On Wed, 2006-07-26 at 00:18 +0200, Andi Kleen wrote:
> > MSI Master2-FAR with VIA K8T800, kernel-2.6.17-1.2157_FC5
>
> Thanks.
>
> > With any luck, this APIC rework will fix this board's habit of
> > spontaneously turning off interrupts at the IOAPIC level without the
> > kernel's knowledge.
>
> Unlikely unfortunately. How does it look like when they get turned off?
>
I stop getting any interrupts from the device in question (either the
on-board UHCI controllers or the on-board SATA controller) -- i.e. mouse
movement gets jerky because uhci-hcd is operating purely by polling or I
start getting libata timeouts in my logs.
I have an abomination of a systemtap script which calls
unmask_IO_APIC_irq directly which instantly "fixes" it when things go
wrong.
I also have another stap script which records stack traces when
mask_IO_APIC_irq and unmask_IO_APIC_irq called in order to check if the
IRQs are actually getting turned off without the kernel's knowledge, but
when I run that in the background, the problem doesn't ever manifest
itself.
--
Nicholas Miell <[email protected]>
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