Re: Cache incoherencies

Rogier Wolff (R.E.Wolff@BitWizard.nl)
Fri, 27 Aug 1999 20:20:18 +0200 (MEST)

Russell King wrote:
> > Currently (IIRC) there is a big macro instantiated twice to handle DMA
> > or non-DMA memory. If we generalize this to handle many lists of free
> > pages, we'll move to just one instantiation of "grab a block from a
> > list". This is likely to have a smaller cache-footprint leading to a
> > performance improvement.
>
> Unless my sight is failing, grep and less only indicate that the
> macro is instantiated only once to handle the memory allocation.

Yep, I was wrong. It is no longer instantiated twice. It now does a
linear search for a DMA-able page. Brilliant. I bet you it doesn't
make a difference in a lot of cases.

Roger. 

-- 
** R.E.Wolff@BitWizard.nl ** http://www.BitWizard.nl/ ** +31-15-2137555 **
*-- BitWizard writes Linux device drivers for any device you may have! --*
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