[dpdk-dev,v2] doc: update ixgbe doc about mdd in kernel pf
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Commit Message
Add a better explanation about how to disable MDD (Malicious Driver
Detection) in a kernel PF.
Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
---
V2: fix wording.
doc/guides/nics/ixgbe.rst | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
Comments
> -----Original Message-----
> From: Lu, Wenzhuo
> Sent: Wednesday, May 10, 2017 2:40 AM
> To: dev@dpdk.org
> Cc: Mcnamara, John <john.mcnamara@intel.com>; Lu, Wenzhuo
> <wenzhuo.lu@intel.com>
> Subject: [PATCH v2] doc: update ixgbe doc about mdd in kernel pf
>
> Add a better explanation about how to disable MDD (Malicious Driver
> Detection) in a kernel PF.
>
> Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
Acked-by: John McNamara <john.mcnamara@intel.com>
10/05/2017 11:36, Mcnamara, John:
> From: Lu, Wenzhuo
> >
> > Add a better explanation about how to disable MDD (Malicious Driver
> > Detection) in a kernel PF.
> >
> > Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
>
> Acked-by: John McNamara <john.mcnamara@intel.com>
Applied, thanks
@@ -185,10 +185,13 @@ There's significant performance impact to support MDD. DPDK should check if
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.)
+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``.
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