Re: [RFC PATCH 14/23 V2] slub, hotplug: ignore unrelated node's hot-adding and hot-removing

On 08/03/2012 12:04 AM, Christoph Lameter wrote:

On Thu, 2 Aug 2012, Lai Jiangshan wrote:

quoted

SLUB only fucus on the nodes which has normal memory, so ignore the other
node's hot-adding and hot-removing.

You would need to do the same for SLAB. SLAB has an easier time with
falling back to other nodes (and therefore does not show up in your
tests) but as a result SLAB will be quite ineffective
because it created bogus structures that are never used yet constantly
traversed.

Because SLAB creates bogus structures, so it can care less things when in hotplug.
It is just ugly but it is not bug currently, so I want to delay to fix it.
And SLAB is not so friendly with hot-remove as SLUB in my view, we can fix it altogether in future.

Thanks,
Lai