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>> - folios[i] = NULL; >> + unpin_folio(pofs_get_folio(pofs, i)); > > We already retrieved the folio before, cannot we just bypass > pofs_get_folio() here? > Yes, you are right. Andrew, can we please add this fixup on top of the commits in today's mm-hotfixes-unstable (or, let me know if you'd prefer a v3 instead): diff --git a/mm/gup.c b/mm/gup.c index 0a22f7def83c..ad0c8922dac3 100644 --- a/mm/gup.c +++ b/mm/gup.c @@ -2399,7 +2399,7 @@ migrate_longterm_unpinnable_folios(struct list_head *movable_folio_list, * calling folio_isolate_lru() which takes a reference so the * folio won't be freed if it's migrating. */ - unpin_folio(pofs_get_folio(pofs, i)); + unpin_folio(folio); pofs_clear_entry(pofs, i); } thanks, -- John Hubbard