serial8250: too much work for irq4

From: Meelis Roos
Date: Fri Jul 23 2004 - 05:41:05 EST

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

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

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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