On 30-Jul-20 5:54 PM, Owen Hilyard wrote:
Thanks for the advice.
I was wondering about the state of the "Setup VFIO permissions" option
in the setup script. It seems to just modify the character device's
permissions and then check their memory limit. Should this option also
handle the hugepages setup?
I was under the (mis?)impression that the hugepage setup part of the
script did that?
Thanks
On Wed, Jul 29, 2020 at 11:35 AM Burakov, Anatoly
<anatoly.bura...@intel.com <mailto:anatoly.bura...@intel.com>> wrote:
On 29-Jul-20 3:34 PM, Owen Hilyard wrote:
> Hello all,
>
> I was wondering what everyone's thoughts on doing both userspace
testing
> and unprivileged testing of dpdk applications is. DTS currently
runs all
> commands on the tester and the dut as the root user. Please
correct me if
> I'm wrong, but I was under the assumption that most applications
written
> with dpdk would not run as root. This could present a problem
since it is
> possible that permissions errors could arise and we wouldn't
notice it due
> to the way we currently test. Given that, I was wondering what
should and
> should not be possible as a normal (non-root) user, and what
would be the
> best way to go about verifying this.
>
> Thanks
>
This is useful, but not everything is supposed to work with limited
privileges. Things that definitely *won't* work are KNI and anything
igb_uio-related. Everything VFIO should work fine, and setting up
correct permissions for hugepages and VFIO is one of the trickier
things
that even I don't know how to do correctly off the top of my head :D
An easy stopgap way of running almost everything as an unprivileged
user
is to use in-memory mode (--in-memory EAL switch); this will cause EAL
to reserve hugepages etc. without touching the filesystem, sacrificing
secondary process support in the process (so e.g. EAL autotest won't
work in --in-memory mode as it relies on secondary process support).
So, i would say that it would be a valuable thing to test for, but be
aware that not everything is expected to work.
--
Thanks,
Anatoly
--
Thanks,
Anatoly
