Re: why are some low-level MM routines being exported?

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On Mon, Apr 05, 2010 at 12:59:44AM +0900, Minchan Kim (minchan.kim@xxxxxxxxx) wrote:
> > perusing the code in mm/filemap.c and i'm curious as to why routines
> > like, for example, add_to_page_cache_lru() are being exported.  is it
> > really expected that loadable modules might access routines like that
> > directly?
> 
> It is added by 18bc0bbd162e3 for pohmelfs and now used by logfs, too. 
> I didn't noticed that at that time.
> With git log, any mm guys didn't add Signed-off-by or Reviewed-by.
> 
> I think it's not good for file system or module to use it directly. 
> It would make LRU management harder. 

How come?

> Is it really needed? Let's think again. 

Yes, it is really needed. It is not a some king of low-level mm magic to
export, but a useful interface to work with LRU lists instead of
copy-paste it into own machinery.

-- 
	Evgeniy Polyakov

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