doc: update oldest supported kernel in Linux guide

The DPDK needs to stay up to date with current LTS Linux kernel support.
If the kernel is older than LTS it is likely to be insecure and buggy.
Therefore only require DPDK to work on oldest LTS kernel.

If distribution vendors want to support DPDK on older kernels, that is
their choice. But the upstream source does not need to be cluttered
with support for this.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
Acked-by: Marko Kovacevic <marko.kovacevic@intel.com>

diff --git a/doc/guides/linux_gsg/sys_reqs.rst b/doc/guides/linux_gsg/sys_reqs.rst
index 3e7fe63..5ff740f 100644 (file)
--- a/doc/guides/linux_gsg/sys_reqs.rst
+++ b/doc/guides/linux_gsg/sys_reqs.rst
@@ -121,7 +121,10 @@ System Software
 
 **Required:**
 
-*   Kernel version >= 2.6.34
+*   Kernel version >= 3.2
+
+    The kernel version required is based on the oldest long term stable kernel available
+    at kernel.org when the DPDK version is in development.
 
     The kernel version in use can be checked using the command::