From 8e4bff4cab0ddac6060645b0715210484d02ff40 Mon Sep 17 00:00:00 2001
From: Yuval Adam <_@yuv.al>
Date: Wed, 30 Aug 2017 08:25:59 +0000
Subject: Initial file dump from open source release

---
 Documentation/namespaces/resource-control.txt | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 Documentation/namespaces/resource-control.txt

(limited to 'Documentation/namespaces/resource-control.txt')

diff --git a/Documentation/namespaces/resource-control.txt b/Documentation/namespaces/resource-control.txt
new file mode 100644
index 00000000..abc13c39
--- /dev/null
+++ b/Documentation/namespaces/resource-control.txt
@@ -0,0 +1,14 @@
+There are a lot of kinds of objects in the kernel that don't have
+individual limits or that have limits that are ineffective when a set
+of processes is allowed to switch user ids.  With user namespaces
+enabled in a kernel for people who don't trust their users or their
+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 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.
-- 
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