Re: [PATCH v14 081/138] mm: Add folio_evictable()

David Howells
2021-08-10T21:41:47Z

Matthew Wilcox (Oracle) <willy@infradead.org> wrote:

> This is the folio equivalent of page_evictable(). Unfortunately, it's
> different from !folio_test_unevictable(), but I think it's used in places
> where you have to be a VM expert and can reasonably be expected to know
> the difference.

It would be useful to say how it is different. I'm guessing it's because a
page is always entirely mlocked or not, but a folio might be partially
mlocked?

David