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SubjectRe: [PATCH v7 0/5] Make cpuid <-> nodeid mapping persistent
On Mon, May 23, 2016 at 03:02:14PM +0800, Zhu Guihua wrote:
> We tried to do that. You can see our patch at
> http://www.gossamer-threads.com/lists/linux/kernel/2116748
>
> But maintainer thought, we should establish persistent cpuid<->nodeid
> relationship,
> there is no need to change the map.
>
> Cc TJ,
> Could we return to workqueue to fix this?

Workqueue is just one of symptoms. We have the same problem for
memory allocation paths. It's either keeping cpu <-> node mapping
persistent or hunting down every case which may be affected and build
likely costly synchronization construct around it. It's not like we
have a lot of archs which support CPU hotplug and NUMA.

Thanks.

--
tejun

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