Re: new OOM heuristic failure (was: Re: VM: qsbench)

[Linus Torvalds]

On Fri, 2 Nov 2001, Stephan von Krawczynski wrote:
>
> To clarify this one a bit:
> shrink_cache is thought to do what it says, it is given a number of
> pages it should somehow manage to free by shrinking the cache. What my
> patch does is go after the _whole_ list to fulfill that.

I would suggest a slight modification: make "max_mapped" grow as the
priority goes up.

Right now max_mapped is fixed at "nr_pages*10".

You could have something like

	max_mapped = nr_pages * 60 / priority;

instead, which might also alleviate the problem with not even bothering to
scan much of the inactive list simply because 99% of all pages are mapped.

That way you don't waste time on looking at the rest of the inactive list
until you _need_ to.

		Linus