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Is that expected > or a BUG? This behaviour comes from original fake-numa implementation, and has been left as is by M.Rapoport recent fake-numa changes. > > I would have thought, just like memory, that one resource only belongs > to one NUMA node. "All fake-NUMA nodes that belong to a physical NUMA node share the same CPU cores", this was already the case in original/x86-only implementation so that fake-NUMA does not affect application launch commands. > > >> >> With recent M.Rapoport set of fake-numa patches in mm-everything, >> this patch on top, using numa=fake=4 boot parameter : >> # numactl —hardware >> available: 12 nodes (0-11) >> node 0 cpus: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 >> 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 >> 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 >> 65 66 67 68 69 70 71 >> node 0 size: 122518 MB >> node 0 free: 116429 MB >> node 1 cpus: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 >> 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 >> 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 >> 65 66 67 68 69 70 71 >> node 1 size: 122631 MB >> node 1 free: 122576 MB >> node 2 cpus: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 >> 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 >> 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 >> 65 66 67 68 69 70 71 >> node 2 size: 122599 MB >> node 2 free: 122544 MB >> node 3 cpus: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 >> 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 >> 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 >> 65 66 67 68 69 70 71 >> node 3 size: 122479 MB >> node 3 free: 122419 MB >> node 4 cpus: >> node 4 size: 97280 MB >> node 4 free: 97279 MB > > > ^ Is this where your driver hotplugged a single node and hotplugged memory? Yes, Node 4 is a GPU node and its memory has been hotplugged by the driver. > > > -- > Cheers, > > David / dhildenb > Thanks for your review and comments/questions, bye, Bruno