quoted

Christoph> So what you mean is "swap on flash" ?  Defintively sounds
Christoph> like an interesting topic, although I'm not too sure it's
Christoph> all that filesystem-related.

I wouldn't want to call it swap, as this carries with it block-io
connotations.  It's really mmap on flash.

Yes it is really mmap on flash.  But you are "swapping" pages from RAM
to be mmap'ed on flash.  Also the flash-io complexities are similar to
the block-io layer.  I think "swap on flash" is fair.  Though that
might be confused with making swap work on a NAND flash, which is very
much like the current block-io approach.  "Mmappable swap on flash" is
more exact, I suppose.

quoted

You need either a block translation layer,

Are you suggesting to go through the block layer to reach the flash?

Well the obvious route would be to have this management layer use the
MTD, I can't see anything wrong with that.

quoted

or a (swap) filesystem that
understands flash peculiarities in order to make such a thing work.
The standard Linux swap format will not work.

Correct.

BTW, you may want to have a look at my "[RFC] VM: I have a dream..." thread.

Interesting.  This idea does allow for swap to be access directly.

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