[PATCHv11 3/4] zswap: add to mm/

[Seth Jennings]

On Wed, May 15, 2013 at 02:55:06PM -0400, Konrad Rzeszutek Wilk wrote:
> > Sorry, but I don't think that's appropriate for a patch in the MM subsystem.
> 
> I am heading to the airport shortly so this email is a bit hastily typed.
> 
> Perhaps a compromise can be reached where this code is merged as a driver
> not a core mm component. There is a high bar to be in the MM - it has to
> work with many many different configurations. 
> 
> And drivers don't have such a high bar. They just need to work on a specific
> issue and that is it. If zswap ended up in say, drivers/mm that would make
> it more palpable I think.
> 
> Thoughts?

zswap, the writeback code particularly, depends on a number of non-exported
kernel symbols, namely:

swapcache_free
__swap_writepage
__add_to_swap_cache
swapcache_prepare
swapper_spaces

So it can't currently be built as a module and I'm not sure what the MM
folks would think about exporting them and making them part of the KABI.

Seth