Re: first thread

[Rik van Riel <riel@nl.linux.org>]

On Thu, 28 Jan 1999, Raphael Becker wrote:

> > "What is your favorite kernel feature that _didn't_
> >  make it in time for 2.2?"
> 
> some Mainboards can only cache 64MB of RAM. If you have more (eg
> 128 MB) the upper 64MB won´t be cached by the Board.
> 
> Is there a way to say to the kernel: start @64M down and use the
> upper 64M only for "fast swap" or something like this.

This is called 'slram' and the patch is available from
<somewhere>, you can find the link on the Linux-MM page.

> Another idea: Can you say him (the kernel) to bring only
> Buffer/Disk-Cache into the upper 64M, so your low 64M will be free
> of that and you can use the "fast" RAM for processing the running
> processes.

This is not yet implemented. Btw, page tables would also
be a good candidate, as would non-executable mmap()ed
data...

Rik -- If a Microsoft product fails, who do you sue?
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