Re: [PATCH -mm] vmscan: protect a fraction of file backed mapped pages from reclaim

Rik van Riel
2009-05-12T20:19:19Z

Christoph Lameter wrote:
> On Tue, 12 May 2009, Rik van Riel wrote:
>
>>> Streaming I/O means access once?
>> Yeah, "used-once pages" would be a better criteria, since
>> you could go through a gigantic set of used-once pages without
>> doing linear IO.
>
> Can we see some load for which this patch has a beneficial effect?
> With some numbers?

How many do you want before you're satisfied that this
benefits a significant number of workloads?

How many numbers do you want to feel safe that no workloads
suffer badly from this patch?

Also, wow would you measure a concept as nebulous as desktop
interactivity?

Btw, the patch has gone into the Fedora kernel RPM to get
a good amount of user testing. I'll let you know what the
users say (if anything).

--
All rights reversed.