rebase on top of previous changes --- >From dfb7cab2783d2175ad8355ce65943a28e43d8700 Mon Sep 17 00:00:00 2001 From: Michal Hocko <mhocko@xxxxxxxx> Date: Wed, 29 Mar 2017 18:08:51 +0200 Subject: [PATCH] mm, memory_hotplug: remove unused cruft after memory hotplug rework arch_add_memory doesn't need for_device parameter anymore because devm_memremap_pages already does all what it needs to. zone_for_memory doesn't have any user anymore as well as the whole zone shifting infrastructure so drop them as well. Signed-off-by: Michal Hocko <mhocko@xxxxxxxx> --- arch/ia64/mm/init.c | 2 +- arch/powerpc/mm/mem.c | 2 +- arch/s390/mm/init.c | 2 +- arch/sh/mm/init.c | 3 +- arch/x86/mm/init_32.c | 2 +- arch/x86/mm/init_64.c | 2 +- include/linux/memory_hotplug.h | 4 +- kernel/memremap.c | 2 +- mm/memory_hotplug.c | 209 +---------------------------------------- 9 files changed, 9 insertions(+), 219 deletions(-) diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c index 0fb7f3946785..6ebb570f1eae 100644 --- a/arch/ia64/mm/init.c +++ b/arch/ia64/mm/init.c @@ -645,7 +645,7 @@ mem_init (void) } #ifdef CONFIG_MEMORY_HOTPLUG -int arch_add_memory(int nid, u64 start, u64 size, bool for_device) +int arch_add_memory(int nid, u64 start, u64 size) { unsigned long start_pfn = start >> PAGE_SHIFT; unsigned long nr_pages = size >> PAGE_SHIFT; diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index db1369a7f69f..707a4146938b 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -126,7 +126,7 @@ int __weak remove_section_mapping(unsigned long start, unsigned long end) return -ENODEV; } -int arch_add_memory(int nid, u64 start, u64 size, bool for_device) +int arch_add_memory(int nid, u64 start, u64 size) { unsigned long start_pfn = start >> PAGE_SHIFT; unsigned long nr_pages = size >> PAGE_SHIFT; diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c index 9e8c515ee29f..7d7591b63b57 100644 --- a/arch/s390/mm/init.c +++ b/arch/s390/mm/init.c @@ -153,7 +153,7 @@ void __init free_initrd_mem(unsigned long start, unsigned long end) #endif #ifdef CONFIG_MEMORY_HOTPLUG -int arch_add_memory(int nid, u64 start, u64 size, bool for_device) +int arch_add_memory(int nid, u64 start, u64 size) { unsigned long start_pfn = PFN_DOWN(start); unsigned long size_pages = PFN_DOWN(size); diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c index 95261b66bcf3..4e4afa0ab3c3 100644 --- a/arch/sh/mm/init.c +++ b/arch/sh/mm/init.c @@ -485,13 +485,12 @@ void free_initrd_mem(unsigned long start, unsigned long end) #endif #ifdef CONFIG_MEMORY_HOTPLUG -int arch_add_memory(int nid, u64 start, u64 size, bool for_device) +int arch_add_memory(int nid, u64 start, u64 size) { unsigned long start_pfn = PFN_DOWN(start); unsigned long nr_pages = size >> PAGE_SHIFT; int ret; - /* We only have ZONE_NORMAL, so this is easy.. */ ret = __add_pages(nid, start_pfn, nr_pages); if (unlikely(ret)) diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c index 5de79aa7d6ce..b389f2ec75f9 100644 --- a/arch/x86/mm/init_32.c +++ b/arch/x86/mm/init_32.c @@ -816,7 +816,7 @@ void __init mem_init(void) } #ifdef CONFIG_MEMORY_HOTPLUG -int arch_add_memory(int nid, u64 start, u64 size, bool for_device) +int arch_add_memory(int nid, u64 start, u64 size) { unsigned long start_pfn = start >> PAGE_SHIFT; unsigned long nr_pages = size >> PAGE_SHIFT; diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index bc53f24e6703..20f575333b08 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -637,7 +637,7 @@ static void update_end_of_memory_vars(u64 start, u64 size) } } -int arch_add_memory(int nid, u64 start, u64 size, bool for_device) +int arch_add_memory(int nid, u64 start, u64 size) { unsigned long start_pfn = start >> PAGE_SHIFT; unsigned long nr_pages = size >> PAGE_SHIFT; diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h index 63577ce57028..d5adb7c468d1 100644 --- a/include/linux/memory_hotplug.h +++ b/include/linux/memory_hotplug.h @@ -274,9 +274,7 @@ extern int walk_memory_range(unsigned long start_pfn, unsigned long end_pfn, void *arg, int (*func)(struct memory_block *, void *)); extern int add_memory(int nid, u64 start, u64 size); extern int add_memory_resource(int nid, struct resource *resource, bool online); -extern int zone_for_memory(int nid, u64 start, u64 size, int zone_default, - bool for_device); -extern int arch_add_memory(int nid, u64 start, u64 size, bool for_device); +extern int arch_add_memory(int nid, u64 start, u64 size); extern void move_pfn_range_to_zone(struct zone *zone, unsigned long start_pfn, unsigned long nr_pages); extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages); diff --git a/kernel/memremap.c b/kernel/memremap.c index 1b137649cb82..808f7974918a 100644 --- a/kernel/memremap.c +++ b/kernel/memremap.c @@ -366,7 +366,7 @@ void *devm_memremap_pages(struct device *dev, struct resource *res, lock_device_hotplug(); mem_hotplug_begin(); - error = arch_add_memory(nid, align_start, align_size, true); + error = arch_add_memory(nid, align_start, align_size); if (!error) move_pfn_range_to_zone(&NODE_DATA(nid)->node_zones[ZONE_DEVICE], align_start, align_size); diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 3a8b24e47a2b..b9dc1c4e26c3 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -295,180 +295,6 @@ void __init register_page_bootmem_info_node(struct pglist_data *pgdat) } #endif /* CONFIG_HAVE_BOOTMEM_INFO_NODE */ -static void __meminit grow_zone_span(struct zone *zone, unsigned long start_pfn, - unsigned long end_pfn) -{ - unsigned long old_zone_end_pfn; - - zone_span_writelock(zone); - - old_zone_end_pfn = zone_end_pfn(zone); - if (zone_is_empty(zone) || start_pfn < zone->zone_start_pfn) - zone->zone_start_pfn = start_pfn; - - zone->spanned_pages = max(old_zone_end_pfn, end_pfn) - - zone->zone_start_pfn; - - zone_span_writeunlock(zone); -} - -static void resize_zone(struct zone *zone, unsigned long start_pfn, - unsigned long end_pfn) -{ - zone_span_writelock(zone); - - if (end_pfn - start_pfn) { - zone->zone_start_pfn = start_pfn; - zone->spanned_pages = end_pfn - start_pfn; - } else { - /* - * make it consist as free_area_init_core(), - * if spanned_pages = 0, then keep start_pfn = 0 - */ - zone->zone_start_pfn = 0; - zone->spanned_pages = 0; - } - - zone_span_writeunlock(zone); -} - -static void fix_zone_id(struct zone *zone, unsigned long start_pfn, - unsigned long end_pfn) -{ - enum zone_type zid = zone_idx(zone); - int nid = zone->zone_pgdat->node_id; - unsigned long pfn; - - for (pfn = start_pfn; pfn < end_pfn; pfn++) - set_page_links(pfn_to_page(pfn), zid, nid, pfn); -} - -static void __ref ensure_zone_is_initialized(struct zone *zone, - unsigned long start_pfn, unsigned long num_pages) -{ - if (zone_is_empty(zone)) - init_currently_empty_zone(zone, start_pfn, num_pages); -} - -static int __meminit move_pfn_range_left(struct zone *z1, struct zone *z2, - unsigned long start_pfn, unsigned long end_pfn) -{ - unsigned long flags; - unsigned long z1_start_pfn; - - ensure_zone_is_initialized(z1, start_pfn, end_pfn - start_pfn); - - pgdat_resize_lock(z1->zone_pgdat, &flags); - - /* can't move pfns which are higher than @z2 */ - if (end_pfn > zone_end_pfn(z2)) - goto out_fail; - /* the move out part must be at the left most of @z2 */ - if (start_pfn > z2->zone_start_pfn) - goto out_fail; - /* must included/overlap */ - if (end_pfn <= z2->zone_start_pfn) - goto out_fail; - - /* use start_pfn for z1's start_pfn if z1 is empty */ - if (!zone_is_empty(z1)) - z1_start_pfn = z1->zone_start_pfn; - else - z1_start_pfn = start_pfn; - - resize_zone(z1, z1_start_pfn, end_pfn); - resize_zone(z2, end_pfn, zone_end_pfn(z2)); - - pgdat_resize_unlock(z1->zone_pgdat, &flags); - - fix_zone_id(z1, start_pfn, end_pfn); - - return 0; -out_fail: - pgdat_resize_unlock(z1->zone_pgdat, &flags); - return -1; -} - -static int __meminit move_pfn_range_right(struct zone *z1, struct zone *z2, - unsigned long start_pfn, unsigned long end_pfn) -{ - unsigned long flags; - unsigned long z2_end_pfn; - - ensure_zone_is_initialized(z2, start_pfn, end_pfn - start_pfn); - - pgdat_resize_lock(z1->zone_pgdat, &flags); - - /* can't move pfns which are lower than @z1 */ - if (z1->zone_start_pfn > start_pfn) - goto out_fail; - /* the move out part mast at the right most of @z1 */ - if (zone_end_pfn(z1) > end_pfn) - goto out_fail; - /* must included/overlap */ - if (start_pfn >= zone_end_pfn(z1)) - goto out_fail; - - /* use end_pfn for z2's end_pfn if z2 is empty */ - if (!zone_is_empty(z2)) - z2_end_pfn = zone_end_pfn(z2); - else - z2_end_pfn = end_pfn; - - resize_zone(z1, z1->zone_start_pfn, start_pfn); - resize_zone(z2, start_pfn, z2_end_pfn); - - pgdat_resize_unlock(z1->zone_pgdat, &flags); - - fix_zone_id(z2, start_pfn, end_pfn); - - return 0; -out_fail: - pgdat_resize_unlock(z1->zone_pgdat, &flags); - return -1; -} - -static void __meminit grow_pgdat_span(struct pglist_data *pgdat, unsigned long start_pfn, - unsigned long end_pfn) -{ - unsigned long old_pgdat_end_pfn = pgdat_end_pfn(pgdat); - - if (!pgdat->node_spanned_pages || start_pfn < pgdat->node_start_pfn) - pgdat->node_start_pfn = start_pfn; - - pgdat->node_spanned_pages = max(old_pgdat_end_pfn, end_pfn) - - pgdat->node_start_pfn; -} - -static int __meminit __add_zone(struct zone *zone, unsigned long phys_start_pfn) -{ - struct pglist_data *pgdat = zone->zone_pgdat; - int nr_pages = PAGES_PER_SECTION; - int nid = pgdat->node_id; - int zone_type; - unsigned long flags, pfn; - - zone_type = zone - pgdat->node_zones; - ensure_zone_is_initialized(zone, phys_start_pfn, nr_pages); - - pgdat_resize_lock(zone->zone_pgdat, &flags); - grow_zone_span(zone, phys_start_pfn, phys_start_pfn + nr_pages); - grow_pgdat_span(zone->zone_pgdat, phys_start_pfn, - phys_start_pfn + nr_pages); - pgdat_resize_unlock(zone->zone_pgdat, &flags); - memmap_init_zone(nr_pages, nid, zone_type, - phys_start_pfn, MEMMAP_HOTPLUG); - - /* online_page_range is called later and expects pages reserved */ - for (pfn = phys_start_pfn; pfn < phys_start_pfn + nr_pages; pfn++) { - if (!pfn_valid(pfn)) - continue; - - SetPageReserved(pfn_to_page(pfn)); - } - return 0; -} - static int __meminit __add_section(int nid, unsigned long phys_start_pfn) { int ret; @@ -1332,39 +1158,6 @@ static int check_hotplug_memory_range(u64 start, u64 size) return 0; } -/* - * If movable zone has already been setup, newly added memory should be check. - * If its address is higher than movable zone, it should be added as movable. - * Without this check, movable zone may overlap with other zone. - */ -static int should_add_memory_movable(int nid, u64 start, u64 size) -{ - unsigned long start_pfn = start >> PAGE_SHIFT; - pg_data_t *pgdat = NODE_DATA(nid); - struct zone *movable_zone = pgdat->node_zones + ZONE_MOVABLE; - - if (zone_is_empty(movable_zone)) - return 0; - - if (movable_zone->zone_start_pfn <= start_pfn) - return 1; - - return 0; -} - -int zone_for_memory(int nid, u64 start, u64 size, int zone_default, - bool for_device) -{ -#ifdef CONFIG_ZONE_DEVICE - if (for_device) - return ZONE_DEVICE; -#endif - if (should_add_memory_movable(nid, start, size)) - return ZONE_MOVABLE; - - return zone_default; -} - static int online_memory_block(struct memory_block *mem, void *arg) { return device_online(&mem->dev); @@ -1410,7 +1203,7 @@ int __ref add_memory_resource(int nid, struct resource *res, bool online) } /* call arch's memory hotadd */ - ret = arch_add_memory(nid, start, size, false); + ret = arch_add_memory(nid, start, size); if (ret < 0) goto error; -- 2.11.0 -- Michal Hocko SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. 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