Signed-off-by: Alexey Gladkov --- Documentation/filesystems/proc.rst | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/Documentation/filesystems/proc.rst b/Documentation/filesystems/proc.rst index c8864fcbdec7..3acf178c1202 100644 --- a/Documentation/filesystems/proc.rst +++ b/Documentation/filesystems/proc.rst @@ -2417,7 +2417,8 @@ so will give an `-EBUSY` error). If user namespaces are in use, the kernel additionally checks the instances of procfs available to the mounter and will not allow procfs to be mounted if: - 1. This mount is not fully visible. + 1. This mount is not fully visible unless the new procfs is going to be + mounted with subset=pid option. a. It's root directory is not the root directory of the filesystem. b. If any file or non-empty procfs directory is hidden by another mount. -- 2.53.0