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Patch series "Unify vma_address and vma_pgoff_address".
The current vma_address() pretends that the ambiguity between head & tail
page is an advantage. If you pass a head page to vma_address(), it will
operate on all pages in the folio, while if you pass a tail page, it will
operate on a single page. That's not what any of the callers actually
want, so first convert all callers to use vma_pgoff_address() and then
rename vma_pgoff_address() to vma_address().
This patch (of 3):
If 'page' is the first page of a large folio then vma_address() will scan
for any page in the entire folio. This can lead to page_mapped_in_vma()
returning true if some of the tail pages are mapped and the head page is
not. This could lead to memory failure choosing to kill a task
unnecessarily.
Link: https://lkml.kernel.org/r/20240328225831.1765286-1-willy@infradead.org
Link: https://lkml.kernel.org/r/20240328225831.1765286-2-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
7e8347413e