Re: -mm merge plans for 2.6.23

[david@lang.hm]

On Wed, 25 Jul 2007, david@lang.hm wrote:

> Subject: Re: -mm merge plans for 2.6.23
>
> On Wed, 25 Jul 2007, Rene Herman wrote:
>
> >  On 07/25/2007 10:07 AM, david@lang.hm wrote:
> >
> > >   On Wed, 25 Jul 2007, Rene Herman wrote:
> >
> > > >   Something like this?
> >
> >  [ ... ]
> >
> > >   when the swap readahead is enabled does it make a significant 
> > >   difference
> > >   in the time to do the random access?
> >
> >  I don't use swap prefetch (nor -ck or -mm). If someone who has the patch
> >  applied waits to hit enter until swap prefetch has prefetched it all back
> >  in again, it certainly will.
> >
> >  Swap prefetch's potential to do larger reads back from swapspace than a
> >  random segfaulting app could well be very significant. Reads are dwarved
> >  by seeks. If this program does what you wanted, please use it to show us.
>
> I haven't used swap prefetch either, the call was put out for what could be 
> used to test the performance, and I was suggesting a test.
>
> if nobody else follows up on this I'll try to get some time to test it myself 
> in a day or two.

this assumes that this isn't ruled an invalid test in the meantime.

in any case thanks for codeing this up so quickly.

David Lang
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