more problems with em(4)

[Michal Mertl]

Gleb Smirnoff wrote:
>   Hi, Michal!
> 
> On Tue, Mar 07, 2006 at 12:29:34PM +0100, Michal Mertl wrote:
> M> Today I've updated one machine acting as a router to RELENG_6 and I've
> M> also got several watchdog timeouts on the machine. One em card (em1)
> M> shares the IRQ with USB (as on the notebook) whereas the other doesn't.
> 
> All new interrupt handling done by Scott is solely in HEAD, nothing
> is merged to RELENG_6.

Yes I know. Some other changes got merged though.

> M> The machine didn't stop forwarding packets so it is probably a different
> M> problem that the one with wedged card, possibly completely harmless. It
> M> will be pretty bad if we shipped 6.1 with broken em(4) driver though.
> M> The first watchdog message appeared after almost 2 hours of operation
> M> (so it wasn't some stabilizing on boot or something). It has never
> M> appeared before in more than a year with 5.x (the router is only lighly
> M> loader - it pushes 1Mbps on average).
> M> 
> M> The em card in the notebook identifies itself in 'pciconf -lv' output as
> M> "82540EP Gigabit Ethernet Controller (Mobile)" whereas on the router the
> M> card is "82541EI Gigabit Ethernet Controller (Copper)".
> M> 
> M> Mar  6 21:56:26 sx-a kernel: em1: watchdog timeout -- resetting
> M> 
> M> I've changed the media settings of em0 from 100-full to auto here (em1
> M> has been set to auto and runs 1000-full all the time).
> M> Mar  7 01:35:45 sx-a kernel: em0: Link is up 100 Mbps Full Duplex
> M> 
> M> Mar  7 01:43:16 sx-a kernel: em0: watchdog timeout -- resetting
> M> Mar  7 05:33:57 sx-a kernel: em1: watchdog timeout -- resetting
> M> 
> M> Verbose dmesg available on request.
> 
> Before the latest change these line was just suppressed due to typo. So
> the card actually got timeout and was reseted, but nothing was printed.
> Please see the latest change in RELENG_6 and comments to it.

I see. I haven't probably paid enough attention to the commit message
(although I saw it) :-(.

Thank you very much for your quick response. I will sleep soundly again.

Michal