Re: [RFC][PATCH] IO-APIC blacklist

From: Len Brown
Date: Sat Jun 02 2007 - 19:34:12 EST


> -uhci_hcd 0000:00:1f.2: irq 19, io base 0x0000ff80 # slow
> +uhci_hcd 0000:00:1f.2: irq 17, io base 0x0000ff80 # fine

nope, this function is on on hardware IRQ 19 in both cases.

it just looks like IRQ 17 in the ACPI case due to this:

ACPI: PCI Interrupt 0000:00:1f.2[D] -> GSI 19 (level, low) -> IRQ 17

Totally bogus? Yes.
google "Kill IRQ compression"
But while I truly hate this particular hack and I've wanted it gone for a long time,
it doesn't appear to be related to the failure at hand -- it just makes
it more irritating to debug.

-Len
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