Re: [PATCH 2/3] vmscan: make mapped executable pages the first class citizen

From: KOSAKI Motohiro
Date: Tue May 19 2009 - 04:06:53 EST


> > > Like the console mode, the absolute nr_mapped drops considerably - to 1/13 of
> > > the original size - during the streaming IO.
> > >
> > > The delta of pgmajfault is 3 vs 107 during IO, or 236 vs 393 during the whole
> > > process.
> >
> > hmmm.
> >
> > about 100 page fault don't match Elladan's problem, I think.
> > perhaps We missed any addional reproduce condition?
>
> Elladan's case is not the point of this test.
> Elladan's IO is use-once, so probably not a caching problem at all.
>
> This test case is specifically devised to confirm whether this patch
> works as expected. Conclusion: it is.

Dejection ;-)

The number should address the patch is useful or not. confirming as expected
is not so great.
I don't think your patch is strange, but I really want to find reproduce way.



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