]>
Commit | Line | Data |
---|---|---|
5b99cd0e HC |
1 | #ifndef _LINUX_MM_TYPES_H |
2 | #define _LINUX_MM_TYPES_H | |
3 | ||
4f9a58d7 | 4 | #include <linux/auxvec.h> |
5b99cd0e HC |
5 | #include <linux/types.h> |
6 | #include <linux/threads.h> | |
7 | #include <linux/list.h> | |
8 | #include <linux/spinlock.h> | |
c92ff1bd MS |
9 | #include <linux/prio_tree.h> |
10 | #include <linux/rbtree.h> | |
11 | #include <linux/rwsem.h> | |
12 | #include <linux/completion.h> | |
13 | #include <asm/page.h> | |
14 | #include <asm/mmu.h> | |
5b99cd0e | 15 | |
4f9a58d7 OH |
16 | #ifndef AT_VECTOR_SIZE_ARCH |
17 | #define AT_VECTOR_SIZE_ARCH 0 | |
18 | #endif | |
19 | #define AT_VECTOR_SIZE (2*(AT_VECTOR_SIZE_ARCH + AT_VECTOR_SIZE_BASE + 1)) | |
20 | ||
5b99cd0e HC |
21 | struct address_space; |
22 | ||
c92ff1bd MS |
23 | #if NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS |
24 | typedef atomic_long_t mm_counter_t; | |
25 | #else /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */ | |
26 | typedef unsigned long mm_counter_t; | |
27 | #endif /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */ | |
28 | ||
5b99cd0e HC |
29 | /* |
30 | * Each physical page in the system has a struct page associated with | |
31 | * it to keep track of whatever it is we are using the page for at the | |
32 | * moment. Note that we have no way to track which tasks are using | |
33 | * a page, though if it is a pagecache page, rmap structures can tell us | |
34 | * who is mapping it. | |
35 | */ | |
36 | struct page { | |
37 | unsigned long flags; /* Atomic flags, some possibly | |
38 | * updated asynchronously */ | |
39 | atomic_t _count; /* Usage count, see below. */ | |
81819f0f CL |
40 | union { |
41 | atomic_t _mapcount; /* Count of ptes mapped in mms, | |
5b99cd0e HC |
42 | * to show when page is mapped |
43 | * & limit reverse map searches. | |
44 | */ | |
b3fba8da | 45 | unsigned int inuse; /* SLUB: Nr of objects */ |
81819f0f | 46 | }; |
5b99cd0e HC |
47 | union { |
48 | struct { | |
49 | unsigned long private; /* Mapping-private opaque data: | |
50 | * usually used for buffer_heads | |
51 | * if PagePrivate set; used for | |
52 | * swp_entry_t if PageSwapCache; | |
53 | * indicates order in the buddy | |
54 | * system if PG_buddy is set. | |
55 | */ | |
56 | struct address_space *mapping; /* If low bit clear, points to | |
57 | * inode address_space, or NULL. | |
58 | * If page mapped as anonymous | |
59 | * memory, low bit is set, and | |
60 | * it points to anon_vma object: | |
61 | * see PAGE_MAPPING_ANON below. | |
62 | */ | |
63 | }; | |
64 | #if NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS | |
65 | spinlock_t ptl; | |
66 | #endif | |
a973e9dd | 67 | struct kmem_cache *slab; /* SLUB: Pointer to slab */ |
8e65d24c | 68 | struct page *first_page; /* Compound tail pages */ |
81819f0f CL |
69 | }; |
70 | union { | |
71 | pgoff_t index; /* Our offset within mapping. */ | |
894b8788 | 72 | void *freelist; /* SLUB: freelist req. slab lock */ |
5b99cd0e | 73 | }; |
5b99cd0e HC |
74 | struct list_head lru; /* Pageout list, eg. active_list |
75 | * protected by zone->lru_lock ! | |
76 | */ | |
77 | /* | |
78 | * On machines where all RAM is mapped into kernel address space, | |
79 | * we can simply calculate the virtual address. On machines with | |
80 | * highmem some memory is mapped into kernel virtual memory | |
81 | * dynamically, so we need a place to store that address. | |
82 | * Note that this field could be 16 bits on x86 ... ;) | |
83 | * | |
84 | * Architectures with slow multiplication can define | |
85 | * WANT_PAGE_VIRTUAL in asm/page.h | |
86 | */ | |
87 | #if defined(WANT_PAGE_VIRTUAL) | |
88 | void *virtual; /* Kernel virtual address (NULL if | |
89 | not kmapped, ie. highmem) */ | |
90 | #endif /* WANT_PAGE_VIRTUAL */ | |
78fb7466 PE |
91 | #ifdef CONFIG_CGROUP_MEM_CONT |
92 | unsigned long page_cgroup; | |
93 | #endif | |
5b99cd0e HC |
94 | }; |
95 | ||
c92ff1bd MS |
96 | /* |
97 | * This struct defines a memory VMM memory area. There is one of these | |
98 | * per VM-area/task. A VM area is any part of the process virtual memory | |
99 | * space that has a special rule for the page-fault handlers (ie a shared | |
100 | * library, the executable area etc). | |
101 | */ | |
102 | struct vm_area_struct { | |
103 | struct mm_struct * vm_mm; /* The address space we belong to. */ | |
104 | unsigned long vm_start; /* Our start address within vm_mm. */ | |
105 | unsigned long vm_end; /* The first byte after our end address | |
106 | within vm_mm. */ | |
107 | ||
108 | /* linked list of VM areas per task, sorted by address */ | |
109 | struct vm_area_struct *vm_next; | |
110 | ||
111 | pgprot_t vm_page_prot; /* Access permissions of this VMA. */ | |
112 | unsigned long vm_flags; /* Flags, listed below. */ | |
113 | ||
114 | struct rb_node vm_rb; | |
115 | ||
116 | /* | |
117 | * For areas with an address space and backing store, | |
118 | * linkage into the address_space->i_mmap prio tree, or | |
119 | * linkage to the list of like vmas hanging off its node, or | |
120 | * linkage of vma in the address_space->i_mmap_nonlinear list. | |
121 | */ | |
122 | union { | |
123 | struct { | |
124 | struct list_head list; | |
125 | void *parent; /* aligns with prio_tree_node parent */ | |
126 | struct vm_area_struct *head; | |
127 | } vm_set; | |
128 | ||
129 | struct raw_prio_tree_node prio_tree_node; | |
130 | } shared; | |
131 | ||
132 | /* | |
133 | * A file's MAP_PRIVATE vma can be in both i_mmap tree and anon_vma | |
134 | * list, after a COW of one of the file pages. A MAP_SHARED vma | |
135 | * can only be in the i_mmap tree. An anonymous MAP_PRIVATE, stack | |
136 | * or brk vma (with NULL file) can only be in an anon_vma list. | |
137 | */ | |
138 | struct list_head anon_vma_node; /* Serialized by anon_vma->lock */ | |
139 | struct anon_vma *anon_vma; /* Serialized by page_table_lock */ | |
140 | ||
141 | /* Function pointers to deal with this struct. */ | |
142 | struct vm_operations_struct * vm_ops; | |
143 | ||
144 | /* Information about our backing store: */ | |
145 | unsigned long vm_pgoff; /* Offset (within vm_file) in PAGE_SIZE | |
146 | units, *not* PAGE_CACHE_SIZE */ | |
147 | struct file * vm_file; /* File we map to (can be NULL). */ | |
148 | void * vm_private_data; /* was vm_pte (shared mem) */ | |
149 | unsigned long vm_truncate_count;/* truncate_count or restart_addr */ | |
150 | ||
151 | #ifndef CONFIG_MMU | |
152 | atomic_t vm_usage; /* refcount (VMAs shared if !MMU) */ | |
153 | #endif | |
154 | #ifdef CONFIG_NUMA | |
155 | struct mempolicy *vm_policy; /* NUMA policy for the VMA */ | |
156 | #endif | |
157 | }; | |
158 | ||
159 | struct mm_struct { | |
160 | struct vm_area_struct * mmap; /* list of VMAs */ | |
161 | struct rb_root mm_rb; | |
162 | struct vm_area_struct * mmap_cache; /* last find_vma result */ | |
163 | unsigned long (*get_unmapped_area) (struct file *filp, | |
164 | unsigned long addr, unsigned long len, | |
165 | unsigned long pgoff, unsigned long flags); | |
166 | void (*unmap_area) (struct mm_struct *mm, unsigned long addr); | |
167 | unsigned long mmap_base; /* base of mmap area */ | |
168 | unsigned long task_size; /* size of task vm space */ | |
169 | unsigned long cached_hole_size; /* if non-zero, the largest hole below free_area_cache */ | |
170 | unsigned long free_area_cache; /* first hole of size cached_hole_size or larger */ | |
171 | pgd_t * pgd; | |
172 | atomic_t mm_users; /* How many users with user space? */ | |
173 | atomic_t mm_count; /* How many references to "struct mm_struct" (users count as 1) */ | |
174 | int map_count; /* number of VMAs */ | |
175 | struct rw_semaphore mmap_sem; | |
176 | spinlock_t page_table_lock; /* Protects page tables and some counters */ | |
177 | ||
178 | struct list_head mmlist; /* List of maybe swapped mm's. These are globally strung | |
179 | * together off init_mm.mmlist, and are protected | |
180 | * by mmlist_lock | |
181 | */ | |
182 | ||
183 | /* Special counters, in some configurations protected by the | |
184 | * page_table_lock, in other configurations by being atomic. | |
185 | */ | |
186 | mm_counter_t _file_rss; | |
187 | mm_counter_t _anon_rss; | |
188 | ||
189 | unsigned long hiwater_rss; /* High-watermark of RSS usage */ | |
190 | unsigned long hiwater_vm; /* High-water virtual memory usage */ | |
191 | ||
192 | unsigned long total_vm, locked_vm, shared_vm, exec_vm; | |
193 | unsigned long stack_vm, reserved_vm, def_flags, nr_ptes; | |
194 | unsigned long start_code, end_code, start_data, end_data; | |
195 | unsigned long start_brk, brk, start_stack; | |
196 | unsigned long arg_start, arg_end, env_start, env_end; | |
197 | ||
198 | unsigned long saved_auxv[AT_VECTOR_SIZE]; /* for /proc/PID/auxv */ | |
199 | ||
200 | cpumask_t cpu_vm_mask; | |
201 | ||
202 | /* Architecture-specific MM context */ | |
203 | mm_context_t context; | |
204 | ||
205 | /* Swap token stuff */ | |
206 | /* | |
207 | * Last value of global fault stamp as seen by this process. | |
208 | * In other words, this value gives an indication of how long | |
209 | * it has been since this task got the token. | |
210 | * Look at mm/thrash.c | |
211 | */ | |
212 | unsigned int faultstamp; | |
213 | unsigned int token_priority; | |
214 | unsigned int last_interval; | |
215 | ||
216 | unsigned long flags; /* Must use atomic bitops to access the bits */ | |
217 | ||
218 | /* coredumping support */ | |
219 | int core_waiters; | |
220 | struct completion *core_startup_done, core_done; | |
221 | ||
222 | /* aio bits */ | |
223 | rwlock_t ioctx_list_lock; | |
224 | struct kioctx *ioctx_list; | |
78fb7466 PE |
225 | #ifdef CONFIG_CGROUP_MEM_CONT |
226 | struct mem_cgroup *mem_cgroup; | |
227 | #endif | |
c92ff1bd MS |
228 | }; |
229 | ||
5b99cd0e | 230 | #endif /* _LINUX_MM_TYPES_H */ |