Re: ~500 megs cached yet 2.6.5 goes into swap hell

[Nick Piggin]

Jeff Garzik wrote:
> Brett E. wrote:
>
> > exits, freeing up the malloc'ed memory. This brings free memory up by 
> > 400 megs and brings the cache down to close to 0, of course the cache 
>
>
> Yeah, I have something similar (attached).  Run it like
>
>     fillmem <number-of-megabytes>
>
>
> > grows right afterwards. It would be nice to cap the cache 
> > datastructures in the kernel but I've been posting about this since 
> > September to no avail so my expectations are pretty low.
>
>
> This is a frequent request...  although I disagree with a hard cap on 
> the cache, I think the request (and similar ones) should hopefully 
> indicate to the VM gurus that the kernel likes cache better than anon 
> VMAs that must be swapped out.

For 2.6.6-rc2-mm2:
http://www.kerneltrap.org/~npiggin/vm-rollup.patch.gz

/proc/sys/vm/mapped_page_cost - indicate which *you* like better ;)
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