[PATCH] net/vmxnet3: Don't enable rx queue interrupts on FreeBSD

[Tom Jones]

On Thu, Mar 21, 2024, at 10:15, David Marchand wrote:
> Hello Tom,
>
> On Thu, Mar 21, 2024 at 11:00 AM Tom Jones <thj at freebsd.org> wrote:
>>
>> Commit 29a1c9107bb disabled interrupts on FreeBSD for the vmxnet3 driver
>> as they are not supported. Rx queue interrupts were missed by this
>> change, don't attempt to enable them on FreeBSD.
>>
>> Without this change applications enabling interrupts encounter an
>> immediate abort on FreeBSD.
>
> Thanks for the patch, you will probably want this fix backported in
> LTS versions.
> If so, please add a Fixes: tag and Cc: stable at dpdk.org.
> I guess here, it is:
> Fixes: 40d5676ff1ea ("net/vmxnet3: fix initialization on FreeBSD")

Thanks! updated

>
> Reading again the commitlog, I wonder if we should error out in
> vmxnet3_configure_msix() if rx (and/or lsc) interrupts are requested
> for FreeBSD.
> Did you consider this approach?
>

I haven't dug much futher into this. I also changed the application side (vpp) to not request interrupts. I think there are probably some other FreeBSD specific cases to explore in vmxnet3, but I don't have a great environment for testing yet.

- Tom