From 07d16cc0985d9c43ee6f8bb50d793491f540f2c9 Mon Sep 17 00:00:00 2001
From: Michal Sekletar <msekleta@redhat.com>
Date: Mon, 21 Jan 2019 23:05:46 +0100
Subject: [PATCH] man: document db_persist udev rules OPTION

Fixes #1551
---
 man/udev.xml | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/man/udev.xml b/man/udev.xml
index 08fedfc86cf..74aab8e024f 100644
--- a/man/udev.xml
+++ b/man/udev.xml
@@ -566,6 +566,18 @@
                   <para>Disable the watching of a device node with inotify.</para>
                 </listitem>
               </varlistentry>
+              <varlistentry>
+                <term><option>db_persist</option></term>
+                <listitem>
+                  <para>Set the flag (sticky bit) on the udev database entry
+                  of the event device. Device properties are then kept in the
+                  database even when
+                  <command>udevadm info --cleanup-db</command> is called.
+                  This option can be useful in certain cases
+                  (e.g. Device Mapper devices) for persisting device state
+                  on the transition from initramfs.</para>
+                </listitem>
+              </varlistentry>
             </variablelist>
           </listitem>
         </varlistentry>
-- 
2.47.3