linux-kernel - [PATCH] Documentation: android: binderfs: add 'stats' mount option

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Message-ID: <baa0aa81-007d-af46-16a5-91fead0bd1b9@infradead.org>
Date:   Wed, 8 Apr 2020 10:29:50 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     LKML <linux-kernel@...r.kernel.org>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
        "devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>
Cc:     Hridya Valsaraju <hridya@...gle.com>,
        Christian Brauner <christian.brauner@...ntu.com>,
        Christian Brauner <christian@...uner.io>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
        Jonathan Corbet <corbet@....net>
Subject: [PATCH] Documentation: android: binderfs: add 'stats' mount option

From: Randy Dunlap <rdunlap@...radead.org>

Add documentation of the binderfs 'stats' mount option.

Description taken from the commit message.

Fixes: f00834518ed3 ("binder: add a mount option to show global stats")
Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Cc: Hridya Valsaraju <hridya@...gle.com>
Cc: Christian Brauner <christian.brauner@...ntu.com>
Cc: Christian Brauner <christian@...uner.io>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: devel@...verdev.osuosl.org
---
 Documentation/admin-guide/binderfs.rst |    6 ++++++
 1 file changed, 6 insertions(+)

--- linux-next-20200408.orig/Documentation/admin-guide/binderfs.rst
+++ linux-next-20200408/Documentation/admin-guide/binderfs.rst
@@ -33,6 +33,12 @@ max
   a per-instance limit. If ``max=<count>`` is set then only ``<count>`` number
   of binder devices can be allocated in this binderfs instance.
 
+stats
+  Using ``stats=global`` enables global binder statistics.
+  ``stats=global`` is only available for a binderfs instance mounted in the
+  initial user namespace. An attempt to use the option to mount a binderfs
+  instance in another user namespace will return a permission error.
+
 Allocating binder Devices
 -------------------------