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SubjectRe: [PATCH 1/3]: compressed RAM block device
Date
On Tuesday 17 March 2009 22:36:46 Nitin Gupta wrote:
> drivers/block/Kconfig | 22 +
> drivers/block/Makefile | 1 +
> drivers/block/compcache.c | 995
> +++++++++++++++++++++++++++++++++++++++++++++ drivers/block/compcache.h |
> 160 ++++++++
> 4 files changed, 1178 insertions(+), 0 deletions(-)
>
> Creates RAM based block device (ramzswap0) which can be used as swap
> device. Pages swapped to this are compressed and stored in memory itself.
>
> The module is called compcache.ko. It depends on:
> - xvmalloc.ko: memory allocator
> - lzo_compress.ko
> - lzo_decompress.ko
>
> See Documentation/blockdev/compcache.txt for usage details.
>
> Project home: http://code.google.com/p/compcache/

I wonder how hard it would be to make the compression code
use an arbitrary file or device for the storage backend rather
than make a new block device? Then you could make a new ram
block device that can swap its pages out (or even extend brd.c
with that functionality, or use loop on tmpfs etc).





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