[dpdk-dev] Running DPDK as an unprivileged user

Thomas Monjalon thomas.monjalon at 6wind.com
Mon Jan 2 15:32:08 CET 2017

2016-12-29 17:14, Stephen Hemminger:
> On Thu, 29 Dec 2016 20:41:21 +0000
> "Walker, Benjamin" <benjamin.walker at intel.com> wrote:
> > My second question is whether the user should be allowed to
> > mix uio and vfio usage simultaneously. For vfio, the
> > physical addresses are really DMA addresses and are best
> > when arbitrarily chosen to appear sequential relative to
> > their virtual addresses. For uio, they are physical
> > addresses and are not chosen at all. It seems that these two
> > things are in conflict and that it will be difficult, ugly,
> > and maybe impossible to resolve the simultaneous use of
> > both.
> Unless application is running as privileged user (ie root), UIO
> is not going to work. Therefore don't worry about mixed environment.

Yes, mixing UIO and VFIO is possible only as root.
However, what is the benefit of mixing them?

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