Re: [PATCH v3 5/6] mm: Fix memory_failure() handling of dax-namespace metadata

2021-01-13 Thread David Hildenbrand
On 13.01.21 08:35, Dan Williams wrote: > Given 'struct dev_pagemap' spans both data pages and metadata pages be > careful to consult the altmap if present to delineate metadata. In fact > the pfn_first() helper already identifies the first valid data pfn, so > export that helper for other code

[PATCH v3 5/6] mm: Fix memory_failure() handling of dax-namespace metadata

2021-01-12 Thread Dan Williams
Given 'struct dev_pagemap' spans both data pages and metadata pages be careful to consult the altmap if present to delineate metadata. In fact the pfn_first() helper already identifies the first valid data pfn, so export that helper for other code paths via pgmap_pfn_valid(). Other usage of