Messages in this thread | | | Date | Thu, 4 Dec 2003 16:05:28 -0700 | From | Jesse Allen <> | Subject | Re: NForce2 pseudoscience stability testing (2.6.0-test11) - IRQ flood related ? |
| |
On Thu, Dec 04, 2003 at 09:02:08PM +0100, cheuche+lkml@free.fr wrote: > Hello, > > Along with the lockups already described here, I've noticed an > unidentified source of interrupts on IRQ7. ... > I wonder if people experiencing lockup problems also have these > noise interrupts,
I just took a look at this, by setting up parport_pc, and yes I get noise.
This was my first sample with a kernel with APIC: 7: 29230 IO-APIC-edge parport0
Then I took a look again about 5 seconds later: 7: 41560 IO-APIC-edge parport0
And I looked again, and it was higher. If you take a look repeatally, you see it increases for 2-3 seconds, then stops for 2-3, then starts increasing again and continues like this. This is pretty much an idle system other than me cat'ing. I'm not using the parallel port at all.
Then I looked at the irq with parport_pc setup and with a kernel with APIC all disabled: 7: 0 XT-PIC parport0
And it is the same on repeated cat's.
These kernels are exactly the same except ones compiled with UP APIC and the other isn't. I don't know how parport works, but seeing two different events under this condition does seem suspicious.
> and I don't know if this has something to do with the > lockups or if it is an independant problem. >
I have no idea, but it is suspicious, as I get lockups and this noise with the APIC enabled kernel.
Jesse - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |