Is an outside module supposed to use page cache?

Is an outside module supposed to use page cache?

[Ho Chak Hung]

Hi, 
I am trying to develop a module that makes use of the page cache(by allocating a LOT of pages use page_cache_alloc and then add_to_page_cache). However, I got some unresolved symbols error during insmod.(because the symbols related to lru_cache_add.... etc are not exported?) .
I am just wondering if I am not building a file system but at the same time want to allocate a lot of pages of physical memory to store something that has no backup storage as a file, should I add it to the page cache?
Any advice would be greatly appreciated
Thanks 
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Re: Is an outside module supposed to use page cache?

[Daniel Phillips]

On Thursday 28 June 2001 20:16, Ho Chak Hung wrote:
> Hi,
> I am trying to develop a module that makes use of the page cache(by
> allocating a LOT of pages use page_cache_alloc and then add_to_page_cache).
> However, I got some unresolved symbols error during insmod.(because the
> symbols related to lru_cache_add.... etc are not exported?) . I am just
> wondering if I am not building a file system but at the same time want to
> allocate a lot of pages of physical memory to store something that has no
> backup storage as a file, should I add it to the page cache? Any advice
> would be greatly appreciated

Why not use vmalloc?

If you must, just export the symbols you need, write your code, then either:

  a) Explain to Linus why the world needs those symbols exported
  b) Refine your approach to do it without those symbols

--
Daniel