Linux-kernel mailing list archive 2000-29,: RE: adding physical memory-pages to Linux' pool-of-pages

# RE: adding physical memory-pages to Linux' pool-of-pages

Heusden, Folkert van (f.v.heusden@ftr.nl)
Fri, 21 Jul 2000 15:42:23 +0200

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> JG> Have you benchmarked accessing system memory versus PCI shared
mem?
> JG> I'm thinking not...
> I'm thinking it doesn't matter that it's slower. I'm thinking it's
less
> slower than swapping to harddisk. Especially for the system I want to
> implement this. That one has harddisks doing 1MB/sec. I think access
trough
> PCI can do better then that.
JG> It *does* matter.

Why is that then?
Afaik the linux kernel has knowledge of several kinds of ram (at least the
Atari ST/TT-kernel should have), so just set it to the slow-variant.

JG> However using it as swap is perfectly feasible; in fact at least one
JG> patch has been posted to lkml which does such. (sorry, I don't have
JG> any reference, this old man's brain fails me at the moment)

Are you sure about that? Isn't it my previous attempt at this that you're
remembering? I'll have a quick search.

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