From ace1db39768cdc58f6b157d99ae5958ad34ffff8 Mon Sep 17 00:00:00 2001 From: Oscar Salvador Date: Tue, 21 Aug 2018 21:53:29 -0700 Subject: [PATCH] mm/page_alloc.c: move ifdefery out of free_area_init_core Patch series "Refactor free_area_init_core and add free_area_init_core_hotplug", v6. This patchset does three things: 1) Clean up/refactor free_area_init_core/free_area_init_node by moving the ifdefery out of the functions. 2) Move the pgdat/zone initialization in free_area_init_core to its own function. 3) Introduce free_area_init_core_hotplug, a small subset of free_area_init_core, which is only called from memhotlug code path. In this way, we have: free_area_init_core: called during early initialization free_area_init_core_hotplug: called whenever a new node is allocated/re-used (memhotplug path) This patch (of 5): Moving the #ifdefs out of the function makes it easier to follow. Link: http://lkml.kernel.org/r/20180730101757.28058-2-osalvador@techadventures.net Signed-off-by: Oscar Salvador Acked-by: Michal Hocko Reviewed-by: Pavel Tatashin Acked-by: Vlastimil Babka Cc: Pasha Tatashin Cc: Mel Gorman Cc: Aaron Lu Cc: Joonsoo Kim Cc: Dan Williams Cc: David Hildenbrand Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/page_alloc.c | 50 ++++++++++++++++++++++++++++++++++++------------- 1 file changed, 37 insertions(+), 13 deletions(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 15ea511fb41c..455cc3bfae99 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -6194,6 +6194,37 @@ static unsigned long __paginginit calc_memmap_size(unsigned long spanned_pages, return PAGE_ALIGN(pages * sizeof(struct page)) >> PAGE_SHIFT; } +#ifdef CONFIG_NUMA_BALANCING +static void pgdat_init_numabalancing(struct pglist_data *pgdat) +{ + spin_lock_init(&pgdat->numabalancing_migrate_lock); + pgdat->numabalancing_migrate_nr_pages = 0; + pgdat->numabalancing_migrate_next_window = jiffies; +} +#else +static void pgdat_init_numabalancing(struct pglist_data *pgdat) {} +#endif + +#ifdef CONFIG_TRANSPARENT_HUGEPAGE +static void pgdat_init_split_queue(struct pglist_data *pgdat) +{ + spin_lock_init(&pgdat->split_queue_lock); + INIT_LIST_HEAD(&pgdat->split_queue); + pgdat->split_queue_len = 0; +} +#else +static void pgdat_init_split_queue(struct pglist_data *pgdat) {} +#endif + +#ifdef CONFIG_COMPACTION +static void pgdat_init_kcompactd(struct pglist_data *pgdat) +{ + init_waitqueue_head(&pgdat->kcompactd_wait); +} +#else +static void pgdat_init_kcompactd(struct pglist_data *pgdat) {} +#endif + /* * Set up the zone data structures: * - mark all pages reserved @@ -6208,21 +6239,14 @@ static void __paginginit free_area_init_core(struct pglist_data *pgdat) int nid = pgdat->node_id; pgdat_resize_init(pgdat); -#ifdef CONFIG_NUMA_BALANCING - spin_lock_init(&pgdat->numabalancing_migrate_lock); - pgdat->numabalancing_migrate_nr_pages = 0; - pgdat->numabalancing_migrate_next_window = jiffies; -#endif -#ifdef CONFIG_TRANSPARENT_HUGEPAGE - spin_lock_init(&pgdat->split_queue_lock); - INIT_LIST_HEAD(&pgdat->split_queue); - pgdat->split_queue_len = 0; -#endif + + pgdat_init_numabalancing(pgdat); + pgdat_init_split_queue(pgdat); + pgdat_init_kcompactd(pgdat); + init_waitqueue_head(&pgdat->kswapd_wait); init_waitqueue_head(&pgdat->pfmemalloc_wait); -#ifdef CONFIG_COMPACTION - init_waitqueue_head(&pgdat->kcompactd_wait); -#endif + pgdat_page_ext_init(pgdat); spin_lock_init(&pgdat->lru_lock); lruvec_init(node_lruvec(pgdat)); -- 2.34.1