2.4.20-pre7-ac3 spurious 8259A interrupt

2.4.20-pre7-ac3 spurious 8259A interrupt

[Gabor Z. Papp]

Asus TUSL2-C mobo

ide: Assuming 33MHz system bus speed for PIO modes; override
with idebus=xx
ICH2: IDE controller at PCI slot 00:1f.1
ICH2: chipset revision 2
ICH2: not 100% native mode: will probe irqs later
    ide0: BM-DMA at 0x9800-0x9807, BIOS settings: hda:DMA, hdb:pio
    ide1: BM-DMA at 0x9808-0x980f, BIOS settings: hdc:DMA, hdd:pio

ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide1 at 0x170-0x177,0x376 on irq 15
ide2 at 0xb800-0xb807,0xb402 on irq 9
ide3 at 0xb000-0xb007,0xa802 on irq 9

# cat /proc/interrupts 
           CPU0       
  0:     185641          XT-PIC  timer
  1:       3426          XT-PIC  keyboard
  2:          0          XT-PIC  cascade
  8:          0          XT-PIC  rtc
  9:     266188          XT-PIC  ide2, ide3, eth0
 14:     229633          XT-PIC  ide0
 15:     229618          XT-PIC  ide1
NMI:          0 
ERR:          0

On heavy ide1 usage (disk present only on the primar
channel) I'm getting

	      spurious 8259A interrupt: IRQ15.

messages all the time.

Re: 2.4.20-pre7-ac3 spurious 8259A interrupt

[Allan Duncan]

You don't say what chipset the m/b uses.

I see this message once, near boot time, on a VIA KT266A,
unless I use a RedHat patched kernel.  Haven't managed to
find what they did to stop it though.

Re: 2.4.20-pre7-ac3 spurious 8259A interrupt

[Gabor Z. Papp]

* Allan Duncan <allan.d@bigpond.com>:

| You don't say what chipset the m/b uses.

Intel Corp. 82815 815 Chipset Host Bridge and Memory Controller Hub (rev 4).

| I see this message once, near boot time, on a VIA KT266A,
| unless I use a RedHat patched kernel.  Haven't managed to
| find what they did to stop it though.

I see sometimes with IRQ7 which is unused... and on heavy
ide1 usage on the ide1 interrupt. Weird, and never happend
with earlier 2.4.x kernels.