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FromMichael Frank <>
Subject2.4.21-rc7 hang on boot after spurious 8259A interrupt: IRQ15.
DateFri, 13 Jun 2003 11:36:36 +0800
Doing swsusp testing in endless loop. On a P4/2.4G (ACPI=off)
on 192nd boot:

spurious 8259A interrupt: IRQ15.
Calibrating delay loop... 

 hang

Hit Reset and it rebooted OK

This is the first spurious 8259A interrupt: IRQ15 seen.

I see spurious 8259A interrupt: IRQ7 quite frequently on
varying hardware on both 2.4 and 2.5.

By design, the 8259A delivers a vector 7 when the IRQ
line is deasserted before the IRQ is serviced. This
applies to both edge and level trigger modes. A floating
"wire" or crapy chipset can pickup noise, but the driver 
should handle it.  

No problems seen with mainboard/cpu/ram in three months. 
I dont' think it is HW, but it could be.  

Also, spurious 8259A interrupts are quite recent, could 
something be wrong with recent 8259A driver?

Regards
Michael

I am not subscribed, pls cc me

-- 
Powered by linux-2.5.70-mm3, compiled with gcc-2.95-3

My current linux related activities in rough order of priority:
- Testing of 2.4/2.5 kernel interactivity
- Testing of Swsusp for 2.4
- Testing of Opera 7.11 emphasizing interactivity
- Research of NFS i/o errors during transfer 2.4>2.5
- Learning 2.5 series kernel debugging with kgdb - it's in the -mm tree
- Studying 2.5 series serial and ide drivers, ACPI, S3
* Input and feedback is always welcome *


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