Message-ID: <4403CAE9.5020007@ums.usu.ru>
Date: Tue, 28 Feb 2006 09:00:41 +0500
From: "Alexander E. Patrakov" <patrakov@ums.usu.ru>
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To: John Richard Moser <nigelenki@comcast.net>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: Re: Memory compression (again). . help?
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John Richard Moser wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> 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/

-- 
Alexander E. Patrakov
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