linux-kernel - [PATCH v5 5/5] docs: proc: add documentation about relaxing visibility restrictions

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Date:   Wed, 10 Mar 2021 19:20:00 +0100
From:   Alexey Gladkov <gladkov.alexey@...il.com>
To:     LKML <linux-kernel@...r.kernel.org>,
        "Eric W . Biederman" <ebiederm@...ssion.com>
Cc:     Alexey Gladkov <legion@...nel.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Kees Cook <keescook@...omium.org>,
        Linux Containers <containers@...ts.linux-foundation.org>,
        Linux FS Devel <linux-fsdevel@...r.kernel.org>
Subject: [PATCH v5 5/5] docs: proc: add documentation about relaxing visibility restrictions

Signed-off-by: Alexey Gladkov <gladkov.alexey@...il.com>
---
 Documentation/filesystems/proc.rst | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/filesystems/proc.rst b/Documentation/filesystems/proc.rst
index 3daf0e7d1071..9d2985a7aad6 100644
--- a/Documentation/filesystems/proc.rst
+++ b/Documentation/filesystems/proc.rst
@@ -2190,6 +2190,8 @@ available to you and will not allow procfs to be mounted if:
   2. Mount is prohibited if a new mount overrides the readonly option or family
      of atime options.
   3. If any file or non-empty procfs directory is hidden by another filesystem.
+     You can still mount procfs even with overlapped directories if the
+     subset=pid option is used.
 
 Chapter 5: Filesystem behavior
 ==============================
-- 
2.29.2