Re: [patch 3/3] mm: keep pages from unevictable mappings off the LRU lists

[David Howells]

Johannes Weiner <hannes@xxxxxxxxxxx> wrote:

> -		if (page_is_file_cache(page))
> +		if (mapping_unevictable(mapping))
> +			add_page_to_unevictable_list(page);
> +		else if (page_is_file_cache(page))

It would be nice to avoid adding an extra test and branch in here.  This
function is used a lot, and quite often we know the answer to the first test
before we even get here.

David
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