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move_pages() is best effort and can temporarily fail when concurrent faults race with page unmapping. A busy shared-anon workload can exhaust the current 100 retries long before the intended 20-second runtime and produce a false failure. Use the full runtime as the retry window. Since the initial page location is unknown, require it to reach both alternating NUMA targets to confirm that cross-node migration made progress despite transient contention. Link: https://lore.kernel.org/20260727095225.372655-6-usama.anjum@arm.com Signed-off-by: Muhammad Usama Anjum <usama.anjum@arm.com> Cc: Baolin Wang <baolin.wang@linux.alibaba.com> Cc: Barry Song <baohua@kernel.org> Cc: David Hildenbrand <david@kernel.org> Cc: Dev Jain <dev.jain@arm.com> Cc: Lance Yang <lance.yang@linux.dev> Cc: Liam R. Howlett <liam@infradead.org> Cc: Lorenzo Stoakes <ljs@kernel.org> Cc: Miaohe Lin <linmiaohe@huawei.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Naoya Horiguchi <nao.horiguchi@gmail.com> Cc: Nico Pache <npache@redhat.com> Cc: Ryan Roberts <ryan.roberts@arm.com> Cc: Sarthak Sharma <sarthak.sharma@arm.com> Cc: Shuah Khan <shuah@kernel.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Usama Arif <usama.arif@linux.dev> Cc: Vlastimil Babka <vbabka@kernel.org> Cc: Zi Yan <ziy@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>