em0 watchdog timeout

[Jack Vogel]

On Sun, Nov 13, 2011 at 10:22 AM, Willem Jan Withagen <wjw at digiware.nl>wrote:

> On 2011-11-10 23:25, Joshua Boyd wrote:
>
>> On Thu, Nov 10, 2011 at 6:51 AM, Willem Jan Withagen <wjw at digiware.nl
>> <mailto:wjw at digiware.nl>> wrote:
>>
>>    em0 at pci0:0:25:0:        class=0x020000 card=0x10bd15d9
>>    chip=0x10bd8086 rev=0x02 hdr=0x00
>>        vendor     = 'Intel Corporation'
>>        device     = 'Intel 82566DM Gigabit Ethernet Adapter (82566DM)'
>>        class      = network
>>        subclass   = ethernet
>>        bar   [10] = type Memory, range 32, base 0xdf900000, size
>>    131072, enabled
>>        bar   [14] = type Memory, range 32, base 0xdf924000, size 4096,
>>    enabled
>>        bar   [18] = type I/O Port, range 32, base 0x1820, size 32, enabled
>>        cap 01[c8] = powerspec 2  supports D0 D3  current D0
>>        cap 05[d0] = MSI supports 1 message, 64 bit enabled with 1 message
>>        cap 13[e0] = PCI Advanced Features: FLR TP
>>
>>
>>    And note that this problem only raises it nasty head very few weeks...
>>
>>
>> I have had the same problem, as shown here:
>>
>> http://lists.freebsd.org/**pipermail/freebsd-stable/2011-**
>> June/063092.html<http://lists.freebsd.org/pipermail/freebsd-stable/2011-June/063092.html>
>>
>> According to your pciconf output, your card either doesn't support
>> MSI-X, or you have MSI-X disabled.
>>
>> Check the hw.pci.enable_msix sysctl and make sure that it is set to 1.
>> Also check to make sure there aren't any BIOS settings blocking MSI-X.
>>
>> Apparently the older Intel gigabit cards don't support MSI-X, and as
>> such get starved.
>>
>
> Upgraded to a new bios, but that does not help either.
>
> Now the trick question will be:
>        IF I get a new servertype PCI-E ethernet card, would that get me
>        an MSI-X ethernet device.
>
>
There is no 'trick' to it :)  The only MSIX capable device that uses the em
driver is 82574. But if you go with igb (82575 and beyond) they are all
MSIX and multiqueue capable.

Jack