Re: How to reclaim inode pages on demand

[Magnus Damm]

On 8/11/05, Andrew Morton <akpm@xxxxxxxx> wrote:
> Mel Gorman <mel@xxxxxxxxx> wrote:
> > The majority of pages I am seeing no longer have page->mapping set. Does
> > this mean they are in the process of being cleared up?
> 
> They're just anonymous pages, aren't they?  But you said "pages that are
> being used for inodes".  Confused.

I thought page->mapping was used by rmap for both inode-backed and
anonymous pages. And the PAGE_MAPPING_ANON bit was used to determine
that page->mapping points to struct anon_vma instead of struct
address_space.

When is page->mapping NULL?

/ magnus
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