Wed, Apr 11, 2018 at 01:28:51AM CEST, m...@redhat.com wrote:
>On Tue, Apr 10, 2018 at 02:26:08PM -0700, Stephen Hemminger wrote:
>> On Tue, 10 Apr 2018 11:59:50 -0700
>> Sridhar Samudrala <sridhar.samudr...@intel.com> wrote:
>> 
>> > Use the registration/notification framework supported by the generic
>> > bypass infrastructure.
>> > 
>> > Signed-off-by: Sridhar Samudrala <sridhar.samudr...@intel.com>
>> > ---
>> 
>> Thanks for doing this.  Your current version has couple show stopper
>> issues.
>> 
>> First, the slave device is instantly taking over the slave.
>> This doesn't allow udev/systemd to do its device rename of the slave
>> device. Netvsc uses a delayed work to workaround this.
>
>Interesting. Does this mean udev must act within a specific time window
>then?

Yeah. That is scarry. Also, wrong.


>
>> Secondly, the select queue needs to call queue selection in VF.
>> The bonding/teaming logic doesn't work well for UDP flows.
>> Commit b3bf5666a510 ("hv_netvsc: defer queue selection to VF")
>> fixed this performance problem.
>> 
>> Lastly, more indirection is bad in current climate.
>> 
>> I am not completely adverse to this but it needs to be fast, simple
>> and completely transparent.
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