Hi,
I have a few of BCM5720 and BCM5719 kinds sitting in Dell R320 and R520
servers - and all of them have certain peculiarity: they claim to have
up to 4 TX and RX rings (and this can be set/verified just fine through
ethtool -l/-L, with driver defaulting to 4 rings), indirection table
(ethtool -x) looks fine as well:
RX flow hash indirection table for eth1b with 3 RX ring(s):
0: 0 1 2 3 0 1 2 3
8: 0 1 2 3 0 1 2 3
......
But this "3 RX ring(s)" is actually a real limit if I try to adjust
anything, for example all those commands would fail:
ethtool -X eth1b equal 4
ethtool -X eth1b weight 1 1 1 1
But would work fine for 3 and less rings. This was quickly tested with
different kernel/ethtool combinations, from old 3.16 to 4.6.y with same
exact results. Nothing fancier (-N/-U) is supported either.
Any hints/comments about the cause of this and/or possible workarounds ?
