Messages in this thread | | | Date | Mon, 17 Jun 2002 11:34:33 +0200 (SAST) | From | Zwane Mwaikambo <> | Subject | Re: [patch] 2.4.19-pre10-ac2: O(1) scheduler merge, -A3. |
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<Martin Bligh added to CC>
On Mon, 17 Jun 2002, Ingo Molnar wrote:
> irqbalance uses the set_ioapic_affinity() method to set affinity. The > clustered APIC code is broken if it doesnt handle this properly. (i dont > have such hardware so i cant tell, but it indeed doesnt appear to handle > this case properly.) By wrapping around at node boundary the irqbalance > code will work just fine.
I agree, Also we have to be careful about the usage of cpu_online_map in balance_irq, there might need to be a bit of reworking of some of the other parts to get this working e.g. being able to determine which node a specific IOAPIC register is on (perhaps there might be 1 or 2 IOAPICs / node) etc etc. Martin?
> i agree that this could be a problem, but set_ioapic_affinity() can be > made dependent on the actual NUMA setup that is used. This is absolutely > needed anyway for a proper /proc/irq/*/smp_affinity feature.
Agreed.
Thanks, Zwane -- http://function.linuxpower.ca
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