Re: [patch 11/21] (NEW) more aggressively use lumpy reclaim

KOSAKI Motohiro
2008-03-02T10:36:20Z

Hi

I think this patch is very good improvement.
but it is not related to split lru.

Why don't you separate this patch?
IMHO treat as independent patch is better.

Thanks.

> During an AIM7 run on a 16GB system, fork started failing around
> 32000 threads, despite the system having plenty of free swap and
> 15GB of pageable memory.
>
> If normal pageout does not result in contiguous free pages for
> kernel stacks, fall back to lumpy reclaim instead of failing fork
> or doing excessive pageout IO.
>
> I do not know whether this change is needed due to the extreme
> stress test or because the inactive list is a smaller fraction
> of system memory on huge systems.