Hi Hugh! On Sun, Nov 06, 2022 at 01:06:19PM -0800, Hugh Dickins wrote: > See folio_lock_anon_vma_read(): folio_mapped() plays a key role in > establishing the continued validity of an anon_vma. See comments > above folio_get_anon_vma(), some by me but most by PeterZ IIRC. Ohhh, you're quite right. Unfortunately I seem to have completely forgotten about that :-(