search for: 43b39ab9de1a

...ts( *retry = true; return ___wait_var_event(&page->_refcount, - atomic_read(&page->_refcount) == 1, TASK_INTERRUPTIBLE, + dax_layout_is_idle_page(page), TASK_INTERRUPTIBLE, 0, 0, xfs_wait_dax_page(inode)); } diff --git a/include/linux/dax.h b/include/linux/dax.h index 43b39ab9de1a..3f78ed78d1d6 100644 --- a/include/linux/dax.h +++ b/include/linux/dax.h @@ -238,4 +238,9 @@ 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 p...

...atomic_read(&page->_refcount) == 1, TASK_INTERRUPTIBLE, > + dax_layout_is_idle_page(page), TASK_INTERRUPTIBLE, > 0, 0, xfs_wait_dax_page(inode)); > } > > diff --git a/include/linux/dax.h b/include/linux/dax.h > index 43b39ab9de1a..3f78ed78d1d6 100644 > --- a/include/linux/dax.h > +++ b/include/linux/dax.h > @@ -238,4 +238,9 @@ static inline bool dax_mapping(struct address_space *mapping) > return mapping->host && IS_DAX(mapping->host); > } > > +static inline bool dax_layout_is_idl...

Matthew Wilcox, Ira Weiny, and others have complained that ZONE_DEVICE struct page reference counting is ugly because they are "free" when the reference count is one instead of zero. This leads to explicit checks for ZONE_DEVICE pages in places like put_page(), GUP, THP splitting, and page migration which have to adjust the expected reference count when determining if the page is