Re: [patch 5/9] mm + fs: prepare for non-page entries in page cacheradix trees

[Rik van Riel]

On 01/10/2014 01:10 PM, Johannes Weiner wrote:
> shmem mappings already contain exceptional entries where swap slot
> information is remembered.
> 
> To be able to store eviction information for regular page cache,
> prepare every site dealing with the radix trees directly to handle
> entries other than pages.
> 
> The common lookup functions will filter out non-page entries and
> return NULL for page cache holes, just as before.  But provide a raw
> version of the API which returns non-page entries as well, and switch
> shmem over to use it.
> 
> Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>

Reviewed-by: Rik van Riel <riel@xxxxxxxxxx>

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