On Sun, May 22, 2011 at 3:25 PM, Hugh Dickins <hughd@xxxxxxxxxx> wrote:
>
> But drivers/gpu/drm i915 and ttm are using read_cache_page_gfp() or
> read_mapping_page() on tmpfs: on objects created by shmem_file_setup().
>
> Nothing else uses read_cache_page_gfp(). I cannot find anything else
> using read_mapping_page() on tmpfs, but wonder if something might be
> out there. Stacked filesystems appear not to go that way nowadays.
>
> Would it be better to make i915 and ttm call shmem_read_cache_page()
> directly? Perhaps removing the then unused read_cache_page_gfp(), or
> perhaps not: may still be needed for i915 and ttm on tiny !SHMEM ramfs.
I would certainly prefer the "make i915 and ttm call
shmem_read_cache_page directly" approach over putting some nasty hack
in __read_cache_page.
Linus
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