PING: Someone on the core team. (Modem Problem)

[Daniel Rudy]

At about the time of 2/13/2007 10:24 PM, M. Warner Losh stated the
following:
> In message: <45D2A48F.1010104 at pacbell.net>
>             Daniel Rudy <dr2867 at pacbell.net> writes:
> : At about the time of 2/12/2007 10:49 PM, M. Warner Losh stated the
> : following:
> : > : sio0: configured irq 19 not in bitmap of probed irqs 0
> : > : sio0: port may not be enabled
> : > 
> : > This may be your problem.  sio isn't detecting the interrupts
> : > happening on this card, it seems, from this dmesg.  You may need to
> : > use John Baldwin's hacks to force sio to not use fast interrupts.
> : > This makes it possible to share it with non-fast interrupt sources.
> : > Please let me know if you need these patches. 
> : 
> : I'm working on changing the hardware around and moving the modem to a
> : different PCI slot to see if that makes a difference.  The system is
> : reinstalling right now on the machine (I tried to install Linux but it
> : failed...miserably).
> 
> OK.  Please let me know if you need any additional help.  Are the sis
> cards add-in cards, or on the motherboard?
> 
> Warner
> 

Changing the slot did help.  I moved it from slot 3 to slot 1.  But, now
it's dropping characters with a port speed of 57600, and I am also
getting irq overrun errors from the kernel too now.  This is actually
much better than I had before.  With a port speed of 2400, I do not drop
characters.

Here's the message that I got:

sio4: 2374 more interrupt-level buffer overflows (total 2374)


test# vmstat -i
interrupt                          total       rate
irq1: atkbd0                           6          0
irq6: fdc0                            10          0
irq14: ata0                         1120          1
irq15: ata1                           47          0
irq17: sio4                          415          0
irq19: sis0 sis2                     970          1
cpu0: timer                      1764263       1998
Total                            1766831       2000
test#


>From what I can tell, PCI slot 3 and sis0 on the mainboard are both tied
to irq 19, which probably was the whole problem.  But now I'm having an
irq latency problem.  This is progressing well though.

-- 
Daniel Rudy