[Qemu-devel] Re: [RFC][PATCH 1/3] Linux/Guest unmapped page cache control

[Christoph Lameter]

On Wed, 3 Nov 2010, Balbir Singh wrote:

> > > +#define UNMAPPED_PAGE_RATIO 16
> >
> > Maybe come up with a scheme that allows better configuration of the
> > mininum? I think in some setting we may want an absolute limit and in
> > other a fraction of something (total zone size or working set?)
> >
>
> Are you suggesting a sysctl or computation based on zone size and
> limit, etc? I understand it to be the latter.

Do a computation based on zone size on startup and then allow the
user to modify the absolute size of the page cache?


Hmmm.. That would have to be per zone/node or somehow distributed over all
zones/nodes.