freebsd stable - Apr 2015 - 10.1-STABLE bce: Watchdog timeout occurred

On 04/21/2015 06:17 AM, Chris Ross wrote:
>    I got a new [to me] system recently, a Dell PE 1950.  It has two bce
parts on the motherboard that identify as:
>
> bce#: <QLogic NetXtreme II BCM5708 1000Base-T (B2)>
>
>    The OS I installed and kernel I'm running are from a download of a
10.1 STABLE ISO, r281235, April 7, 2015.
>
>    I had gone on to check out a newer stable from subversion, and build a
custom kernel, but when I booted that one I got a bce0 that didn't seem to
work, and kept emitting:
>
> bce0: /usr/src/sys/dev/bce/if_bce.c(7869): Watchdog timeout occurred,
resetting!
> bce0: link state changed to DOWN
> bce0: link state changed to UP
>
>    So, I fell back.  But I've since noticed that even the original
kernel seems to do this after booting.  I'm not yet running any notable
amount of traffic through the system, but intend to make it an edge router, so
certainly will be.
>
>    Is there any sort of issue noted in the bce driver in recent
days/weeks/months?  Are other folks seeing this diagnostic/error?
>
>    I'll do a little more testing and see if I'm seeing it more or
less often, but I know that in at least some cases the interface has flapped
like this after boot for long enough that I was unable to get connected
remotely, and resorted to a console login to reboot.
>
>                                                  - Chris
>
There are "Watchdog timeout" errors with some msk NICs. Both msk and
bce
are dependent on MII bus code (see /usr/src/sys/amd64/conf/GENERIC)

-Alnis

This may be caused by DMA alignment problems.
See 
https://docs.freebsd.org/cgi/getmsg.cgi?fetch=145859+0+archive/2015/freebsd-stable/20150419.freebsd-stable
for a recent thread about the msk driver.  The msk maintainer Yonghyeon 
Pyun has opted for super safe options of 32K alignment!

It's a long shot, but you could try increasing BCE_DMA_ALIGN and/or 
BCE_RX_BUF_ALIGN in the include file if_bcereg.h, say up to 4096, to see 
whether it makes any difference.

- Gareth.

On 21/04/2015 10:52, Alnis Morics wrote:
> On 04/21/2015 06:17 AM, Chris Ross wrote:
>>    I got a new [to me] system recently, a Dell PE 1950.  It has two 
>> bce parts on the motherboard that identify as:
>>
>> bce#: <QLogic NetXtreme II BCM5708 1000Base-T (B2)>
>>
>>    The OS I installed and kernel I'm running are from a download of
a
>> 10.1 STABLE ISO, r281235, April 7, 2015.
>>
>>    I had gone on to check out a newer stable from subversion, and 
>> build a custom kernel, but when I booted that one I got a bce0 that 
>> didn't seem to work, and kept emitting:
>>
>> bce0: /usr/src/sys/dev/bce/if_bce.c(7869): Watchdog timeout occurred, 
>> resetting!
>> bce0: link state changed to DOWN
>> bce0: link state changed to UP
>>
>>    So, I fell back.  But I've since noticed that even the original 
>> kernel seems to do this after booting.  I'm not yet running any 
>> notable amount of traffic through the system, but intend to make it 
>> an edge router, so certainly will be.
>>
>>    Is there any sort of issue noted in the bce driver in recent 
>> days/weeks/months?  Are other folks seeing this diagnostic/error?
>>
>>    I'll do a little more testing and see if I'm seeing it more
or
>> less often, but I know that in at least some cases the interface has 
>> flapped like this after boot for long enough that I was unable to get 
>> connected remotely, and resorted to a console login to reboot.
>>
>>                                                  - Chris
>>
> There are "Watchdog timeout" errors with some msk NICs. Both msk
and
> bce are dependent on MII bus code (see /usr/src/sys/amd64/conf/GENERIC)
>
> -Alnis
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