An 'ifconfig ix0 mtu 1500' works fine, but 'ifconfig ix0 mtu 1501'
causes a panic. It was either a "RX ring hdr initialization failed!"
or a "RX ring pkt initialization failed!" (sorry, I did not write it
down because I thought it would be in the logs).
This is with a 8-STABLE cvsup'd yesterday:
FreeBSD XXXXXXX 8.1-PRERELEASE FreeBSD 8.1-PRERELEASE #4: Sun May 23
17:23:39 CEST 2010 r...@xxxxx:/usr/obj/usr/src/sys/GENERIC amd64
ix0: <Intel(R) PRO/10GbE PCI-Express Network Driver, Version - 2.1.7>
port 0xece0-0xecff mem 0xdf1a0000-0xdf1bffff,0xdf1c0000-0xdf1fffff,
0xdf19c000-0xdf19ffff irq 34 at device 0.0 on pci5
ix0: Using MSIX interrupts with 9 vectors
ix0: [ITHREAD]
ix0: [ITHREAD]
ix0: [ITHREAD]
ix0: [ITHREAD]
ix0: [ITHREAD]
ix0: [ITHREAD]
ix0: [ITHREAD]
ix0: [ITHREAD]
ix0: [ITHREAD]
ix0: Ethernet address: 00:1b:21:49:56:61
ix0: PCI Express Bus: Speed 2.5Gb/s Width x8
ix0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=5bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,LRO>
ether 00:1b:21:49:56:61
inet 10.0.1.1 netmask 0xffffff00 broadcast 10.0.1.255
media: Ethernet autoselect (10Gbase-SR <full-duplex>)
status: active
rvdp
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