Re: [RFC] mmaped copy too slow?

Peter Zijlstra
2008-01-15T08:58:19Z

On Tue, 2008-01-15 at 12:20 +0900, KOSAKI Motohiro wrote:
> Hi Rik
>
> > While being able to deal with used-once mappings in page reclaim
> > could be a good idea, this would require us to be able to determine
> > the difference between a page that was accessed once since it was
> > faulted in and a page that got accessed several times.
>
> it makes sense that read ahead hit assume used-once mapping, may be.
> I will try it.

I once had a patch that made read-ahead give feedback into page reclaim,
but people didn't like it.