faq: Document DPDK version maintenance.

The faq already shows the DPDK versions that were
used with each OVS version. Give information about
DPDK stable and LTS releases, so the user can understand
if those versions are maintained.

Signed-off-by: Kevin Traynor <ktraynor@redhat.com>
Signed-off-by: Ian Stokes <ian.stokes@intel.com>

diff --git a/Documentation/faq/releases.rst b/Documentation/faq/releases.rst
index db912ff39062899f977dfa39e44413ce33ce17f6..fab93b1888a6dc9b1c42c6d2b2a1d5a5b8b60ff5 100644 (file)
--- a/Documentation/faq/releases.rst
+++ b/Documentation/faq/releases.rst
@@ -168,6 +168,22 @@ Q: What DPDK version does each Open vSwitch release work with?
     2.9.x        17.11.2
     ============ =======
 
+Q: Are all the DPDK releases that OVS versions work with maintained?
+
+    No. DPDK follows YY.MM.n (Year.Month.Number) versioning.
+
+    Typically, all DPDK releases get a stable YY.MM.1 update with bugfixes 3
+    months after the YY.MM.0 release. In some cases there may also be a
+    YY.MM.2 release.
+
+    DPDK LTS releases start once a year at YY.11.0 and are maintained for
+    two years, with YY.MM.n+1 releases around every 3 months.
+
+    The latest information about DPDK stable and LTS releases can be found
+    at `DPDK stable`_.
+
+.. _DPDK stable: http://dpdk.org/doc/guides/contributing/stable.html
+
 Q: I get an error like this when I configure Open vSwitch:
 
         configure: error: Linux kernel in <dir> is version <x>, but