Re: [PATCH net-next 2/2] net: dsa: mv88e6xxx: use direct ATU hash on 88E6141/6341

[Luke Howard]

> On 4 Jul 2026, at 7:43 am, Andrew Lunn <andrew@xxxxxxx> wrote:
> 
>> No documentation, just my experience, which is why I asked in the
>> cover for others to test. I can include test results with the next
>> revision.
> 
> Not so much the test results, but the test case.
> 
> The reason i added the devlink option was because the network
> contained only devices from one vendor. So the OUI in the MAC
> addresses was the same, the usable number of bits in the MAC address
> being cut in half, in the best case. As a result, there was a lot of
> hash collisions. For this special case network, the test mode hash was
> better.
> 
> If you are also seeing a lot of collisions, it makes me wounder what
> your distribution of MAC addresses is.

Well, a bunch of unicast addresses along with MAAP for AVB.

But what triggered it was multiple FIDs (VLAN-aware bridge), which wouldn’t have been visible without the first patch to configure the ATU FID register correctly.

Luke