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+.\" Copyright (C) 1994, 1995, Daniel Quinlan <quinlan@yggdrasil.com>
+.\" Copyright (C) 2002-2008, 2017, Michael Kerrisk <mtk.manpages@gmail.com>
+.\" Copyright (C) 2023, Alejandro Colomar <alx@kernel.org>
+.\"
+.\" SPDX-License-Identifier: GPL-3.0-or-later
+.\"
+.TH proc_pid_mountstats 5 2023-08-15 "Linux man-pages 6.7"
+.SH NAME
+/proc/pid/mountstats \- mount statistics
+.SH DESCRIPTION
+.TP
+.IR /proc/ pid /mountstats " (since Linux 2.6.17)"
+This file exports information (statistics, configuration information)
+about the mounts in the process's mount namespace (see
+.BR mount_namespaces (7)).
+Lines in this file have the form:
+.IP
+.in +4n
+.EX
+device /dev/sda7 mounted on /home with fstype ext3 [stats]
+( 1 ) ( 2 ) (3 ) ( 4 )
+.EE
+.in
+.IP
+The fields in each line are:
+.RS 7
+.TP 5
+(1)
+The name of the mounted device
+(or "nodevice" if there is no corresponding device).
+.TP
+(2)
+The mount point within the filesystem tree.
+.TP
+(3)
+The filesystem type.
+.TP
+(4)
+Optional statistics and configuration information.
+Currently (as at Linux 2.6.26), only NFS filesystems export
+information via this field.
+.RE
+.IP
+This file is readable only by the owner of the process.
+.SH SEE ALSO
+.BR proc (5)