> Good question. > > There are 19 free bits in my configuration but it's related to > CONFIG_NODES_SHIFT which is 9 for me (512 nodes) and very heavily affected > by options such as CONFIG_SPARSEMEM_VMEMMAP. Memory hot-remove does not work > with CONFIG_SPARSEMEM_VMEMMAP and enterprise distribution configs may be > taking the performance hit to enable memory hot-remove. If I disable this > option to enable memory hot-remove then there are 0 free bits in page->flags. FWIW, when using current mmotm, memory hot memory remove does work w/ CONFIG_SPARSEMEM_VMEMMAP. Recently Fujitsu changed. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>