[ovs-dev,v2,1/1] docs: Add flow control on i40e issue
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Message ID 20200217113736.1541-1-tomaszx.konieczny@intel.com
State New
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  • [ovs-dev,v2,1/1] docs: Add flow control on i40e issue
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Commit Message

Konieczny, TomaszX Feb. 17, 2020, 11:37 a.m. UTC
There is an issue with flow control configuration on i40e devices
and it has a work around. We add this to documentation as known issue
until a permanent solution is developed.

Signed-off-by: Tomasz Konieczny <tomaszx.konieczny@intel.com>
---
 Documentation/intro/install/dpdk.rst | 9 +++++++++
 Documentation/topics/dpdk/phy.rst    | 2 ++
 2 files changed, 11 insertions(+)

Comments

Flavio Leitner Feb. 17, 2020, 6:07 p.m. UTC | #1
On Mon, Feb 17, 2020 at 12:37:36PM +0100, Tomasz Konieczny wrote:
> There is an issue with flow control configuration on i40e devices
> and it has a work around. We add this to documentation as known issue
> until a permanent solution is developed.
> 
> Signed-off-by: Tomasz Konieczny <tomaszx.konieczny@intel.com>
> ---

Does this apply to 2.13 as well?

LGTM
Acked-by: Flavio Leitner <fbl@sysclose.org>
Konieczny, TomaszX Feb. 18, 2020, 11:54 a.m. UTC | #2
>-----Original Message-----
>From: Flavio Leitner <fbl@sysclose.org>
>Sent: 17 February 2020 19:07
>To: Konieczny, TomaszX <tomaszx.konieczny@intel.com>
>Cc: dev@openvswitch.org
>Subject: Re: [ovs-dev] [PATCH v2 1/1] docs: Add flow control on i40e issue
>
>On Mon, Feb 17, 2020 at 12:37:36PM +0100, Tomasz Konieczny wrote:
>> There is an issue with flow control configuration on i40e devices and
>> it has a work around. We add this to documentation as known issue
>> until a permanent solution is developed.
>>
>> Signed-off-by: Tomasz Konieczny <tomaszx.konieczny@intel.com>
>> ---
>
>Does this apply to 2.13 as well?
>

Yes.

>LGTM
>Acked-by: Flavio Leitner <fbl@sysclose.org>

Regards
Tomasz Konieczny
---------------------------------------------------------------------
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Pipers Way, Swindon SN3 1RJ

Patch
diff mbox series

diff --git a/Documentation/intro/install/dpdk.rst b/Documentation/intro/install/dpdk.rst
index dbf88ec..be47a11 100644
--- a/Documentation/intro/install/dpdk.rst
+++ b/Documentation/intro/install/dpdk.rst
@@ -687,6 +687,15 @@  Limitations
   around is temporary and is expected to be removed once a method is provided
   by DPDK to query the upper bound MTU value for a given device.
 
+- Flow Control: When using i40e devices (Intel(R) 700 Series) it is recommended
+  to set Link State Change detection to interrupt mode. Otherwise it has been
+  observed that using the default polling mode, flow control changes may not be
+  applied, and flow control states will not be reflected correctly.
+  The issue is under investigation, this is a temporary work around.
+
+  For information about setting Link State Change detection, refer to
+  :ref:`lsc-detection`.
+
 Reporting Bugs
 --------------
 
diff --git a/Documentation/topics/dpdk/phy.rst b/Documentation/topics/dpdk/phy.rst
index 38e52c8..55a98e2 100644
--- a/Documentation/topics/dpdk/phy.rst
+++ b/Documentation/topics/dpdk/phy.rst
@@ -385,6 +385,8 @@  Jumbo Frames
 DPDK physical ports can be configured to use Jumbo Frames. For more
 information, refer to :doc:`jumbo-frames`.
 
+.. _lsc-detection:
+
 Link State Change (LSC) detection configuration
 -----------------------------------------------