[dpdk-dev] [PATCH v4 10/10] doc: update ifc NIC document
Wang, Xiao W
xiao.w.wang at intel.com
Mon Dec 17 10:15:18 CET 2018
> -----Original Message-----
> From: Maxime Coquelin [mailto:maxime.coquelin at redhat.com]
> Sent: Sunday, December 16, 2018 1:36 AM
> To: Wang, Xiao W <xiao.w.wang at intel.com>; Bie, Tiwei <tiwei.bie at intel.com>
> Cc: alejandro.lucero at netronome.com; dev at dpdk.org; Wang, Zhihong
> <zhihong.wang at intel.com>; Ye, Xiaolong <xiaolong.ye at intel.com>
> Subject: Re: [PATCH v4 10/10] doc: update ifc NIC document
> On 12/14/18 10:16 PM, Xiao Wang wrote:
> > Add the SW assisted VDPA live migration feature into NIC doc.
> > Signed-off-by: Xiao Wang <xiao.w.wang at intel.com>
> > ---
> > doc/guides/nics/ifc.rst | 8 ++++++++
> > doc/guides/rel_notes/release_19_02.rst | 6 ++++++
> > 2 files changed, 14 insertions(+)
> > diff --git a/doc/guides/nics/ifc.rst b/doc/guides/nics/ifc.rst
> > index 48f9adf1d..eb55d329a 100644
> > --- a/doc/guides/nics/ifc.rst
> > +++ b/doc/guides/nics/ifc.rst
> > @@ -39,6 +39,13 @@ the driver probe a new container is created for this
> device, with this
> > container vDPA driver can program DMA remapping table with the VM's
> > region information.
> > +The device argument "swlm=1" will configure the driver into SW assisted
> > +migration mode. In this mode, the driver will set up a SW relay thread when
> > +happens, this thread will help device to log dirty pages. Thus this mode
> > +not require HW to implement a dirty page logging function block, but will
> > +consume some percentage of CPU resource depending on the network
> > +If no "swlm=1" specified, driver will rely on device's logging capability.
> > +
> Ok, so that's documented here.
> What about documenting vdpa option too?
Yes, will explain all the devargs in this doc.
> > Key IFCVF vDPA driver ops
> > ~~~~~~~~~~~~~~~~~~~~~~~~~
> > @@ -70,6 +77,7 @@ Features
> > Features of the IFCVF driver are:
> > - Compatibility with virtio 0.95 and 1.0.
> > +- SW assisted vDPA live migration.
> > Prerequisites
> > diff --git a/doc/guides/rel_notes/release_19_02.rst
> > index e86ef9511..ced6af8f0 100644
> > --- a/doc/guides/rel_notes/release_19_02.rst
> > +++ b/doc/guides/rel_notes/release_19_02.rst
> > @@ -60,6 +60,12 @@ New Features
> > * Added the handler to get firmware version string.
> > * Added support for multicast filtering.
> > +* **Added support for SW-assisted VDPA live migration.**
> > +
> > + This SW-assisted VDPA live migration facility helps VDPA devices without
> > + logging capability to perform live migration, a mediate SW relay can help
> > + devices to track dirty pages caused by DMA. IFC driver has enabled this
> > + SW-assisted live migration mode.
> > Removed Items
> > -------------
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