From: "Mcnamara, John" <john.mcnamara@intel.com>
To: "Lu, Wenzhuo" <wenzhuo.lu@intel.com>, "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [PATCH] doc: update ixgbe doc
Date: Tue, 9 May 2017 16:38:49 +0000 [thread overview]
Message-ID: <B27915DBBA3421428155699D51E4CFE2332CA5C6@IRSMSX103.ger.corp.intel.com> (raw)
In-Reply-To: <1493790882-7009-1-git-send-email-wenzhuo.lu@intel.com>
> -----Original Message-----
> From: Lu, Wenzhuo
> Sent: Wednesday, May 3, 2017 6:55 AM
> To: dev@dpdk.org
> Cc: Mcnamara, John <john.mcnamara@intel.com>; Lu, Wenzhuo
> <wenzhuo.lu@intel.com>
> Subject: [PATCH] doc: update ixgbe doc
>
> Add more explanation about how to disable MDD on kernel PF.
>
> Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
> ---
> doc/guides/nics/ixgbe.rst | 9 ++++++---
> 1 file changed, 6 insertions(+), 3 deletions(-)
>
> diff --git a/doc/guides/nics/ixgbe.rst b/doc/guides/nics/ixgbe.rst index
> 130765b..6773fe5 100644
> --- a/doc/guides/nics/ixgbe.rst
> +++ b/doc/guides/nics/ixgbe.rst
> @@ -186,9 +186,12 @@ the advanced context descriptor should be set and set
> it. And DPDK has to ask the info about the header length from the upper
> layer, because parsing the packet itself is not acceptable. So, it's too
> expensive to support MDD.
> When using kernel PF + DPDK VF on x550, please make sure using the kernel
> -driver that disables MDD or can disable MDD. (Some kernel driver can use
> -this CLI 'insmod ixgbe.ko MDD=0,0' to disable MDD. Some kernel driver
> disables -it by default.)
> +PF driver that disables MDD or can disable MDD.
> +Some kernel driver already disables MDD by default.
> +Some kernel driver can use this CLI "insmod ixgbe.ko MDD=0,0" to disable
> MDD.
> +Every "0" in the CLI means a port. Users need to add more "0"s if the
> +machine has more ports. For example, if there're 6 ixgbe ports, the CLI
> +should be changed to "insmod ixgbe.ko MDD=0,0,0,0,0,0".
Something like this would be better:
...
When using kernel PF + DPDK VF on x550, please make sure to use a kernel
PF driver that disables MDD or can disable MDD.
Some kernel drivers already disable MDD by default while some kernels can use
the command ``insmod ixgbe.ko MDD=0,0`` to disable MDD. Each "0" in the
command refers to a port. For example, if there are 6 ixgbe ports, the command
should be changed to ``insmod ixgbe.ko MDD=0,0,0,0,0,0``.
next prev parent reply other threads:[~2017-05-09 16:38 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-03 5:54 [PATCH] doc: update ixgbe doc Wenzhuo Lu
2017-05-09 16:38 ` Mcnamara, John [this message]
2017-05-10 1:03 ` Lu, Wenzhuo
2017-05-10 1:39 ` [PATCH v2] doc: update ixgbe doc about mdd in kernel pf Wenzhuo Lu
2017-05-10 9:36 ` Mcnamara, John
2017-05-10 20:15 ` Thomas Monjalon
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