> -----Original Message----- > From: Lu, Wenzhuo > Sent: Wednesday, May 3, 2017 6:55 AM > To: dev@dpdk.org > Cc: Mcnamara, John <john.mcnam...@intel.com>; Lu, Wenzhuo > <wenzhuo...@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...@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``.
