Re: New commands to configure IOV features

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On 07/16/2012 05:19 AM, Yuval Mintz wrote:

If I want to pick the RFCs and add support for configuring the number
of VFs - do you think ethtool's the right place for such added
support?

I think a PCI utility tool would be better, SR-IOV is not limited to
network devices.  That's one of the reasons I dropped the RFC.  I
haven't gotten back to the idea since then due to my day job keeping me
pretty busy.

For what it's worth, I agree with this.

 From my perspective it would be ideal if this could be exported via /sys or something



Well, obviously unless there was a sudden change in our stance regarding
sysfs we will not head that way.

This thread got no replies from the pci community, and I'm unfamiliar
with such a tool.

Dave, What's your stance in the matter - do you wish us to continue pursuing
some pci tool (which might or might not exist), or instead work on
a networking solution to this issue?

Do you happen to know such a tool?

Thanks,
Yuval

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Yuval (et. al.),

Not seeing the original thread on netdev,
I just had a recent discussion w/Greg Rose about providing
sysfs-based, VF enable/disable methods.
I was told that historically, VF enablement started as a sysfs-based
function, was debated and pushed toward a device/driver-specific method,
as it is implemented today.   Now, with some experience with SRIOV and
its use in the virtualization space, the discussion has renewed as to whether
a sysfs-based enable/disable method should be resurrected, so it
provides a more generic method for virtualization tools/api's to
manage SRIOV/VF devices.

I was hoping to discuss this topic with a number of folks at
LinuxCon/Plumbers/KS when the PCI mini-summit is held, to gain
further insight, or be brought up to speed on past history,
and review current uses/status of VFs.

WRT SRIOV-nic devices, the thinking goes that protocol-level
parameters associated with VFs should use protocol-specific interfaces,
e.g., ethtool, ip link set, etc. for Ethernet VFs.
Thus, the various protocol control functions/tools should
be used to control VF parameters, as one would for a physical device
of that protocol/class.

- Don
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