diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-08-07 11:39:33 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-08-07 11:39:33 -0700 |
commit | 81e11336d97e7a4c25a65c302ef2bf9cd9808ed4 (patch) | |
tree | 44e069e0bb26068137a1bda7ca5125c5b068b4ab /include | |
parent | 5631c5e0eb9035d92ceb20fcd9cdb7779a3f5cc7 (diff) | |
parent | 912c05720f00d039103d356a59c37dc7c3995e01 (diff) |
Merge branch 'akpm' (patches from Andrew)
Merge misc updates from Andrew Morton:
- a few MM hotfixes
- kthread, tools, scripts, ntfs and ocfs2
- some of MM
Subsystems affected by this patch series: kthread, tools, scripts, ntfs,
ocfs2 and mm (hofixes, pagealloc, slab-generic, slab, slub, kcsan,
debug, pagecache, gup, swap, shmem, memcg, pagemap, mremap, mincore,
sparsemem, vmalloc, kasan, pagealloc, hugetlb and vmscan).
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (162 commits)
mm: vmscan: consistent update to pgrefill
mm/vmscan.c: fix typo
khugepaged: khugepaged_test_exit() check mmget_still_valid()
khugepaged: retract_page_tables() remember to test exit
khugepaged: collapse_pte_mapped_thp() protect the pmd lock
khugepaged: collapse_pte_mapped_thp() flush the right range
mm/hugetlb: fix calculation of adjust_range_if_pmd_sharing_possible
mm: thp: replace HTTP links with HTTPS ones
mm/page_alloc: fix memalloc_nocma_{save/restore} APIs
mm/page_alloc.c: skip setting nodemask when we are in interrupt
mm/page_alloc: fallbacks at most has 3 elements
mm/page_alloc: silence a KASAN false positive
mm/page_alloc.c: remove unnecessary end_bitidx for [set|get]_pfnblock_flags_mask()
mm/page_alloc.c: simplify pageblock bitmap access
mm/page_alloc.c: extract the common part in pfn_to_bitidx()
mm/page_alloc.c: replace the definition of NR_MIGRATETYPE_BITS with PB_migratetype_bits
mm/shuffle: remove dynamic reconfiguration
mm/memory_hotplug: document why shuffle_zone() is relevant
mm/page_alloc: remove nr_free_pagecache_pages()
mm: remove vm_total_pages
...
Diffstat (limited to 'include')
28 files changed, 419 insertions, 170 deletions
diff --git a/include/asm-generic/pgalloc.h b/include/asm-generic/pgalloc.h index 73f7421413cb..6f44810921aa 100644 --- a/include/asm-generic/pgalloc.h +++ b/include/asm-generic/pgalloc.h @@ -102,6 +102,86 @@ static inline void pte_free(struct mm_struct *mm, struct page *pte_page) __free_page(pte_page); } + +#if CONFIG_PGTABLE_LEVELS > 2 + +#ifndef __HAVE_ARCH_PMD_ALLOC_ONE +/** + * pmd_alloc_one - allocate a page for PMD-level page table + * @mm: the mm_struct of the current context + * + * Allocates a page and runs the pgtable_pmd_page_ctor(). + * Allocations use %GFP_PGTABLE_USER in user context and + * %GFP_PGTABLE_KERNEL in kernel context. + * + * Return: pointer to the allocated memory or %NULL on error + */ +static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) +{ + struct page *page; + gfp_t gfp = GFP_PGTABLE_USER; + + if (mm == &init_mm) + gfp = GFP_PGTABLE_KERNEL; + page = alloc_pages(gfp, 0); + if (!page) + return NULL; + if (!pgtable_pmd_page_ctor(page)) { + __free_pages(page, 0); + return NULL; + } + return (pmd_t *)page_address(page); +} +#endif + +#ifndef __HAVE_ARCH_PMD_FREE +static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) +{ + BUG_ON((unsigned long)pmd & (PAGE_SIZE-1)); + pgtable_pmd_page_dtor(virt_to_page(pmd)); + free_page((unsigned long)pmd); +} +#endif + +#endif /* CONFIG_PGTABLE_LEVELS > 2 */ + +#if CONFIG_PGTABLE_LEVELS > 3 + +#ifndef __HAVE_ARCH_PUD_FREE +/** + * pud_alloc_one - allocate a page for PUD-level page table + * @mm: the mm_struct of the current context + * + * Allocates a page using %GFP_PGTABLE_USER for user context and + * %GFP_PGTABLE_KERNEL for kernel context. + * + * Return: pointer to the allocated memory or %NULL on error + */ +static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) +{ + gfp_t gfp = GFP_PGTABLE_USER; + + if (mm == &init_mm) + gfp = GFP_PGTABLE_KERNEL; + return (pud_t *)get_zeroed_page(gfp); +} +#endif + +static inline void pud_free(struct mm_struct *mm, pud_t *pud) +{ + BUG_ON((unsigned long)pud & (PAGE_SIZE-1)); + free_page((unsigned long)pud); +} + +#endif /* CONFIG_PGTABLE_LEVELS > 3 */ + +#ifndef __HAVE_ARCH_PGD_FREE +static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) +{ + free_page((unsigned long)pgd); +} +#endif + #endif /* CONFIG_MMU */ #endif /* __ASM_GENERIC_PGALLOC_H */ diff --git a/include/asm-generic/tlb.h b/include/asm-generic/tlb.h index ef75ec86f865..6661ee1cff47 100644 --- a/include/asm-generic/tlb.h +++ b/include/asm-generic/tlb.h @@ -14,7 +14,6 @@ #include <linux/mmu_notifier.h> #include <linux/swap.h> #include <linux/hugetlb_inline.h> -#include <asm/pgalloc.h> #include <asm/tlbflush.h> #include <asm/cacheflush.h> diff --git a/include/crypto/aead.h b/include/crypto/aead.h index 62c68550aab6..c32a6f5664e9 100644 --- a/include/crypto/aead.h +++ b/include/crypto/aead.h @@ -425,7 +425,7 @@ static inline struct aead_request *aead_request_alloc(struct crypto_aead *tfm, */ static inline void aead_request_free(struct aead_request *req) { - kzfree(req); + kfree_sensitive(req); } /** diff --git a/include/crypto/akcipher.h b/include/crypto/akcipher.h index 6924b091adec..1d3aa252caba 100644 --- a/include/crypto/akcipher.h +++ b/include/crypto/akcipher.h @@ -207,7 +207,7 @@ static inline struct akcipher_request *akcipher_request_alloc( */ static inline void akcipher_request_free(struct akcipher_request *req) { - kzfree(req); + kfree_sensitive(req); } /** diff --git a/include/crypto/gf128mul.h b/include/crypto/gf128mul.h index fa0a63d298dc..81330c6446f6 100644 --- a/include/crypto/gf128mul.h +++ b/include/crypto/gf128mul.h @@ -230,7 +230,7 @@ void gf128mul_4k_bbe(be128 *a, const struct gf128mul_4k *t); void gf128mul_x8_ble(le128 *r, const le128 *x); static inline void gf128mul_free_4k(struct gf128mul_4k *t) { - kzfree(t); + kfree_sensitive(t); } diff --git a/include/crypto/hash.h b/include/crypto/hash.h index 19ce91f2359f..0d1b403888c9 100644 --- a/include/crypto/hash.h +++ b/include/crypto/hash.h @@ -606,7 +606,7 @@ static inline struct ahash_request *ahash_request_alloc( */ static inline void ahash_request_free(struct ahash_request *req) { - kzfree(req); + kfree_sensitive(req); } static inline void ahash_request_zero(struct ahash_request *req) diff --git a/include/crypto/internal/acompress.h b/include/crypto/internal/acompress.h index cf478681b53e..cfc47e18820f 100644 --- a/include/crypto/internal/acompress.h +++ b/include/crypto/internal/acompress.h @@ -46,7 +46,7 @@ static inline struct acomp_req *__acomp_request_alloc(struct crypto_acomp *tfm) static inline void __acomp_request_free(struct acomp_req *req) { - kzfree(req); + kfree_sensitive(req); } /** diff --git a/include/crypto/kpp.h b/include/crypto/kpp.h index cd9a9b500624..88b591215d5c 100644 --- a/include/crypto/kpp.h +++ b/include/crypto/kpp.h @@ -187,7 +187,7 @@ static inline struct kpp_request *kpp_request_alloc(struct crypto_kpp *tfm, */ static inline void kpp_request_free(struct kpp_request *req) { - kzfree(req); + kfree_sensitive(req); } /** diff --git a/include/crypto/skcipher.h b/include/crypto/skcipher.h index 5663f71198b3..6a733b171a5d 100644 --- a/include/crypto/skcipher.h +++ b/include/crypto/skcipher.h @@ -508,7 +508,7 @@ static inline struct skcipher_request *skcipher_request_alloc( */ static inline void skcipher_request_free(struct skcipher_request *req) { - kzfree(req); + kfree_sensitive(req); } static inline void skcipher_request_zero(struct skcipher_request *req) diff --git a/include/linux/efi.h b/include/linux/efi.h index 05c47f857383..73db1ae04cef 100644 --- a/include/linux/efi.h +++ b/include/linux/efi.h @@ -606,7 +606,11 @@ extern void *efi_get_pal_addr (void); extern void efi_map_pal_code (void); extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg); extern void efi_gettimeofday (struct timespec64 *ts); +#ifdef CONFIG_EFI extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */ +#else +static inline void efi_enter_virtual_mode (void) {} +#endif #ifdef CONFIG_X86 extern efi_status_t efi_query_variable_store(u32 attributes, unsigned long size, diff --git a/include/linux/fs.h b/include/linux/fs.h index 6d1976916635..2df72def1f59 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -528,7 +528,7 @@ static inline int mapping_mapped(struct address_space *mapping) /* * Might pages of this file have been modified in userspace? - * Note that i_mmap_writable counts all VM_SHARED vmas: do_mmap_pgoff + * Note that i_mmap_writable counts all VM_SHARED vmas: do_mmap * marks vma as VM_SHARED if it is shared, and the file was opened for * writing i.e. vma may be mprotected writable even if now readonly. * @@ -2950,6 +2950,21 @@ extern void discard_new_inode(struct inode *); extern unsigned int get_next_ino(void); extern void evict_inodes(struct super_block *sb); +/* + * Userspace may rely on the the inode number being non-zero. For example, glibc + * simply ignores files with zero i_ino in unlink() and other places. + * + * As an additional complication, if userspace was compiled with + * _FILE_OFFSET_BITS=32 on a 64-bit kernel we'll only end up reading out the + * lower 32 bits, so we need to check that those aren't zero explicitly. With + * _FILE_OFFSET_BITS=64, this may cause some harmless false-negatives, but + * better safe than sorry. + */ +static inline bool is_zero_ino(ino_t ino) +{ + return (u32)ino == 0; +} + extern void __iget(struct inode * inode); extern void iget_failed(struct inode *); extern void clear_inode(struct inode *); diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h index 71f20776b06c..17c4c4975145 100644 --- a/include/linux/huge_mm.h +++ b/include/linux/huge_mm.h @@ -42,7 +42,7 @@ extern int mincore_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, unsigned long addr, unsigned long end, unsigned char *vec); extern bool move_huge_pmd(struct vm_area_struct *vma, unsigned long old_addr, - unsigned long new_addr, unsigned long old_end, + unsigned long new_addr, pmd_t *old_pmd, pmd_t *new_pmd); extern int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, unsigned long addr, pgprot_t newprot, diff --git a/include/linux/kasan.h b/include/linux/kasan.h index 82522e996c76..087fba34b209 100644 --- a/include/linux/kasan.h +++ b/include/linux/kasan.h @@ -38,7 +38,6 @@ extern void kasan_disable_current(void); void kasan_unpoison_shadow(const void *address, size_t size); void kasan_unpoison_task_stack(struct task_struct *task); -void kasan_unpoison_stack_above_sp_to(const void *watermark); void kasan_alloc_pages(struct page *page, unsigned int order); void kasan_free_pages(struct page *page, unsigned int order); @@ -101,7 +100,6 @@ void kasan_restore_multi_shot(bool enabled); static inline void kasan_unpoison_shadow(const void *address, size_t size) {} static inline void kasan_unpoison_task_stack(struct task_struct *task) {} -static inline void kasan_unpoison_stack_above_sp_to(const void *watermark) {} static inline void kasan_enable_current(void) {} static inline void kasan_disable_current(void) {} @@ -174,11 +172,13 @@ static inline size_t kasan_metadata_size(struct kmem_cache *cache) { return 0; } void kasan_cache_shrink(struct kmem_cache *cache); void kasan_cache_shutdown(struct kmem_cache *cache); +void kasan_record_aux_stack(void *ptr); #else /* CONFIG_KASAN_GENERIC */ static inline void kasan_cache_shrink(struct kmem_cache *cache) {} static inline void kasan_cache_shutdown(struct kmem_cache *cache) {} +static inline void kasan_record_aux_stack(void *ptr) {} #endif /* CONFIG_KASAN_GENERIC */ diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index e77197a62809..1bb49b600310 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -23,6 +23,7 @@ #include <linux/page-flags.h> struct mem_cgroup; +struct obj_cgroup; struct page; struct mm_struct; struct kmem_cache; @@ -31,8 +32,6 @@ struct kmem_cache; enum memcg_stat_item { MEMCG_SWAP = NR_VM_NODE_STAT_ITEMS, MEMCG_SOCK, - /* XXX: why are these zone and not node counters? */ - MEMCG_KERNEL_STACK_KB, MEMCG_NR_STAT, }; @@ -48,12 +47,6 @@ enum memcg_memory_event { MEMCG_NR_MEMORY_EVENTS, }; -enum mem_cgroup_protection { - MEMCG_PROT_NONE, - MEMCG_PROT_LOW, - MEMCG_PROT_MIN, -}; - struct mem_cgroup_reclaim_cookie { pg_data_t *pgdat; unsigned int generation; @@ -193,6 +186,22 @@ struct memcg_cgwb_frn { }; /* + * Bucket for arbitrarily byte-sized objects charged to a memory + * cgroup. The bucket can be reparented in one piece when the cgroup + * is destroyed, without having to round up the individual references + * of all live memory objects in the wild. + */ +struct obj_cgroup { + struct percpu_ref refcnt; + struct mem_cgroup *memcg; + atomic_t nr_charged_bytes; + union { + struct list_head list; + struct rcu_head rcu; + }; +}; + +/* * The memory controller data structure. The memory controller controls both * page cache and RSS per cgroup. We would eventually like to provide * statistics based on the statistics developed by Rik Van Riel for clock-pro, @@ -300,7 +309,8 @@ struct mem_cgroup { /* Index in the kmem_cache->memcg_params.memcg_caches array */ int kmemcg_id; enum memcg_kmem_state kmem_state; - struct list_head kmem_caches; + struct obj_cgroup __rcu *objcg; + struct list_head objcg_list; /* list of inherited objcgs */ #endif #ifdef CONFIG_CGROUP_WRITEBACK @@ -339,12 +349,49 @@ static inline bool mem_cgroup_disabled(void) return !cgroup_subsys_enabled(memory_cgrp_subsys); } -static inline unsigned long mem_cgroup_protection(struct mem_cgroup *memcg, +static inline unsigned long mem_cgroup_protection(struct mem_cgroup *root, + struct mem_cgroup *memcg, bool in_low_reclaim) { if (mem_cgroup_disabled()) return 0; + /* + * There is no reclaim protection applied to a targeted reclaim. + * We are special casing this specific case here because + * mem_cgroup_protected calculation is not robust enough to keep + * the protection invariant for calculated effective values for + * parallel reclaimers with different reclaim target. This is + * especially a problem for tail memcgs (as they have pages on LRU) + * which would want to have effective values 0 for targeted reclaim + * but a different value for external reclaim. + * + * Example + * Let's have global and A's reclaim in parallel: + * | + * A (low=2G, usage = 3G, max = 3G, children_low_usage = 1.5G) + * |\ + * | C (low = 1G, usage = 2.5G) + * B (low = 1G, usage = 0.5G) + * + * For the global reclaim + * A.elow = A.low + * B.elow = min(B.usage, B.low) because children_low_usage <= A.elow + * C.elow = min(C.usage, C.low) + * + * With the effective values resetting we have A reclaim + * A.elow = 0 + * B.elow = B.low + * C.elow = C.low + * + * If the global reclaim races with A's reclaim then + * B.elow = C.elow = 0 because children_low_usage > A.elow) + * is possible and reclaiming B would be violating the protection. + * + */ + if (root == memcg) + return 0; + if (in_low_reclaim) return READ_ONCE(memcg->memory.emin); @@ -352,8 +399,36 @@ static inline unsigned long mem_cgroup_protection(struct mem_cgroup *memcg, READ_ONCE(memcg->memory.elow)); } -enum mem_cgroup_protection mem_cgroup_protected(struct mem_cgroup *root, - struct mem_cgroup *memcg); +void mem_cgroup_calculate_protection(struct mem_cgroup *root, + struct mem_cgroup *memcg); + +static inline bool mem_cgroup_supports_protection(struct mem_cgroup *memcg) +{ + /* + * The root memcg doesn't account charges, and doesn't support + * protection. + */ + return !mem_cgroup_disabled() && !mem_cgroup_is_root(memcg); + +} + +static inline bool mem_cgroup_below_low(struct mem_cgroup *memcg) +{ + if (!mem_cgroup_supports_protection(memcg)) + return false; + + return READ_ONCE(memcg->memory.elow) >= + page_counter_read(&memcg->memory); +} + +static inline bool mem_cgroup_below_min(struct mem_cgroup *memcg) +{ + if (!mem_cgroup_supports_protection(memcg)) + return false; + + return READ_ONCE(memcg->memory.emin) >= + page_counter_read(&memcg->memory); +} int mem_cgroup_charge(struct page *page, struct mm_struct *mm, gfp_t gfp_mask); @@ -416,6 +491,33 @@ struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){ return css ? container_of(css, struct mem_cgroup, css) : NULL; } +static inline bool obj_cgroup_tryget(struct obj_cgroup *objcg) +{ + return percpu_ref_tryget(&objcg->refcnt); +} + +static inline void obj_cgroup_get(struct obj_cgroup *objcg) +{ + percpu_ref_get(&objcg->refcnt); +} + +static inline void obj_cgroup_put(struct obj_cgroup *objcg) +{ + percpu_ref_put(&objcg->refcnt); +} + +/* + * After the initialization objcg->memcg is always pointing at + * a valid memcg, but can be atomically swapped to the parent memcg. + * + * The caller must ensure that the returned memcg won't be released: + * e.g. acquire the rcu_read_lock or css_set_lock. + */ +static inline struct mem_cgroup *obj_cgroup_memcg(struct obj_cgroup *objcg) +{ + return READ_ONCE(objcg->memcg); +} + static inline void mem_cgroup_put(struct mem_cgroup *memcg) { if (memcg) @@ -679,11 +781,34 @@ static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, return x; } +void __mod_memcg_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx, + int val); void __mod_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx, int val); void __mod_lruvec_slab_state(void *p, enum node_stat_item idx, int val); + void mod_memcg_obj_state(void *p, int idx, int val); +static inline void mod_lruvec_slab_state(void *p, enum node_stat_item idx, + int val) +{ + unsigned long flags; + + local_irq_save(flags); + __mod_lruvec_slab_state(p, idx, val); + local_irq_restore(flags); +} + +static inline void mod_memcg_lruvec_state(struct lruvec *lruvec, + enum node_stat_item idx, int val) +{ + unsigned long flags; + + local_irq_save(flags); + __mod_memcg_lruvec_state(lruvec, idx, val); + local_irq_restore(flags); +} + static inline void mod_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx, int val) { @@ -825,16 +950,26 @@ static inline void memcg_memory_event_mm(struct mm_struct *mm, { } -static inline unsigned long mem_cgroup_protection(struct mem_cgroup *memcg, +static inline unsigned long mem_cgroup_protection(struct mem_cgroup *root, + struct mem_cgroup *memcg, bool in_low_reclaim) { return 0; } -static inline enum mem_cgroup_protection mem_cgroup_protected( - struct mem_cgroup *root, struct mem_cgroup *memcg) +static inline void mem_cgroup_calculate_protection(struct mem_cgroup *root, + struct mem_cgroup *memcg) +{ +} + +static inline bool mem_cgroup_below_low(struct mem_cgroup *memcg) +{ + return false; +} + +static inline bool mem_cgroup_below_min(struct mem_cgroup *memcg) { - return MEMCG_PROT_NONE; + return false; } static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm, @@ -1057,6 +1192,11 @@ static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, return node_page_state(lruvec_pgdat(lruvec), idx); } +static inline void __mod_memcg_lruvec_state(struct lruvec *lruvec, + enum node_stat_item idx, int val) +{ +} + static inline void __mod_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx, int val) { @@ -1089,6 +1229,14 @@ static inline void __mod_lruvec_slab_state(void *p, enum node_stat_item idx, __mod_node_page_state(page_pgdat(page), idx, val); } +static inline void mod_lruvec_slab_state(void *p, enum node_stat_item idx, + int val) +{ + struct page *page = virt_to_head_page(p); + + mod_node_page_state(page_pgdat(page), idx, val); +} + static inline void mod_memcg_obj_state(void *p, int idx, int val) { } @@ -1341,9 +1489,6 @@ static inline void memcg_set_shrinker_bit(struct mem_cgroup *memcg, } #endif -struct kmem_cache *memcg_kmem_get_cache(struct kmem_cache *cachep); -void memcg_kmem_put_cache(struct kmem_cache *cachep); - #ifdef CONFIG_MEMCG_KMEM int __memcg_kmem_charge(struct mem_cgroup *memcg, gfp_t gfp, unsigned int nr_pages); @@ -1351,8 +1496,12 @@ void __memcg_kmem_uncharge(struct mem_cgroup *memcg, unsigned int nr_pages); int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, int order); void __memcg_kmem_uncharge_page(struct page *page, int order); +struct obj_cgroup *get_obj_cgroup_from_current(void); + +int obj_cgroup_charge(struct obj_cgroup *objcg, gfp_t gfp, size_t size); +void obj_cgroup_uncharge(struct obj_cgroup *objcg, size_t size); + extern struct static_key_false memcg_kmem_enabled_key; -extern struct workqueue_struct *memcg_kmem_cache_wq; extern int memcg_nr_cache_ids; void memcg_get_cache_ids(void); @@ -1368,7 +1517,19 @@ void memcg_put_cache_ids(void); static inline bool memcg_kmem_enabled(void) { - return static_branch_unlikely(&memcg_kmem_enabled_key); + return static_branch_likely(&memcg_kmem_enabled_key); +} + +static inline bool memcg_kmem_bypass(void) +{ + if (in_interrupt()) + return true; + + /* Allow remote memcg charging in kthread contexts. */ + if ((!current->mm || (current->flags & PF_KTHREAD)) && + !current->active_memcg) + return true; + return false; } static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, diff --git a/include/linux/mm.h b/include/linux/mm.h index 6c8333d6c991..f6a82f9bccd7 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -206,6 +206,8 @@ int overcommit_ratio_handler(struct ctl_table *, int, void *, size_t *, loff_t *); int overcommit_kbytes_handler(struct ctl_table *, int, void *, size_t *, loff_t *); +int overcommit_policy_handler(struct ctl_table *, int, void *, size_t *, + loff_t *); #define nth_page(page,n) pfn_to_page(page_to_pfn((page)) + (n)) @@ -777,6 +779,11 @@ static inline void *kvcalloc(size_t n, size_t size, gfp_t flags) extern void kvfree(const void *addr); extern void kvfree_sensitive(const void *addr, size_t len); +static inline int head_mapcount(struct page *head) +{ + return atomic_read(compound_mapcount_ptr(head)) + 1; +} + /* * Mapcount of compound page as a whole, does not include mapped sub-pages. * @@ -786,7 +793,7 @@ static inline int compound_mapcount(struct page *page) { VM_BUG_ON_PAGE(!PageCompound(page), page); page = compound_head(page); - return atomic_read(compound_mapcount_ptr(page)) + 1; + return head_mapcount(page); } /* @@ -899,11 +906,16 @@ static inline bool hpage_pincount_available(struct page *page) return PageCompound(page) && compound_order(page) > 1; } +static inline int head_pincount(struct page *head) +{ + return atomic_read(compound_pincount_ptr(head)); +} + static inline int compound_pincount(struct page *page) { VM_BUG_ON_PAGE(!hpage_pincount_available(page), page); page = compound_head(page); - return atomic_read(compound_pincount_ptr(page)); + return head_pincount(page); } static inline void set_compound_order(struct page *page, unsigned int order) @@ -2091,51 +2103,11 @@ static inline pud_t *pud_alloc(struct mm_struct *mm, p4d_t *p4d, NULL : pud_offset(p4d, address); } -static inline p4d_t *p4d_alloc_track(struct mm_struct *mm, pgd_t *pgd, - unsigned long address, - pgtbl_mod_mask *mod_mask) - -{ - if (unlikely(pgd_none(*pgd))) { - if (__p4d_alloc(mm, pgd, address)) - return NULL; - *mod_mask |= PGTBL_PGD_MODIFIED; - } - - return p4d_offset(pgd, address); -} - -static inline pud_t *pud_alloc_track(struct mm_struct *mm, p4d_t *p4d, - unsigned long address, - pgtbl_mod_mask *mod_mask) -{ - if (unlikely(p4d_none(*p4d))) { - if (__pud_alloc(mm, p4d, address)) - return NULL; - *mod_mask |= PGTBL_P4D_MODIFIED; - } - - return pud_offset(p4d, address); -} - static inline pmd_t *pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long address) { return (unlikely(pud_none(*pud)) && __pmd_alloc(mm, pud, address))? NULL: pmd_offset(pud, address); } - -static inline pmd_t *pmd_alloc_track(struct mm_struct *mm, pud_t *pud, - unsigned long address, - pgtbl_mod_mask *mod_mask) -{ - if (unlikely(pud_none(*pud))) { - if (__pmd_alloc(mm, pud, address)) - return NULL; - *mod_mask |= PGTBL_PUD_MODIFIED; - } - - return pmd_offset(pud, address); -} #endif /* CONFIG_MMU */ #if USE_SPLIT_PTE_PTLOCKS @@ -2251,11 +2223,6 @@ static inline void pgtable_pte_page_dtor(struct page *page) ((unlikely(pmd_none(*(pmd))) && __pte_alloc_kernel(pmd))? \ NULL: pte_offset_kernel(pmd, address)) -#define pte_alloc_kernel_track(pmd, address, mask) \ - ((unlikely(pmd_none(*(pmd))) && \ - (__pte_alloc_kernel(pmd) || ({*(mask)|=PGTBL_PMD_MODIFIED;0;})))?\ - NULL: pte_offset_kernel(pmd, address)) - #if USE_SPLIT_PMD_PTLOCKS static struct page *pmd_to_page(pmd_t *pmd) @@ -2413,9 +2380,6 @@ static inline unsigned long get_num_physpages(void) * for_each_valid_physical_page_range() * memblock_add_node(base, size, nid) * free_area_init(max_zone_pfns); - * - * sparse_memory_present_with_active_regions() calls memory_present() for - * each range when SPARSEMEM is enabled. */ void free_area_init(unsigned long *max_zone_pfn); unsigned long node_map_pfn_alignment(void); @@ -2426,7 +2390,6 @@ extern unsigned long absent_pages_in_range(unsigned long start_pfn, extern void get_pfn_range_for_nid(unsigned int nid, unsigned long *start_pfn, unsigned long *end_pfn); extern unsigned long find_min_pfn_with_active_regions(void); -extern void sparse_memory_present_with_active_regions(int nid); #ifndef CONFIG_NEED_MULTIPLE_NODES static inline int early_pfn_to_nid(unsigned long pfn) @@ -2577,23 +2540,13 @@ extern unsigned long mmap_region(struct file *file, unsigned long addr, struct list_head *uf); extern unsigned long do_mmap(struct file *file, unsigned long addr, unsigned long len, unsigned long prot, unsigned long flags, - vm_flags_t vm_flags, unsigned long pgoff, unsigned long *populate, - struct list_head *uf); + unsigned long pgoff, unsigned long *populate, struct list_head *uf); extern int __do_munmap(struct mm_struct *, unsigned long, size_t, struct list_head *uf, bool downgrade); extern int do_munmap(struct mm_struct *, unsigned long, size_t, struct list_head *uf); extern int do_madvise(unsigned long start, size_t len_in, int behavior); -static inline unsigned long -do_mmap_pgoff(struct file *file, unsigned long addr, - unsigned long len, unsigned long prot, unsigned long flags, - unsigned long pgoff, unsigned long *populate, - struct list_head *uf) -{ - return do_mmap(file, addr, len, prot, flags, 0, pgoff, populate, uf); -} - #ifdef CONFIG_MMU extern int __mm_populate(unsigned long addr, unsigned long len, int ignore_errors); @@ -3009,14 +2962,15 @@ pgd_t *vmemmap_pgd_populate(unsigned long addr, int node); p4d_t *vmemmap_p4d_populate(pgd_t *pgd, unsigned long addr, int node); pud_t *vmemmap_pud_populate(p4d_t *p4d, unsigned long addr, int node); pmd_t *vmemmap_pmd_populate(pud_t *pud, unsigned long addr, int node); -pte_t *vmemmap_pte_populate(pmd_t *pmd, unsigned long addr, int node); +pte_t *vmemmap_pte_populate(pmd_t *pmd, unsigned long addr, int node, + struct vmem_altmap *altmap); void *vmemmap_alloc_block(unsigned long size, int node); struct vmem_altmap; -void *vmemmap_alloc_block_buf(unsigned long size, int node); -void *altmap_alloc_block_buf(unsigned long size, struct vmem_altmap *altmap); +void *vmemmap_alloc_block_buf(unsigned long size, int node, + struct vmem_altmap *altmap); void vmemmap_verify(pte_t *, int, unsigned long, unsigned long); int vmemmap_populate_basepages(unsigned long start, unsigned long end, - int node); + int node, struct vmem_altmap *altmap); int vmemmap_populate(unsigned long start, unsigned long end, int node, struct vmem_altmap *altmap); void vmemmap_populate_print_last(void); diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index 64ede5f150dc..0277fbab7c93 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -198,7 +198,10 @@ struct page { atomic_t _refcount; |