em driver woes

From: Volcane (volcane.uk_at_gmail.com)
Date: 11/25/05

  • Next message: Dan Allen: "cvs commit: src/sys/netinet if_ether.c" 
    Date: Fri, 25 Nov 2005 21:12:04 +0000
To: freebsd-net@freebsd.org

    I scanned through the archive and noticed a posting there about an
    interrupt storm on the em driver, I am not sure if my symptoms are
    related so I decided on a new thread.

    I first installed the 6.0-RELEASE using FTP install and everything was
    happy, I then CVSUP'd to RELENG_6 which had an em driver update a few
    hours ago.

    Did the world and kernel and booted, on the boot with the new kernel I
    noticed my network was dead. I could get the initial DHCP from my
    server but once it got an IP it wasn't working.

    Further investigation with tcpdump showed me a massive amount of arp
    requests for my gateway IP, with replies coming back to the card.
    Output of 'arp -an' showed that the gateway ARP was indeed in the arp
    table so there shouldnt have been any reason for all the arp requests.

    At this point I investigated the driver version and found that the
    GENERIC from the installation media was:

    em0: <Intel(R) PRO/1000 Network Connection, Version - 2.1.7> port
    0x4000-0x403fmem 0xd8000000-0xd801ffff irq 16 at device 10.0 on pci10
    em0: Ethernet address: 00:14:85:08:60:c6
    em0: Speed:N/A Duplex:N/A

    The em from the new -STABLE kernel was:

    em0: <Intel(R) PRO/1000 Network Connection Version - 3.2.18> port
    0x4000-0x403fmem 0xd8000000-0xd801ffff irq 16 at device 10.0 on pci10
    em0: [GIANT-LOCKED]
    em0: Ethernet address: 00:14:85:08:60:c6

    Below is a diff from the config file I used to build -STABLE and the
    GENERIC config:

    < cpu I486_CPU
    < cpu I586_CPU
    25c23
    < ident GENERIC 

    ---
> ident         WEB1
36d33
< options       INET6                   # IPv6 communications protocols
64a62,72
> options         SMP                     # Symmetric MultiProcessor Kernel
> options         IPSEC
> options         IPSEC_ESP
> options         IPSEC_DEBUG
> options         IPSEC_FILTERGIF
> options         IPFIREWALL
> options         IPFIREWALL_VERBOSE
> options         IPFIREWALL_DEFAULT_TO_ACCEPT
> options         IPFIREWALL_FORWARD_EXTENDED
Hope this helps anyone, for now I'm heading back to -RELEASE
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