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

[Martin J. Bligh]

>> The latency for interactive stuff is definitely more noticeable though, and
>> thus arguably more important. Perhaps we should be tying the scheduler in
>> more tightly with the VM - we've already decided there which apps are 
>> "interactive" and thus need low latency ... shouldn't we be giving a boost
>> to their RAM pages as well, and favour keeping those paged in over other
>> pages (whether other apps, or cache) logically? It's all latency still ...
> 
> I like this idea.  Maybe make it more general though--tasks with high scheduler priority also get more of a memory priority boost.  This will factor in the static priority as well as the interactivity bonus.

Yeah, see also my other mail in that thread - if we moved to file-object (address_space) and task anon (mm) based tracking, it should be much easier.
Also fits in nicely with Hugh's anon_mm code.

M.
 
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