Re: SMP IRQ management issues in 2.4.x

Alan Cox (alan@lxorguk.ukuu.org.uk)
Thu, 21 Mar 2002 14:31:36 +0000 (GMT)


> After changing from 2.2.18 to 2.4.17 recently, I noticed that after booting
> 2.4 my interrupts were routed a lot less effectively than under 2.2

Can you post both 2.2 and 2.4 tables for comparison

> Needless to say that Harddrives connected to ide2 and ide3 (Promise)
> constantly lose interrupts when used as long as X is running (nvidia),
> bringing the system to crawl.

You should never be losing interrupts, even with everything on one IRQ line.
PCI interrupts are level trigger so don't get "lost" in the same way as ISA
ones did
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