While developing a devc driver, I encountered a little intermittent problem
with devc-ser8250 on 6.20A PE SMP(Dual 1.8 GHz Xeons, 512MB, 3COM 3C905C
NIC)
I am trying to develop a character driver for a multi-port VME Bus serial
board (NEC 7201 DUART) and have written a small test application which
simply writes a string out one serial port of the VME serial card and is
received on COM1 on a different computer. The VME based computer (PIII850
256 MB) running my devc driver (devc-mz8300) and the Dual Xeon box is simply
running devc-ser8250. Serial ports on both boxes set to 9600,N,8,1 raw with
no hardware/software handshaking (this is due to legacy configurations of
the VME serial board already being used in the field).
The problem I am seeing is that the Dual Xeon box stops
transmitting.receiving data after some random amount of time (anywhere from
5 minutes to several hours) and all network connections are lost (I have to
slay/restart io-net to access the network).
I have tried using the non-SMP kernel which only extends the amount of time
which passes before the problem occurs. I have disabled hyper-threading both
with and without the SMP kernel which seems to have a similar effect as
using the non-SMP kernel (more time passes before problem occurs).
I have attached the output from ‘pci -v’. Any ideas are greatly appreciated.
TIA
Brian
begin 666 pci.txt
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`
end
). Would it be a problem if they did share the
- it is occurring on a standard Intel PC talking on COM1 (IRQ