cvs commit: src/sys/dev/fxp if_fxp.c

[Kris Kennaway]

On Thu, May 15, 2003 at 06:13:17PM -0700, Robert Watson wrote:
> rwatson     2003/05/15 18:13:17 PDT
> 
>   FreeBSD src repository
> 
>   Modified files:
>     sys/dev/fxp          if_fxp.c 
>   Log:
>   Add a tunable/sysctl "hw.fxp_noflow" which disables flow control support
>   on if_fxp cards.  When flow control is enabled, if the operating system
>   doesn't acknowledge the packet buffer filling, the card will begin to
>   generate ethernet quench packets, but appears to get into a feedback
>   loop of some sort, hosing local switches.  This is a temporary workaround
>   for 5.1: the ability to configure flow control should probably be
>   exposed by some or another management interface on ethernet link layer
>   devices.

Yay!  This periodically hosed one of my 4.x boxes until I added a hack
from Peter to turn it off.  Can this be back-ported at some point?

Kris
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