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SubjectRe: [2.6.20][PATCH] fix mempolicy error check on a system with memory-less-node

> AFAIK, ia64 creates nodes just depends on SRAT's possible resource information.
> Then, ia64 can create cpu-memory-less-node(node with no available resource.).
> (*)I don't like this.
> If we don't allow memory-less-node, we may have to add several codes for cpu-hot-add.
> cpus should be moved to nearby node at hotadd .
> And node-hot-add have to care that cpus mustn't be added before memory, cpu-driven
> node-hot-add will never occur. (ACPI's 'container' device spec can't guaranntee this.)

You can also alias node numbers to solve this: just point multiple node numbers
to the same pgdat. For a memory less node this would be a nearby one.


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