X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=doc%2Fguides%2Flinux_gsg%2Fsys_reqs.rst;h=eb8442c622260e9889923302ffdc7bc5e83ba9ef;hb=f6fadc3e6310;hp=61222c699b7d57f8d22781875e741fd3289c25f7;hpb=d76a592782c1291b19f74a8ec29bcbd40b5170cd;p=dpdk.git

diff --git a/doc/guides/linux_gsg/sys_reqs.rst b/doc/guides/linux_gsg/sys_reqs.rst
index 61222c699b..eb8442c622 100644
--- a/doc/guides/linux_gsg/sys_reqs.rst
+++ b/doc/guides/linux_gsg/sys_reqs.rst
@@ -43,14 +43,21 @@ BIOS Setting Prerequisite on x86
 
 For the majority of platforms, no special BIOS settings are needed to use basic DPDK functionality.
 However, for additional HPET timer and power management functionality,
-and high performance of small packets on 40G NIC, BIOS setting changes may be needed.
+and high performance of small packets, BIOS setting changes may be needed.
 Consult the section on :ref:`Enabling Additional Functionality <Enabling_Additional_Functionality>`
 for more information on the required changes.
 
+.. note::
+
+   If UEFI secure boot is enabled, the Linux kernel may disallow the use of
+   UIO on the system. Therefore, devices for use by DPDK should be bound to the
+   ``vfio-pci`` kernel module rather than ``igb_uio`` or ``uio_pci_generic``.
+   For more details see :ref:`linux_gsg_binding_kernel`.
+
 Compilation of the DPDK
 -----------------------
 
-**Required Tools:**
+**Required Tools and Libraries:**
 
 .. note::
 
@@ -84,6 +91,8 @@ Compilation of the DPDK
        x86_x32 ABI is currently supported with distribution packages only on Ubuntu
        higher than 13.10 or recent Debian distribution. The only supported  compiler is gcc 4.9+.
 
+*   libnuma-devel - library for handling NUMA (Non Uniform Memory Access).
+
 *   Python, version 2.7+ or 3.2+, to use various helper scripts included in the DPDK package.
 
 
@@ -129,8 +138,6 @@ System Software
 
     For other kernel builds, options which should be enabled for DPDK include:
 
-    *   UIO support
-
     *   HUGETLBFS
 
     *   PROC_PAGE_MONITOR  support
@@ -200,6 +207,12 @@ On a NUMA machine, pages should be allocated explicitly on separate nodes::
 
     For 1G pages, it is not possible to reserve the hugepage memory after the system has booted.
 
+    On IBM POWER system, the nr_overcommit_hugepages should be set to the same value as nr_hugepages.
+    For example, if the required page number is 128, the following commands are used::
+
+        echo 128 > /sys/kernel/mm/hugepages/hugepages-16384kB/nr_hugepages
+        echo 128 > /sys/kernel/mm/hugepages/hugepages-16384kB/nr_overcommit_hugepages
+
 Using Hugepages with the DPDK
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^