Messages in this thread | | | From | (Joe Korty) | Subject | Re: [RFC][PATCH] irq0 affinity broke on some i386 boxes | Date | Fri, 1 Mar 2002 14:51:49 -0500 (EST) |
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> On Mon, 25 Feb 2002, Joe Korty wrote: > >> The following patch fixes a bug that prevents a write to >> /proc/irq/0/smp_affinity from actually changing the cpu affinity >> of IRQ #0, on all the (Dell server) SMP machines I have access to. > > A nice spotting. However what you describe is only a side effect of the > bug, which is the IRQ is kept registered at the wrong pin. It's only > because the timer is special and it's edge-triggered it remained unnoticed > for so long. > > I propose the following patch. [...] > > I don't know if the changes are relevant to your system as you haven't > sent the relevant fragment of a bootstrap log from your system. They > affect all systems that have a bogus IRQ 0 entry in the MP table. For > other systems the patch is equivalent to yours. Please test it if it > works for you as I don't have a suitable system with IRQ 0 unconnected > (I've been able to verify it builds only). Everyone with such a system is > invited to test the patch as well.
Thanks. Your proposed patch works fine on the two of my five SMP systems I have been able to get my hands on this afternoon.
Joe
PS: My original dmesg logs may now be found at http://www.mindspring.com/~jakorty/irq0.bugreport.orig. - 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/
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