Re: [RFC PATCH v2 1/8] ext4/xfs: add page refcount helper
From: Matthew Wilcox <willy@infradead.org>
Date: 2021-06-09 19:24:11
Also in:
amd-gfx, dri-devel
On Mon, Jun 07, 2021 at 03:42:19PM -0500, Alex Sierra wrote:
quoted hunk ↗ jump to hunk
+++ b/include/linux/dax.h@@ -243,6 +243,16 @@ static inline bool dax_mapping(struct address_space *mapping) return mapping->host && IS_DAX(mapping->host); } +static inline bool dax_layout_is_idle_page(struct page *page) +{ + return page_ref_count(page) == 1; +}
We already have something called an idle page, and that's quite a different thing from this. How about dax_page_unused() (it's a use count, so once it's got down to its minimum value, it's unused)?