Re: 2.4.23aa2 (bugfixes and important VM improvements for the high end)

[Andrea Arcangeli]

On Sun, Mar 07, 2004 at 09:41:20AM +0100, Ingo Molnar wrote:
> 
> * Andrea Arcangeli <andrea@xxxxxxx> wrote:
> 
> > [...] but I'm quite confortable to say that up to 16G (included) 4:4
> > is worthless unless you've to deal with the rmap waste IMHO. [...]
> 
> i've seen workloads on 8G RAM systems that easily filled up the ~800 MB
> lowmem zone. (it had to do with many files and having them as a big

was that a kernel with rmap or w/o rmap?

> but i'm quite strongly convinced that 'getting rid' of the 'pte chain
> overhead' in favor of questionable lowmem space gains for a dying
> (high-end server) platform is very shortsighted. [getting rid of them
> for purposes of the 64-bit platforms could be OK, but the argumentation
> isnt that strong there i think.]

disagree, the reason I'm doing it is for the 64bit platforms, I can't
care less about x86. the vm is dogslow with rmap.
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