Re: Memory compression (again). . help?

[John Richard Moser <nigelenki@comcast.net>]

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Alexander E. Patrakov wrote:
> John Richard Moser wrote:
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>> I'm not quite sure what I'm doing or when I have time, but I'm looking
>> into writing in some hooks and a compression routine to manage
>> compressed memory.  I have the following considerations:
>>
>>  - Compressed memory should become "Swap."  This means the kernel would
>>    report memory used for compressed storage as used swap.  At boot it
>>    would reflect 0K swap; when there are 1024KiB of pages compressed in
>>    memory, 1024KiB of additional "swap" is reported, all used.
>>  - I need to stop the kernel when it's about to swap.  This should be
>>    done when it's decided that either invalidating disk cache or
>>    swapping is the best course of action, and what to do with what.  At
>>    this point I'll have to be able to see what the kernel wants to swap
>>    out and tell it that it's taken care of.
>>  - I need to catch invalid pagefaults that look for swap, as well as the
>>    disk cache mechanism.  I'll be adding stuff to compress disk cache,
>>    so disk cache might need to be "swapped in" effectively.
> 
> If you are OK with using a ery old 2.4.18 kernel, look at
> http://linuxcompressed.sourceforge.net/
> 

I'm actually looking to submit to mainline in the end ;P  It'd be a very
good permenant feature.  RAM is cheap, but CPU is even cheaper; if I buy
a gig of RAM and get 200M free, woohoo?

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