[PATCH 1/2] doc: update required kernel version to 4.9

[Stephen Hemminger <stephen@networkplumber.org>]

The 4.4 kernel has passed its end of life date (after 6 years).
It is no longer supported and therefore DPDK should update
its minimum required kernel version.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 doc/guides/linux_gsg/sys_reqs.rst | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/doc/guides/linux_gsg/sys_reqs.rst b/doc/guides/linux_gsg/sys_reqs.rst
index d95a78d1561d..1d2390590ce8 100644
--- a/doc/guides/linux_gsg/sys_reqs.rst
+++ b/doc/guides/linux_gsg/sys_reqs.rst
@@ -121,9 +121,10 @@ System Software
 
 **Required:**
 
-*   Kernel version >= 4.4
+*   Kernel version >= 4.9
 
-    The kernel version required is based on the oldest long term stable kernel available
+    The kernel version required is based on the oldest long term stable
+    kernel (that has not reached end of life)
     at kernel.org when the DPDK version is in development.
     Compatibility for recent distribution kernels will be kept, notably RHEL/CentOS 7.
 
-- 
2.34.1