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SubjectRe: [PATCH v4 00/10] Prevent LRU churning
On Wed, Jul 27, 2011 at 01:16:50PM -0700, Andrew Morton wrote:
> On Mon, 4 Jul 2011 23:04:33 +0900
> Minchan Kim <minchan.kim@gmail.com> wrote:
>
> > Test result is following as.
> >
> > 1) Elapased time 10GB file decompressed.
> > Old inorder inorder + pagevec flush[10/10]
> > 01:47:50.88 01:43:16.16 01:40:27.18
> >
> > 2) failure of inorder lru
> > For test, it isolated 375756 pages. Only 45875 pages(12%) are put backed to
> > out-of-order(ie, head of LRU) Others, 329963 pages(88%) are put backed to in-order
> > (ie, position of old page in LRU).
>
> I'm getting more and more worried about how complex MM is becoming and
> this patchset doesn't take us in a helpful direction :(

Hmm. I think it's not too complicated stuff. :(
But I understand your concern enoughly.

>
> But it's hard to argue with numbers like that. Please respin patches 6-10?

Of course, but it would be rather late due to my business and other interesting features.
I will try to get a new data point in next version.

Thanks, Andrew.

>
>

--
Kind regards,
Minchan Kim


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