diff mbox

[dpdk-dev,2/2] doc/guides: Add hugepage reserve instructions for IBM POWER

Message ID 1491473170-25160-3-git-send-email-chaozhu@linux.vnet.ibm.com (mailing list archive)
State Accepted, archived
Delegated to: Thomas Monjalon
Headers

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/Intel-compilation success Compilation OK

Commit Message

Chao Zhu April 6, 2017, 10:06 a.m. UTC 
  This patch adds additional instructions for hugepage reservation on IBM
POWER.

Signed-off-by: Chao Zhu <chaozhu@linux.vnet.ibm.com>
---
 doc/guides/linux_gsg/sys_reqs.rst | 6 ++++++
 1 file changed, 6 insertions(+)

Comments

John McNamara April 6, 2017, 4:16 p.m. UTC | #1 
> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Chao Zhu
> Sent: Thursday, April 6, 2017 11:06 AM
> To: dev@dpdk.org
> Cc: Gowrishankar <gowrishankar.m@linux.vnet.ibm.com>; Gonzalez Monroy,
> Sergio <sergio.gonzalez.monroy@intel.com>; david.marchand@6wind.com
> Subject: [dpdk-dev] [PATCH 2/2] doc/guides: Add hugepage reserve
> instructions for IBM POWER
> 
> This patch adds additional instructions for hugepage reservation on IBM
> POWER.
> 
> Signed-off-by: Chao Zhu <chaozhu@linux.vnet.ibm.com>

Acked-by: John McNamara <john.mcnamara@intel.com>
diff mbox

Patch

diff --git a/doc/guides/linux_gsg/sys_reqs.rst b/doc/guides/linux_gsg/sys_reqs.rst
index 61222c6..3a28c9e 100644
--- a/doc/guides/linux_gsg/sys_reqs.rst
+++ b/doc/guides/linux_gsg/sys_reqs.rst
@@ -200,6 +200,12 @@  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
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^