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From a4f12d4849daed23651ab3c23b5ff830aa32b2a0 Mon Sep 17 00:00:00 2001
From: Michal Sekletar <msekleta@redhat.com>
Date: Wed, 3 Feb 2016 10:38:29 +0100
Subject: [PATCH] man: clarify what happens when journalctl is called with
devpath
Cherry-picked from: 3cea8e06e45fc1757de8f74da29fb5fb181db4eb
Related: #947636
---
man/journalctl.xml | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/man/journalctl.xml b/man/journalctl.xml
index 2764f66ed..0981fba72 100644
--- a/man/journalctl.xml
+++ b/man/journalctl.xml
@@ -91,8 +91,14 @@
paths may be specified. If a file path refers to an executable
file, this is equivalent to an <literal>_EXE=</literal> match
for the canonicalized binary path. Similarly, if a path refers
- to a device node, this is equivalent to a
- <literal>_KERNEL_DEVICE=</literal> match for the device.</para>
+ to a device node then match is added for the kernel name of the
+ device (<literal>_KERNEL_DEVICE=</literal>). Also, matches for the
+ kernel names of all the parent devices are added automatically.
+ Device node paths are not stable across reboots, therefore match
+ for the current boot id (<literal>_BOOT_ID=</literal>) is
+ always added as well. Note that only the log entries for
+ the existing device nodes maybe queried by providing path to
+ the device node.</para>
<para>Additional constraints may be added using options
<option>--boot</option>, <option>--unit=</option>, etc, to