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| author | Eric W. Biederman <ebiederm@xmission.com> | 2013-01-26 01:48:31 +0100 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2013-01-27 07:20:06 +0100 |
| commit | e11f0ae388f227d7ad03953e19034dec55286650 (patch) | |
| tree | 10caa137fd9c8db3473f297ab43a8ae591235043 /init | |
| parent | userns: Allow any uid or gid mappings that don't overlap. (diff) | |
| download | linux-e11f0ae388f227d7ad03953e19034dec55286650.tar.xz linux-e11f0ae388f227d7ad03953e19034dec55286650.zip | |
userns: Recommend use of memory control groups.
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.
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/init/Kconfig b/init/Kconfig index 7d30240e5bfe..c8c58bddfed3 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -1035,6 +1035,13 @@ config USER_NS help This allows containers, i.e. vservers, to use user namespaces to provide different user info for different servers. + + When user namespaces are enabled in the kernel it is + recommended that the MEMCG and MEMCG_KMEM options also be + enabled and that user-space use the memory control groups to + limit the amount of memory a memory unprivileged users can + use. + If unsure, say N. config PID_NS |