[dpdk-dev] [dpdk-stable] [PATCH] net/vmxnet3: keep link state consistent

[Thomas Monjalon]

20/03/2018 15:12, Ferruh Yigit:
> On 3/18/2018 1:45 AM, Chas Williams wrote:
> > From: Chas Williams <chas3 at att.com>
> > 
> > The vmxnet3 never attempts link speed negotiation.  As a virtual device
> > the link speed is vague at best.  However, it is important for certain
> > applications, like bonding, to see a consistent link_status.  802.3ad
> > requires that only links of the same cost (link speed) be enslaved.
> > Keeping the link status consistent in vmxnet3 avoids races with bonding
> > enslavement.

I don't understand the issue.
Are you sure it is not an issue in bonding?

About the right value to set for virtual PMDs, I don't know, both are fakes.
I thought that AUTONEG better convey the vague link speed you describe.


> > Author: Thomas Monjalon <thomas at monjalon.net>
> > Date:   Fri Jan 5 18:38:55 2018 +0100
> > 
> > Fixes: 1e3a958f40b3 ("ethdev: fix link autonegotiation value")
> > Cc: stable at dpdk.org
> 
> There were a few more PMDs [1] they have been updated from FIXED to AUTONEG with
> above commit, do you think should we update them back to FIXED as well?
> 
> [1]
> pcap
> softnic
> vmxnet3

Yes, they all can be fixed/LINK_FIXED :) I guess