Messages in this thread | | | Date | Mon, 23 Jan 2012 11:40:25 -0800 | From | Andrew Morton <> | Subject | Re: [PATCH 1/5] staging: zsmalloc: zsmalloc memory allocation library |
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On Mon, 23 Jan 2012 13:57:36 -0500 Nitin Gupta <ngupta@vflare.org> wrote:
> > afacit this code should be added to core mm/. Addition of code like > > this to core mm/ will be fiercely resisted on principle! Hence the > > (currently missing) justifications for adding it had best be good ones. > > > > > I don't think this code should ever get into mm/ since its just a driver > specific allocator.
Like mm/mempool.c and mm/dmapool.c ;)
> However its used by more than one driver (zcache and > zram) so it may be moved to lib/ or drivers/zsmalloc atmost?
I'd need to take another look at the code, but if the allocator is a good and useful thing then we want other kernel code to use it where possible and appropriate. Putting it in mm/ or lib/ says "hey, use this".
The code is extensively poking around in MM internals, especially the pageframe fields. So I'd say it's a part of MM (in mm/) rather than a clean client of MM, which would place it in lib/.
btw, kmap_atomic() already returns void*, so casting its return value is unneeded.
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