recent stability problems with fxp driver

[John Polstra]

On 12-Sep-2003 John Birrell wrote:
> I'm suffering what seem like different problems with the fxp driver. In RELENG_4
> the driver works well on two different embedded boards that I have. On one
> of those boards I regularly transfer ~500 MB files [via HTTP 8-)] and the
> driver appears stable.
> 
> As soon as I try to run -current on one of those boards, the kernel hangs
> in fxp's attach, just after the IRQ resource is allocated, and possibly just
> when the driver tries to reset the board. I haven't been able to debug this.
> I wonder if the device is creating an interrupt storm.
> 
> I have a hard time believing that the BIOS is behaving any differently when
> booting a RELENG_4 kernel compared to a current one. Certainly the probe
> output for fxp is the same.
> 
> When I try the same -current kernel on the other embedded board, it works.

On the board that fails, have you tried disabling ACPI in
/boot/loader.conf or at the loader prompt?  It would be interesting to
see whether that made a difference.

John