[ovs-dev] [PATCH v3] INSTALL.md: Add details about kernel module preference.
Gurucharan Shetty
guru at ovn.org
Tue Sep 27 05:15:54 UTC 2016
Signed-off-by: Gurucharan Shetty <guru at ovn.org>
---
INSTALL.md | 23 ++++++++++++++++++++++-
1 file changed, 22 insertions(+), 1 deletion(-)
diff --git a/INSTALL.md b/INSTALL.md
index bb40e4a..a073465 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -322,9 +322,30 @@ Building the Sources
4. Run "make install" to install the executables and manpages into the
running system, by default under /usr/local.
-5. If you built kernel modules, you may install and load them, e.g.:
+5. If you built kernel modules, you may install them, e.g.:
`% make modules_install`
+
+ It is possible that you already had a Open vSwitch kernel module
+ installed on your machine that came from upstream Linux (in a
+ different directory). To make sure that you insert the Open vSwitch
+ kernel module you built from this repository, you should create a
+ depmod.d file that prefers your newly installed kernel modules over
+ the kernel modules from upstream Linux. The following snippet of
+ code achieves the same.
+
+ ```
+ % config_file="/etc/depmod.d/openvswitch.conf"
+ % for module in datapath/linux/*.ko; do
+ modname="$(basename ${module})"
+ echo "override ${modname%.ko} * extra" >> "$config_file"
+ echo "override ${modname%.ko} * weak-updates" >> "$config_file"
+ done
+ % depmod -a
+ ```
+
+ Finally, load the kernel modules that you need. e.g.:
+
`% /sbin/modprobe openvswitch`
To verify that the modules have been loaded, run "/sbin/lsmod" and
--
1.9.1
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