Re: [PATCH/RFC] Simplified Readahead

[Steven Pratt]

Peter Chubb wrote:

> > > > > > "Andrew" == Andrew Morton <akpm@xxxxxxxx> writes:
> > > > > >            
>
> Andrew> Steven Pratt <slpratt@xxxxxxxxxxxxxx> wrote:
>  
>
> > > The readahead code has undergone many changes in the 2.6 kernel
> > > and the current implementation is in my opinion obtuse and hard to
> > > maintain.
> > >      
>
> Andrew> It did get a bit ugly - it was intially designed to handle
> Andrew> pagefault readaround and perhaps could be further simplified
> Andrew> as we're now doing that independently.
>
> If you're coding up new readahead schemes, it may be worth taking into
> account Papathanasiou and Scott, `Energy Efficient Prefetching and
> Caching'
> ( http://www.usenix.org/events/usenix04/tech/general/papathanasiou/papathanasiou_html/index.html
> )
>  
Have not had time to look into this yet, but I will.  

Thanks, Steve


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