/* unregister memory section under all nodes that it spans */ int unregister_mem_sect_under_nodes(struct memory_block *mem_blk, unsigned long phys_index) { NODEMASK_ALLOC(nodemask_t, unlinked_nodes, GFP_KERNEL); unsigned long pfn, sect_start_pfn, sect_end_pfn; if (!mem_blk) { NODEMASK_FREE(unlinked_nodes); return -EFAULT; } if (!unlinked_nodes) return -ENOMEM; nodes_clear(*unlinked_nodes); sect_start_pfn = section_nr_to_pfn(phys_index); sect_end_pfn = sect_start_pfn + PAGES_PER_SECTION - 1; for (pfn = sect_start_pfn; pfn <= sect_end_pfn; pfn++) { int nid; nid = get_nid_for_pfn(pfn); if (nid < 0) continue; if (!node_online(nid)) continue; if (node_test_and_set(nid, *unlinked_nodes)) continue; sysfs_remove_link(&node_devices[nid]->dev.kobj, kobject_name(&mem_blk->dev.kobj)); sysfs_remove_link(&mem_blk->dev.kobj, kobject_name(&node_devices[nid]->dev.kobj)); } NODEMASK_FREE(unlinked_nodes); return 0; }
/* register memory section under specified node if it spans that node */ int register_mem_sect_under_node(struct memory_block *mem_blk, int nid) { int ret; unsigned long pfn, sect_start_pfn, sect_end_pfn; if (!mem_blk) return -EFAULT; if (!node_online(nid)) return 0; sect_start_pfn = section_nr_to_pfn(mem_blk->start_section_nr); sect_end_pfn = section_nr_to_pfn(mem_blk->end_section_nr); sect_end_pfn += PAGES_PER_SECTION - 1; for (pfn = sect_start_pfn; pfn <= sect_end_pfn; pfn++) { int page_nid; page_nid = get_nid_for_pfn(pfn); if (page_nid < 0) continue; if (page_nid != nid) continue; ret = sysfs_create_link_nowarn(&node_devices[nid]->dev.kobj, &mem_blk->dev.kobj, kobject_name(&mem_blk->dev.kobj)); if (ret) return ret; return sysfs_create_link_nowarn(&mem_blk->dev.kobj, &node_devices[nid]->dev.kobj, kobject_name(&node_devices[nid]->dev.kobj)); } /* mem section does not span the specified node */ return 0; }
/* unregister memory section under all nodes that it spans */ int unregister_mem_sect_under_nodes(struct memory_block *mem_blk) { nodemask_t unlinked_nodes; unsigned long pfn, sect_start_pfn, sect_end_pfn; if (!mem_blk) return -EFAULT; nodes_clear(unlinked_nodes); sect_start_pfn = section_nr_to_pfn(mem_blk->phys_index); sect_end_pfn = sect_start_pfn + PAGES_PER_SECTION - 1; for (pfn = sect_start_pfn; pfn <= sect_end_pfn; pfn++) { int nid; nid = get_nid_for_pfn(pfn); if (nid < 0) continue; if (!node_online(nid)) continue; if (node_test_and_set(nid, unlinked_nodes)) continue; sysfs_remove_link(&node_devices[nid].sysdev.kobj, kobject_name(&mem_blk->sysdev.kobj)); } return 0; }
/* register memory section under specified node if it spans that node */ int register_mem_sect_under_node(struct memory_block *mem_blk, int nid) { int ret; unsigned long pfn, sect_start_pfn, sect_end_pfn; if (!mem_blk) return -EFAULT; if (!node_online(nid)) return 0; sect_start_pfn = section_nr_to_pfn(mem_blk->start_section_nr); sect_end_pfn = section_nr_to_pfn(mem_blk->end_section_nr); sect_end_pfn += PAGES_PER_SECTION - 1; for (pfn = sect_start_pfn; pfn <= sect_end_pfn; pfn++) { int page_nid; /* * memory block could have several absent sections from start. * skip pfn range from absent section */ if (!pfn_present(pfn)) { pfn = round_down(pfn + PAGES_PER_SECTION, PAGES_PER_SECTION) - 1; continue; } page_nid = get_nid_for_pfn(pfn); if (page_nid < 0) continue; if (page_nid != nid) continue; ret = sysfs_create_link_nowarn(&node_devices[nid]->dev.kobj, &mem_blk->dev.kobj, kobject_name(&mem_blk->dev.kobj)); if (ret) return ret; return sysfs_create_link_nowarn(&mem_blk->dev.kobj, &node_devices[nid]->dev.kobj, kobject_name(&node_devices[nid]->dev.kobj)); } /* mem section does not span the specified node */ return 0; }