serial8250: too much work for irq4

[Meelis Roos]

Often when I use my PC (Celeron 900 with i815 chipset) as a serial
console for pther computers (mostly Suns), I get dmesg full of lines

serial8250: too much work for irq4

This might or might not be the cause of garbled output from the Sun -
many characters are dropped.

I turned off PREEMPT and 4KSTACKS and recompiled, this doesn't change
anything.

Load is normal desktop use, sometimes background compilations. IDE disk
is in DMA mode.

           CPU0
  0:   62787447          XT-PIC  timer
  1:       1474          XT-PIC  i8042
  2:          0          XT-PIC  cascade
  7:        631          XT-PIC  parport0
  8:          4          XT-PIC  rtc
  9:          0          XT-PIC  acpi, Intel 82801BA-ICH2, tr1
 10:       5251          XT-PIC  uhci_hcd
 11:    5455136          XT-PIC  uhci_hcd, eth0, r128@PCI:3:0:0
 14:     382770          XT-PIC  ide0
 15:         68          XT-PIC  ide1
NMI:       4322
LOC:   62795747
ERR:         74
MIS:          0


-- 
Meelis Roos (mroos@xxxxxxxx)

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