Messages in this thread | | | Date | Fri, 27 Aug 2004 19:02:57 -0700 | From | William Lee Irwin III <> | Subject | Re: [RFC][PATCH] fix target_cpus() for summit subarch |
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On Fri, Aug 27, 2004 at 05:24:48PM -0700, john stultz wrote: > I've been hunting down a bug affecting IBM x440/x445 systems where the > floppy driver would get spurious interrupts and would not initialize > properly. > After digging James Cleverdon pointed out that target_cpus() is routing > the interrupts to the clustered apic broadcast mask. This was causing > multiple interrupts to show up, breaking the floppy init code. > This one-liner fix simply routes interrupts to the first cpu to resolve > this issue. > Any comments or feedback would be appreciated.
You're using fixed delivery mode, so non-singleton destinations break. If lowest prio delivery mode saw this, you'd have IO-APIC errata.
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