em(4) interface hangs under 8.0-RELEASE

[Jack Vogel]

I need a bit more context Nick. Is this a card that has been non-problematic
on older releases and just showed a problem with 8.0 REL?

Regards,

Jack


On Sat, Mar 6, 2010 at 10:00 AM, Thomas Hurst <tom.hurst at clara.net> wrote:

> * Jack Vogel (jfvogel at gmail.com) wrote:
>
> > Its using MSI? Given that its PCI-X I have no idea how robust MSI is,
> > how bout you compile it with that disabled, use legacy IRQ and see
> > if that makes any diff.
>
> I'm seeing similar issues with a quad port 82546EB card, and they're not
> using MSI as far as I can tell; IRC 28-31.  MSI's are >127 or so I
> think?
>
> > Using TSO on anything pre-PCI Express is a bad idea, probably why
> > its gotten a bad rep in the em driver.
>
> Don't see TSO in ifconfig options, but will issue an ifconfig em3 -tso
> to see if it makes any difference.
>
> Interestingly I can pull 30-60MB/s to/from em0 (LAN) without any
> problems, but pulling 5MB/s from em3 has repeatedly led to the interface
> just going silent until I bounce it.  Quite intermitent though,
> sometimes it dies in the first second or two, sometimes I can pull down
> 20GB without a hitch.
>
> --
> Thomas 'Freaky' Hurst
>    http://hur.st/
>