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migration failed >>>>> else /* MPOL_MF_STRICT alone */ >>>>> break early if meets unmovable and don't call mbind_range() at all >>>>> else /* none of those flags */ >>>>> check the ranges in test_walk, EFAULT without mbind_range() if discontig. >> With this change I think my temporary fix at >> https://lore.kernel.org/all/20230918211608.3580629-1-surenb@google.com/ >> can be removed because we either scan all vmas (which means we locked >> them all) or we break early and do not call mbind_range() at all (in >> which case we don't need vmas to be locked). Yes, we could just drop it. Keep the code not depend on the subtle behavior of queue_pages_range() by keeping it is ok to me either. I don't have strong preference. > Thanks, I dropped "mm: lock VMAs skipped by a failed queue_pages_range()" Thanks, Andrew.