diff options
Diffstat (limited to 'mm/memory_hotplug.c')
| -rw-r--r-- | mm/memory_hotplug.c | 48 |
1 files changed, 32 insertions, 16 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index da374cd3d45b..e9d5ab5d3ca0 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -350,6 +350,16 @@ int __ref __add_pages(int nid, unsigned long pfn, unsigned long nr_pages, return err; } +#ifdef CONFIG_NUMA +int __weak memory_add_physaddr_to_nid(u64 start) +{ + pr_info_once("Unknown target node for memory at 0x%llx, assuming node 0\n", + start); + return 0; +} +EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid); +#endif + /* find the smallest valid pfn in the range [start_pfn, end_pfn) */ static unsigned long find_smallest_section_pfn(int nid, struct zone *zone, unsigned long start_pfn, @@ -831,21 +841,26 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, zone->zone_pgdat->node_present_pages += onlined_pages; pgdat_resize_unlock(zone->zone_pgdat, &flags); + /* + * When exposing larger, physically contiguous memory areas to the + * buddy, shuffling in the buddy (when freeing onlined pages, putting + * them either to the head or the tail of the freelist) is only helpful + * for maintaining the shuffle, but not for creating the initial + * shuffle. Shuffle the whole zone to make sure the just onlined pages + * are properly distributed across the whole freelist. + */ shuffle_zone(zone); node_states_set_node(nid, &arg); if (need_zonelists_rebuild) build_all_zonelists(NULL); - else - zone_pcp_update(zone); + zone_pcp_update(zone); init_per_zone_wmark_min(); kswapd_run(nid); kcompactd_run(nid); - vm_total_pages = nr_free_pagecache_pages(); - writeback_set_ratelimit(); memory_notify(MEM_ONLINE, &arg); @@ -1261,26 +1276,30 @@ found: static struct page *new_node_page(struct page *page, unsigned long private) { - int nid = page_to_nid(page); nodemask_t nmask = node_states[N_MEMORY]; + struct migration_target_control mtc = { + .nid = page_to_nid(page), + .nmask = &nmask, + .gfp_mask = GFP_USER | __GFP_MOVABLE | __GFP_RETRY_MAYFAIL, + }; /* * try to allocate from a different node but reuse this node if there * are no other online nodes to be used (e.g. we are offlining a part * of the only existing node) */ - node_clear(nid, nmask); + node_clear(mtc.nid, nmask); if (nodes_empty(nmask)) - node_set(nid, nmask); + node_set(mtc.nid, nmask); - return new_page_nodemask(page, nid, &nmask); + return alloc_migration_target(page, (unsigned long)&mtc); } static int do_migrate_range(unsigned long start_pfn, unsigned long end_pfn) { unsigned long pfn; - struct page *page; + struct page *page, *head; int ret = 0; LIST_HEAD(source); @@ -1288,15 +1307,14 @@ do_migrate_range(unsigned long start_pfn, unsigned long end_pfn) if (!pfn_valid(pfn)) continue; page = pfn_to_page(pfn); + head = compound_head(page); if (PageHuge(page)) { - struct page *head = compound_head(page); pfn = page_to_pfn(head) + compound_nr(head) - 1; isolate_huge_page(head, &source); continue; } else if (PageTransHuge(page)) - pfn = page_to_pfn(compound_head(page)) - + hpage_nr_pages(page) - 1; + pfn = page_to_pfn(head) + thp_nr_pages(page) - 1; /* * HWPoison pages have elevated reference counts so the migration would @@ -1595,7 +1613,6 @@ static int __ref __offline_pages(unsigned long start_pfn, kcompactd_stop(node); } - vm_total_pages = nr_free_pagecache_pages(); writeback_set_ratelimit(); memory_notify(MEM_OFFLINE, &arg); @@ -1742,7 +1759,7 @@ static int __ref try_remove_memory(int nid, u64 start, u64 size) */ rc = walk_memory_blocks(start, size, NULL, check_memblock_offlined_cb); if (rc) - goto done; + return rc; /* remove memmap entry */ firmware_map_remove(start, start + size, "System RAM"); @@ -1766,9 +1783,8 @@ static int __ref try_remove_memory(int nid, u64 start, u64 size) try_offline_node(nid); -done: mem_hotplug_done(); - return rc; + return 0; } /** |