X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=mm%2Fpage_alloc.c;h=f9b5d6d5f4d6cf7643d1c6f39b1d112e8bd18c33;hb=9a9136e270af14da506f66bcafcc506b86a86498;hp=d461b23a27a1176decc9229edf45c8ae1c388472;hpb=59b8175c771040afcd4ad67022b0cc80c216b866;p=powerpc.git diff --git a/mm/page_alloc.c b/mm/page_alloc.c index d461b23a27..f9b5d6d5f4 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -103,7 +103,7 @@ int min_free_kbytes = 1024; unsigned long __meminitdata nr_kernel_pages; unsigned long __meminitdata nr_all_pages; -static unsigned long __initdata dma_reserve; +static unsigned long __meminitdata dma_reserve; #ifdef CONFIG_ARCH_POPULATES_NODE_MAP /* @@ -126,10 +126,10 @@ static unsigned long __initdata dma_reserve; #endif #endif - struct node_active_region __initdata early_node_map[MAX_ACTIVE_REGIONS]; - int __initdata nr_nodemap_entries; - unsigned long __initdata arch_zone_lowest_possible_pfn[MAX_NR_ZONES]; - unsigned long __initdata arch_zone_highest_possible_pfn[MAX_NR_ZONES]; + struct node_active_region __meminitdata early_node_map[MAX_ACTIVE_REGIONS]; + int __meminitdata nr_nodemap_entries; + unsigned long __meminitdata arch_zone_lowest_possible_pfn[MAX_NR_ZONES]; + unsigned long __meminitdata arch_zone_highest_possible_pfn[MAX_NR_ZONES]; #ifdef CONFIG_MEMORY_HOTPLUG_RESERVE unsigned long __initdata node_boundary_start_pfn[MAX_NUMNODES]; unsigned long __initdata node_boundary_end_pfn[MAX_NUMNODES]; @@ -156,10 +156,8 @@ static int page_outside_zone_boundaries(struct zone *zone, struct page *page) static int page_is_consistent(struct zone *zone, struct page *page) { -#ifdef CONFIG_HOLES_IN_ZONE - if (!pfn_valid(page_to_pfn(page))) + if (!pfn_valid_within(page_to_pfn(page))) return 0; -#endif if (zone != page_zone(page)) return 0; @@ -227,7 +225,7 @@ static void bad_page(struct page *page) static void free_compound_page(struct page *page) { - __free_pages_ok(page, (unsigned long)page[1].lru.prev); + __free_pages_ok(page, compound_order(page)); } static void prep_compound_page(struct page *page, unsigned long order) @@ -236,12 +234,13 @@ static void prep_compound_page(struct page *page, unsigned long order) int nr_pages = 1 << order; set_compound_page_dtor(page, free_compound_page); - page[1].lru.prev = (void *)order; - for (i = 0; i < nr_pages; i++) { + set_compound_order(page, order); + __SetPageHead(page); + for (i = 1; i < nr_pages; i++) { struct page *p = page + i; - __SetPageCompound(p); - set_page_private(p, (unsigned long)page); + __SetPageTail(p); + p->first_page = page; } } @@ -250,16 +249,19 @@ static void destroy_compound_page(struct page *page, unsigned long order) int i; int nr_pages = 1 << order; - if (unlikely((unsigned long)page[1].lru.prev != order)) + if (unlikely(compound_order(page) != order)) bad_page(page); - for (i = 0; i < nr_pages; i++) { + if (unlikely(!PageHead(page))) + bad_page(page); + __ClearPageHead(page); + for (i = 1; i < nr_pages; i++) { struct page *p = page + i; - if (unlikely(!PageCompound(p) | - (page_private(p) != (unsigned long)page))) + if (unlikely(!PageTail(p) | + (p->first_page != page))) bad_page(page); - __ClearPageCompound(p); + __ClearPageTail(p); } } @@ -346,10 +348,8 @@ __find_combined_index(unsigned long page_idx, unsigned int order) static inline int page_is_buddy(struct page *page, struct page *buddy, int order) { -#ifdef CONFIG_HOLES_IN_ZONE - if (!pfn_valid(page_to_pfn(buddy))) + if (!pfn_valid_within(page_to_pfn(buddy))) return 0; -#endif if (page_zone_id(page) != page_zone_id(buddy)) return 0; @@ -433,13 +433,18 @@ static inline int free_pages_check(struct page *page) 1 << PG_private | 1 << PG_locked | 1 << PG_active | - 1 << PG_reclaim | 1 << PG_slab | 1 << PG_swapcache | 1 << PG_writeback | 1 << PG_reserved | 1 << PG_buddy )))) bad_page(page); + /* + * PageReclaim == PageTail. It is only an error + * for PageReclaim to be set if PageCompound is clear. + */ + if (unlikely(!PageCompound(page) && PageReclaim(page))) + bad_page(page); if (PageDirty(page)) __ClearPageDirty(page); /* @@ -600,7 +605,7 @@ static int prep_new_page(struct page *page, int order, gfp_t gfp_flags) page->flags &= ~(1 << PG_uptodate | 1 << PG_error | 1 << PG_referenced | 1 << PG_arch_1 | - 1 << PG_checked | 1 << PG_mappedtodisk); + 1 << PG_owner_priv_1 | 1 << PG_mappedtodisk); set_page_private(page, 0); set_page_refcounted(page); @@ -664,45 +669,48 @@ static int rmqueue_bulk(struct zone *zone, unsigned int order, return i; } +#if MAX_NUMNODES > 1 +int nr_node_ids __read_mostly = MAX_NUMNODES; +EXPORT_SYMBOL(nr_node_ids); + +/* + * Figure out the number of possible node ids. + */ +static void __init setup_nr_node_ids(void) +{ + unsigned int node; + unsigned int highest = 0; + + for_each_node_mask(node, node_possible_map) + highest = node; + nr_node_ids = highest + 1; +} +#else +static void __init setup_nr_node_ids(void) {} +#endif + #ifdef CONFIG_NUMA /* - * Called from the slab reaper to drain pagesets on a particular node that - * belongs to the currently executing processor. + * Called from the vmstat counter updater to drain pagesets of this + * currently executing processor on remote nodes after they have + * expired. + * * Note that this function must be called with the thread pinned to * a single processor. */ -void drain_node_pages(int nodeid) +void drain_zone_pages(struct zone *zone, struct per_cpu_pages *pcp) { - int i; - enum zone_type z; unsigned long flags; + int to_drain; - for (z = 0; z < MAX_NR_ZONES; z++) { - struct zone *zone = NODE_DATA(nodeid)->node_zones + z; - struct per_cpu_pageset *pset; - - if (!populated_zone(zone)) - continue; - - pset = zone_pcp(zone, smp_processor_id()); - for (i = 0; i < ARRAY_SIZE(pset->pcp); i++) { - struct per_cpu_pages *pcp; - - pcp = &pset->pcp[i]; - if (pcp->count) { - int to_drain; - - local_irq_save(flags); - if (pcp->count >= pcp->batch) - to_drain = pcp->batch; - else - to_drain = pcp->count; - free_pages_bulk(zone, to_drain, &pcp->list, 0); - pcp->count -= to_drain; - local_irq_restore(flags); - } - } - } + local_irq_save(flags); + if (pcp->count >= pcp->batch) + to_drain = pcp->batch; + else + to_drain = pcp->count; + free_pages_bulk(zone, to_drain, &pcp->list, 0); + pcp->count -= to_drain; + local_irq_restore(flags); } #endif @@ -750,8 +758,8 @@ void mark_free_pages(struct zone *zone) if (pfn_valid(pfn)) { struct page *page = pfn_to_page(pfn); - if (!PageNosave(page)) - ClearPageNosaveFree(page); + if (!swsusp_page_is_forbidden(page)) + swsusp_unset_page_free(page); } for (order = MAX_ORDER - 1; order >= 0; --order) @@ -760,7 +768,7 @@ void mark_free_pages(struct zone *zone) pfn = page_to_pfn(list_entry(curr, struct page, lru)); for (i = 0; i < (1UL << order); i++) - SetPageNosaveFree(pfn_to_page(pfn + i)); + swsusp_set_page_free(pfn_to_page(pfn + i)); } spin_unlock_irqrestore(&zone->lock, flags); @@ -2123,11 +2131,14 @@ static int __cpuinit pageset_cpuup_callback(struct notifier_block *nfb, switch (action) { case CPU_UP_PREPARE: + case CPU_UP_PREPARE_FROZEN: if (process_zones(cpu)) ret = NOTIFY_BAD; break; case CPU_UP_CANCELED: + case CPU_UP_CANCELED_FROZEN: case CPU_DEAD: + case CPU_DEAD_FROZEN: free_zone_pagesets(cpu); break; default: @@ -2154,7 +2165,7 @@ void __init setup_per_cpu_pageset(void) #endif -static __meminit +static __meminit noinline int zone_wait_table_init(struct zone *zone, unsigned long zone_size_pages) { int i; @@ -2242,7 +2253,7 @@ __meminit int init_currently_empty_zone(struct zone *zone, * Basic iterator support. Return the first range of PFNs for a node * Note: nid == MAX_NUMNODES returns first region regardless of node */ -static int __init first_active_region_index_in_nid(int nid) +static int __meminit first_active_region_index_in_nid(int nid) { int i; @@ -2257,7 +2268,7 @@ static int __init first_active_region_index_in_nid(int nid) * Basic iterator support. Return the next active range of PFNs for a node * Note: nid == MAX_NUMNODES returns next region regardles of node */ -static int __init next_active_region_index_in_nid(int index, int nid) +static int __meminit next_active_region_index_in_nid(int index, int nid) { for (index = index + 1; index < nr_nodemap_entries; index++) if (nid == MAX_NUMNODES || early_node_map[index].nid == nid) @@ -2410,7 +2421,7 @@ static void __init account_node_boundary(unsigned int nid, * with no available memory, a warning is printed and the start and end * PFNs will be 0. */ -void __init get_pfn_range_for_nid(unsigned int nid, +void __meminit get_pfn_range_for_nid(unsigned int nid, unsigned long *start_pfn, unsigned long *end_pfn) { int i; @@ -2435,7 +2446,7 @@ void __init get_pfn_range_for_nid(unsigned int nid, * Return the number of pages a zone spans in a node, including holes * present_pages = zone_spanned_pages_in_node() - zone_absent_pages_in_node() */ -unsigned long __init zone_spanned_pages_in_node(int nid, +unsigned long __meminit zone_spanned_pages_in_node(int nid, unsigned long zone_type, unsigned long *ignored) { @@ -2463,7 +2474,7 @@ unsigned long __init zone_spanned_pages_in_node(int nid, * Return the number of holes in a range on a node. If nid is MAX_NUMNODES, * then all holes in the requested range will be accounted for. */ -unsigned long __init __absent_pages_in_range(int nid, +unsigned long __meminit __absent_pages_in_range(int nid, unsigned long range_start_pfn, unsigned long range_end_pfn) { @@ -2523,7 +2534,7 @@ unsigned long __init absent_pages_in_range(unsigned long start_pfn, } /* Return the number of page frames in holes in a zone on a node */ -unsigned long __init zone_absent_pages_in_node(int nid, +unsigned long __meminit zone_absent_pages_in_node(int nid, unsigned long zone_type, unsigned long *ignored) { @@ -2559,7 +2570,7 @@ static inline unsigned long zone_absent_pages_in_node(int nid, #endif -static void __init calculate_node_totalpages(struct pglist_data *pgdat, +static void __meminit calculate_node_totalpages(struct pglist_data *pgdat, unsigned long *zones_size, unsigned long *zholes_size) { unsigned long realtotalpages, totalpages = 0; @@ -2667,7 +2678,7 @@ static void __meminit free_area_init_core(struct pglist_data *pgdat, } } -static void __init alloc_node_mem_map(struct pglist_data *pgdat) +static void __meminit alloc_node_mem_map(struct pglist_data *pgdat) { /* Skip empty nodes */ if (!pgdat->node_spanned_pages) @@ -2944,6 +2955,7 @@ void __init free_area_init_nodes(unsigned long *max_zone_pfn) early_node_map[i].end_pfn); /* Initialise every node */ + setup_nr_node_ids(); for_each_online_node(nid) { pg_data_t *pgdat = NODE_DATA(nid); free_area_init_node(nid, pgdat, NULL, @@ -2986,7 +2998,7 @@ static int page_alloc_cpu_notify(struct notifier_block *self, { int cpu = (unsigned long)hcpu; - if (action == CPU_DEAD) { + if (action == CPU_DEAD || action == CPU_DEAD_FROZEN) { local_irq_disable(); __drain_pages(cpu); vm_events_fold_cpu(cpu); @@ -3182,7 +3194,8 @@ int min_free_kbytes_sysctl_handler(ctl_table *table, int write, struct file *file, void __user *buffer, size_t *length, loff_t *ppos) { proc_dointvec(table, write, file, buffer, length, ppos); - setup_per_zone_pages_min(); + if (write) + setup_per_zone_pages_min(); return 0; } @@ -3370,18 +3383,4 @@ EXPORT_SYMBOL(pfn_to_page); EXPORT_SYMBOL(page_to_pfn); #endif /* CONFIG_OUT_OF_LINE_PFN_TO_PAGE */ -#if MAX_NUMNODES > 1 -/* - * Find the highest possible node id. - */ -int highest_possible_node_id(void) -{ - unsigned int node; - unsigned int highest = 0; - for_each_node_mask(node, node_possible_map) - highest = node; - return highest; -} -EXPORT_SYMBOL(highest_possible_node_id); -#endif