130126211312.GD11274@mail.hallyn.com> (Serge E. Hallyn's message of "Sat, 26 Jan 2013 21:13:12 +0000")
"Serge E. Hallyn" <serge@hallyn.com> writes:
> Quoting Eric W. Biederman (ebiederm@xmission.com):
>>
>> In the help text describing user namespaces recommend use of memory
>> control groups. In many cases memory control groups are the only
>> mechanism there is to limit how much memory a user who can create
>> user namespaces can use.
>>
>> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
>
> Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
>
> nit:
>
I have fixed you nit and added the following text, so people know
have a clue where to look to configure cgroups in userspace.
diff --git a/Documentation/namespaces/resource-control.txt b/Documentation/namespaces/resource-control.txt
index 3d8178a..abc13c3 100644
--- a/Documentation/namespaces/resource-control.txt
+++ b/Documentation/namespaces/resource-control.txt
@@ -7,4 +7,8 @@ users programs to play nice this problems becomes more acute.
Therefore it is recommended that memory control groups be enabled in
kernels that enable user namespaces, and it is further recommended
that userspace configure memory control groups to limit how much
-memory users they don't trust to play nice can use.
+memory user's they don't trust to play nice can use.
+
+Memory control groups can be configured by installing the libcgroup
+package present on most distros editing /etc/cgrules.conf,
+/etc/cgconfig.conf and setting up libpam-cgroup.
next prev parent reply other threads:[~2013-01-27 6:19 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-26 2:15 [PATCH review 0/6] miscelaneous user namespace patches Eric W. Biederman
2013-01-26 2:19 ` [PATCH review 1/6] userns: Avoid recursion in put_user_ns Eric W. Biederman
2013-01-26 20:58 ` Serge E. Hallyn
2013-01-28 14:51 ` Vasily Kulikov
2013-01-28 16:34 ` Eric W. Biederman
2013-01-26 2:21 ` [PATCH review 2/6] userns: Allow any uid or gid mappings that don't overlap Eric W. Biederman
2013-01-26 21:08 ` Serge E. Hallyn
2013-01-28 14:28 ` Aristeu Rozanski
2013-01-28 14:41 ` Lord Glauber Costa of Sealand
2013-01-28 15:12 ` Aristeu Rozanski
2013-01-26 2:22 ` [PATCH review 3/6] userns: Recommend use of memory control groups Eric W. Biederman
2013-01-26 21:13 ` Serge E. Hallyn
2013-01-27 6:19 ` Eric W. Biederman [this message]
2013-01-28 7:37 ` Lord Glauber Costa of Sealand
2013-01-28 7:50 ` Lord Glauber Costa of Sealand
2013-01-28 8:14 ` Eric W. Biederman
2013-01-28 8:22 ` Lord Glauber Costa of Sealand
2013-01-28 16:19 ` Eric W. Biederman
2013-01-28 16:37 ` Lord Glauber Costa of Sealand
2013-01-28 17:18 ` Eric W. Biederman
2013-01-28 8:05 ` Eric W. Biederman
2013-01-26 2:23 ` [PATCH review 4/6] userns: Allow the userns root to mount of devpts Eric W. Biederman
2013-01-26 21:22 ` Serge E. Hallyn
2013-01-26 2:26 ` [PATCH review 5/6] userns: Allow the userns root to mount ramfs Eric W. Biederman
2013-01-26 21:29 ` Serge E. Hallyn
2013-01-27 6:09 ` Eric W. Biederman
2013-01-27 18:23 ` Serge E. Hallyn
2013-01-27 18:23 ` Serge E. Hallyn
2013-01-26 2:26 ` [PATCH review 6/6] userns: Allow the userns root to mount tmpfs Eric W. Biederman
2013-01-27 18:23 ` Serge E. Hallyn
2013-01-28 1:28 ` Gao feng
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