Heiko Carstens | 5b99cd0 | 2006-09-27 01:50:01 -0700 | [diff] [blame] | 1 | #ifndef _LINUX_MM_TYPES_H |
| 2 | #define _LINUX_MM_TYPES_H |
| 3 | |
Olaf Hering | 4f9a58d | 2007-10-16 23:30:12 -0700 | [diff] [blame] | 4 | #include <linux/auxvec.h> |
Heiko Carstens | 5b99cd0 | 2006-09-27 01:50:01 -0700 | [diff] [blame] | 5 | #include <linux/types.h> |
| 6 | #include <linux/threads.h> |
| 7 | #include <linux/list.h> |
| 8 | #include <linux/spinlock.h> |
Martin Schwidefsky | c92ff1b | 2007-10-16 01:24:43 -0700 | [diff] [blame] | 9 | #include <linux/prio_tree.h> |
| 10 | #include <linux/rbtree.h> |
| 11 | #include <linux/rwsem.h> |
| 12 | #include <linux/completion.h> |
Andrea Arcangeli | cddb8a5 | 2008-07-28 15:46:29 -0700 | [diff] [blame] | 13 | #include <linux/cpumask.h> |
Akinobu Mita | 6a11f75 | 2009-03-31 15:23:17 -0700 | [diff] [blame] | 14 | #include <linux/page-debug-flags.h> |
Martin Schwidefsky | c92ff1b | 2007-10-16 01:24:43 -0700 | [diff] [blame] | 15 | #include <asm/page.h> |
| 16 | #include <asm/mmu.h> |
Heiko Carstens | 5b99cd0 | 2006-09-27 01:50:01 -0700 | [diff] [blame] | 17 | |
Olaf Hering | 4f9a58d | 2007-10-16 23:30:12 -0700 | [diff] [blame] | 18 | #ifndef AT_VECTOR_SIZE_ARCH |
| 19 | #define AT_VECTOR_SIZE_ARCH 0 |
| 20 | #endif |
| 21 | #define AT_VECTOR_SIZE (2*(AT_VECTOR_SIZE_ARCH + AT_VECTOR_SIZE_BASE + 1)) |
| 22 | |
Heiko Carstens | 5b99cd0 | 2006-09-27 01:50:01 -0700 | [diff] [blame] | 23 | struct address_space; |
| 24 | |
Jeremy Fitzhardinge | f7d0b92 | 2008-09-09 15:43:22 -0700 | [diff] [blame] | 25 | #define USE_SPLIT_PTLOCKS (NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS) |
| 26 | |
Heiko Carstens | 5b99cd0 | 2006-09-27 01:50:01 -0700 | [diff] [blame] | 27 | /* |
| 28 | * Each physical page in the system has a struct page associated with |
| 29 | * it to keep track of whatever it is we are using the page for at the |
| 30 | * moment. Note that we have no way to track which tasks are using |
| 31 | * a page, though if it is a pagecache page, rmap structures can tell us |
| 32 | * who is mapping it. |
Christoph Lameter | fc9bb8c | 2011-06-01 12:25:48 -0500 | [diff] [blame] | 33 | * |
| 34 | * The objects in struct page are organized in double word blocks in |
| 35 | * order to allows us to use atomic double word operations on portions |
| 36 | * of struct page. That is currently only used by slub but the arrangement |
| 37 | * allows the use of atomic double word operations on the flags/mapping |
| 38 | * and lru list pointers also. |
Heiko Carstens | 5b99cd0 | 2006-09-27 01:50:01 -0700 | [diff] [blame] | 39 | */ |
| 40 | struct page { |
Christoph Lameter | fc9bb8c | 2011-06-01 12:25:48 -0500 | [diff] [blame] | 41 | /* First double word block */ |
Heiko Carstens | 5b99cd0 | 2006-09-27 01:50:01 -0700 | [diff] [blame] | 42 | unsigned long flags; /* Atomic flags, some possibly |
| 43 | * updated asynchronously */ |
Christoph Lameter | fc9bb8c | 2011-06-01 12:25:48 -0500 | [diff] [blame] | 44 | struct address_space *mapping; /* If low bit clear, points to |
| 45 | * inode address_space, or NULL. |
| 46 | * If page mapped as anonymous |
| 47 | * memory, low bit is set, and |
| 48 | * it points to anon_vma object: |
| 49 | * see PAGE_MAPPING_ANON below. |
Heiko Carstens | 5b99cd0 | 2006-09-27 01:50:01 -0700 | [diff] [blame] | 50 | */ |
Christoph Lameter | fc9bb8c | 2011-06-01 12:25:48 -0500 | [diff] [blame] | 51 | /* Second double word */ |
Christoph Lameter | 013e896 | 2011-07-14 12:48:14 -0500 | [diff] [blame] | 52 | struct { |
| 53 | union { |
Christoph Lameter | fc9bb8c | 2011-06-01 12:25:48 -0500 | [diff] [blame] | 54 | pgoff_t index; /* Our offset within mapping. */ |
Christoph Lameter | 013e896 | 2011-07-14 12:48:14 -0500 | [diff] [blame] | 55 | void *freelist; /* slub first free object */ |
| 56 | }; |
| 57 | |
| 58 | union { |
| 59 | /* Used for cmpxchg_double in slub */ |
| 60 | unsigned long counters; |
| 61 | |
| 62 | struct { |
| 63 | |
| 64 | union { |
| 65 | atomic_t _mapcount; /* Count of ptes mapped in mms, |
Christoph Lameter | fc9bb8c | 2011-06-01 12:25:48 -0500 | [diff] [blame] | 66 | * to show when page is mapped |
| 67 | * & limit reverse map searches. |
| 68 | */ |
Christoph Lameter | fc9bb8c | 2011-06-01 12:25:48 -0500 | [diff] [blame] | 69 | |
Christoph Lameter | 013e896 | 2011-07-14 12:48:14 -0500 | [diff] [blame] | 70 | struct { |
| 71 | unsigned inuse:16; |
| 72 | unsigned objects:15; |
| 73 | unsigned frozen:1; |
| 74 | }; |
Pekka Enberg | 3adf004 | 2011-07-18 15:16:55 +0300 | [diff] [blame] | 75 | }; |
Christoph Lameter | 013e896 | 2011-07-14 12:48:14 -0500 | [diff] [blame] | 76 | atomic_t _count; /* Usage count, see below. */ |
Christoph Lameter | fc9bb8c | 2011-06-01 12:25:48 -0500 | [diff] [blame] | 77 | }; |
Christoph Lameter | 39b2646 | 2008-04-14 19:11:30 +0300 | [diff] [blame] | 78 | }; |
Christoph Lameter | 81819f0 | 2007-05-06 14:49:36 -0700 | [diff] [blame] | 79 | }; |
Christoph Lameter | fc9bb8c | 2011-06-01 12:25:48 -0500 | [diff] [blame] | 80 | |
| 81 | /* Third double word block */ |
| 82 | struct list_head lru; /* Pageout list, eg. active_list |
| 83 | * protected by zone->lru_lock ! |
| 84 | */ |
| 85 | |
| 86 | /* Remainder is not double word aligned */ |
Heiko Carstens | 5b99cd0 | 2006-09-27 01:50:01 -0700 | [diff] [blame] | 87 | union { |
Heiko Carstens | 5b99cd0 | 2006-09-27 01:50:01 -0700 | [diff] [blame] | 88 | unsigned long private; /* Mapping-private opaque data: |
| 89 | * usually used for buffer_heads |
| 90 | * if PagePrivate set; used for |
| 91 | * swp_entry_t if PageSwapCache; |
| 92 | * indicates order in the buddy |
| 93 | * system if PG_buddy is set. |
| 94 | */ |
Jeremy Fitzhardinge | f7d0b92 | 2008-09-09 15:43:22 -0700 | [diff] [blame] | 95 | #if USE_SPLIT_PTLOCKS |
Christoph Lameter | fc9bb8c | 2011-06-01 12:25:48 -0500 | [diff] [blame] | 96 | spinlock_t ptl; |
Heiko Carstens | 5b99cd0 | 2006-09-27 01:50:01 -0700 | [diff] [blame] | 97 | #endif |
Christoph Lameter | fc9bb8c | 2011-06-01 12:25:48 -0500 | [diff] [blame] | 98 | struct kmem_cache *slab; /* SLUB: Pointer to slab */ |
| 99 | struct page *first_page; /* Compound tail pages */ |
Heiko Carstens | 5b99cd0 | 2006-09-27 01:50:01 -0700 | [diff] [blame] | 100 | }; |
Christoph Lameter | fc9bb8c | 2011-06-01 12:25:48 -0500 | [diff] [blame] | 101 | |
Heiko Carstens | 5b99cd0 | 2006-09-27 01:50:01 -0700 | [diff] [blame] | 102 | /* |
| 103 | * On machines where all RAM is mapped into kernel address space, |
| 104 | * we can simply calculate the virtual address. On machines with |
| 105 | * highmem some memory is mapped into kernel virtual memory |
| 106 | * dynamically, so we need a place to store that address. |
| 107 | * Note that this field could be 16 bits on x86 ... ;) |
| 108 | * |
| 109 | * Architectures with slow multiplication can define |
| 110 | * WANT_PAGE_VIRTUAL in asm/page.h |
| 111 | */ |
| 112 | #if defined(WANT_PAGE_VIRTUAL) |
| 113 | void *virtual; /* Kernel virtual address (NULL if |
| 114 | not kmapped, ie. highmem) */ |
| 115 | #endif /* WANT_PAGE_VIRTUAL */ |
Akinobu Mita | ee3b429 | 2009-04-02 16:56:30 -0700 | [diff] [blame] | 116 | #ifdef CONFIG_WANT_PAGE_DEBUG_FLAGS |
| 117 | unsigned long debug_flags; /* Use atomic bitops on this */ |
| 118 | #endif |
Vegard Nossum | dfec072 | 2008-04-04 00:51:41 +0200 | [diff] [blame] | 119 | |
| 120 | #ifdef CONFIG_KMEMCHECK |
| 121 | /* |
| 122 | * kmemcheck wants to track the status of each byte in a page; this |
| 123 | * is a pointer to such a status block. NULL if not tracked. |
| 124 | */ |
| 125 | void *shadow; |
| 126 | #endif |
Christoph Lameter | fc9bb8c | 2011-06-01 12:25:48 -0500 | [diff] [blame] | 127 | } |
| 128 | /* |
| 129 | * If another subsystem starts using the double word pairing for atomic |
| 130 | * operations on struct page then it must change the #if to ensure |
| 131 | * proper alignment of the page struct. |
| 132 | */ |
| 133 | #if defined(CONFIG_SLUB) && defined(CONFIG_CMPXCHG_LOCAL) |
| 134 | __attribute__((__aligned__(2*sizeof(unsigned long)))) |
| 135 | #endif |
| 136 | ; |
Heiko Carstens | 5b99cd0 | 2006-09-27 01:50:01 -0700 | [diff] [blame] | 137 | |
KOSAKI Motohiro | ca16d14 | 2011-05-26 19:16:19 +0900 | [diff] [blame] | 138 | typedef unsigned long __nocast vm_flags_t; |
| 139 | |
Martin Schwidefsky | c92ff1b | 2007-10-16 01:24:43 -0700 | [diff] [blame] | 140 | /* |
David Howells | 8feae13 | 2009-01-08 12:04:47 +0000 | [diff] [blame] | 141 | * A region containing a mapping of a non-memory backed file under NOMMU |
| 142 | * conditions. These are held in a global tree and are pinned by the VMAs that |
| 143 | * map parts of them. |
| 144 | */ |
| 145 | struct vm_region { |
| 146 | struct rb_node vm_rb; /* link in global region tree */ |
KOSAKI Motohiro | ca16d14 | 2011-05-26 19:16:19 +0900 | [diff] [blame] | 147 | vm_flags_t vm_flags; /* VMA vm_flags */ |
David Howells | 8feae13 | 2009-01-08 12:04:47 +0000 | [diff] [blame] | 148 | unsigned long vm_start; /* start address of region */ |
| 149 | unsigned long vm_end; /* region initialised to here */ |
Paul Mundt | dd8632a | 2009-01-08 12:04:47 +0000 | [diff] [blame] | 150 | unsigned long vm_top; /* region allocated to here */ |
David Howells | 8feae13 | 2009-01-08 12:04:47 +0000 | [diff] [blame] | 151 | unsigned long vm_pgoff; /* the offset in vm_file corresponding to vm_start */ |
| 152 | struct file *vm_file; /* the backing file or NULL */ |
| 153 | |
David Howells | 1e2ae59 | 2010-01-15 17:01:33 -0800 | [diff] [blame] | 154 | int vm_usage; /* region usage count (access under nommu_region_sem) */ |
Mike Frysinger | cfe79c0 | 2010-01-06 17:23:23 +0000 | [diff] [blame] | 155 | bool vm_icache_flushed : 1; /* true if the icache has been flushed for |
| 156 | * this region */ |
David Howells | 8feae13 | 2009-01-08 12:04:47 +0000 | [diff] [blame] | 157 | }; |
| 158 | |
| 159 | /* |
Martin Schwidefsky | c92ff1b | 2007-10-16 01:24:43 -0700 | [diff] [blame] | 160 | * This struct defines a memory VMM memory area. There is one of these |
| 161 | * per VM-area/task. A VM area is any part of the process virtual memory |
| 162 | * space that has a special rule for the page-fault handlers (ie a shared |
| 163 | * library, the executable area etc). |
| 164 | */ |
| 165 | struct vm_area_struct { |
| 166 | struct mm_struct * vm_mm; /* The address space we belong to. */ |
| 167 | unsigned long vm_start; /* Our start address within vm_mm. */ |
| 168 | unsigned long vm_end; /* The first byte after our end address |
| 169 | within vm_mm. */ |
| 170 | |
| 171 | /* linked list of VM areas per task, sorted by address */ |
Linus Torvalds | 297c5ee | 2010-08-20 16:24:55 -0700 | [diff] [blame] | 172 | struct vm_area_struct *vm_next, *vm_prev; |
Martin Schwidefsky | c92ff1b | 2007-10-16 01:24:43 -0700 | [diff] [blame] | 173 | |
| 174 | pgprot_t vm_page_prot; /* Access permissions of this VMA. */ |
Hugh Dickins | 605d928 | 2008-08-16 11:07:21 +0100 | [diff] [blame] | 175 | unsigned long vm_flags; /* Flags, see mm.h. */ |
Martin Schwidefsky | c92ff1b | 2007-10-16 01:24:43 -0700 | [diff] [blame] | 176 | |
| 177 | struct rb_node vm_rb; |
| 178 | |
| 179 | /* |
| 180 | * For areas with an address space and backing store, |
| 181 | * linkage into the address_space->i_mmap prio tree, or |
| 182 | * linkage to the list of like vmas hanging off its node, or |
| 183 | * linkage of vma in the address_space->i_mmap_nonlinear list. |
| 184 | */ |
| 185 | union { |
| 186 | struct { |
| 187 | struct list_head list; |
| 188 | void *parent; /* aligns with prio_tree_node parent */ |
| 189 | struct vm_area_struct *head; |
| 190 | } vm_set; |
| 191 | |
| 192 | struct raw_prio_tree_node prio_tree_node; |
| 193 | } shared; |
| 194 | |
| 195 | /* |
| 196 | * A file's MAP_PRIVATE vma can be in both i_mmap tree and anon_vma |
| 197 | * list, after a COW of one of the file pages. A MAP_SHARED vma |
| 198 | * can only be in the i_mmap tree. An anonymous MAP_PRIVATE, stack |
| 199 | * or brk vma (with NULL file) can only be in an anon_vma list. |
| 200 | */ |
Rik van Riel | 5beb493 | 2010-03-05 13:42:07 -0800 | [diff] [blame] | 201 | struct list_head anon_vma_chain; /* Serialized by mmap_sem & |
| 202 | * page_table_lock */ |
Martin Schwidefsky | c92ff1b | 2007-10-16 01:24:43 -0700 | [diff] [blame] | 203 | struct anon_vma *anon_vma; /* Serialized by page_table_lock */ |
| 204 | |
| 205 | /* Function pointers to deal with this struct. */ |
Alexey Dobriyan | f0f37e2 | 2009-09-27 22:29:37 +0400 | [diff] [blame] | 206 | const struct vm_operations_struct *vm_ops; |
Martin Schwidefsky | c92ff1b | 2007-10-16 01:24:43 -0700 | [diff] [blame] | 207 | |
| 208 | /* Information about our backing store: */ |
| 209 | unsigned long vm_pgoff; /* Offset (within vm_file) in PAGE_SIZE |
| 210 | units, *not* PAGE_CACHE_SIZE */ |
| 211 | struct file * vm_file; /* File we map to (can be NULL). */ |
| 212 | void * vm_private_data; /* was vm_pte (shared mem) */ |
Martin Schwidefsky | c92ff1b | 2007-10-16 01:24:43 -0700 | [diff] [blame] | 213 | |
| 214 | #ifndef CONFIG_MMU |
David Howells | 8feae13 | 2009-01-08 12:04:47 +0000 | [diff] [blame] | 215 | struct vm_region *vm_region; /* NOMMU mapping region */ |
Martin Schwidefsky | c92ff1b | 2007-10-16 01:24:43 -0700 | [diff] [blame] | 216 | #endif |
| 217 | #ifdef CONFIG_NUMA |
| 218 | struct mempolicy *vm_policy; /* NUMA policy for the VMA */ |
| 219 | #endif |
| 220 | }; |
| 221 | |
Oleg Nesterov | b564daf | 2008-07-25 01:47:44 -0700 | [diff] [blame] | 222 | struct core_thread { |
| 223 | struct task_struct *task; |
| 224 | struct core_thread *next; |
| 225 | }; |
| 226 | |
Oleg Nesterov | 32ecb1f | 2008-07-25 01:47:41 -0700 | [diff] [blame] | 227 | struct core_state { |
Oleg Nesterov | c5f1cc8 | 2008-07-25 01:47:42 -0700 | [diff] [blame] | 228 | atomic_t nr_threads; |
Oleg Nesterov | b564daf | 2008-07-25 01:47:44 -0700 | [diff] [blame] | 229 | struct core_thread dumper; |
Oleg Nesterov | 32ecb1f | 2008-07-25 01:47:41 -0700 | [diff] [blame] | 230 | struct completion startup; |
| 231 | }; |
| 232 | |
KAMEZAWA Hiroyuki | d559db0 | 2010-03-05 13:41:39 -0800 | [diff] [blame] | 233 | enum { |
| 234 | MM_FILEPAGES, |
| 235 | MM_ANONPAGES, |
KAMEZAWA Hiroyuki | b084d43 | 2010-03-05 13:41:42 -0800 | [diff] [blame] | 236 | MM_SWAPENTS, |
KAMEZAWA Hiroyuki | d559db0 | 2010-03-05 13:41:39 -0800 | [diff] [blame] | 237 | NR_MM_COUNTERS |
| 238 | }; |
| 239 | |
KAMEZAWA Hiroyuki | 53bddb4 | 2010-03-10 15:20:38 -0800 | [diff] [blame] | 240 | #if USE_SPLIT_PTLOCKS && defined(CONFIG_MMU) |
KAMEZAWA Hiroyuki | 34e5523 | 2010-03-05 13:41:40 -0800 | [diff] [blame] | 241 | #define SPLIT_RSS_COUNTING |
KAMEZAWA Hiroyuki | 34e5523 | 2010-03-05 13:41:40 -0800 | [diff] [blame] | 242 | /* per-thread cached information, */ |
| 243 | struct task_rss_stat { |
| 244 | int events; /* for synchronization threshold */ |
| 245 | int count[NR_MM_COUNTERS]; |
| 246 | }; |
Matt Fleming | 172703b | 2011-05-24 17:12:36 -0700 | [diff] [blame] | 247 | #endif /* USE_SPLIT_PTLOCKS */ |
| 248 | |
KAMEZAWA Hiroyuki | d559db0 | 2010-03-05 13:41:39 -0800 | [diff] [blame] | 249 | struct mm_rss_stat { |
Matt Fleming | 172703b | 2011-05-24 17:12:36 -0700 | [diff] [blame] | 250 | atomic_long_t count[NR_MM_COUNTERS]; |
KAMEZAWA Hiroyuki | d559db0 | 2010-03-05 13:41:39 -0800 | [diff] [blame] | 251 | }; |
KAMEZAWA Hiroyuki | d559db0 | 2010-03-05 13:41:39 -0800 | [diff] [blame] | 252 | |
Martin Schwidefsky | c92ff1b | 2007-10-16 01:24:43 -0700 | [diff] [blame] | 253 | struct mm_struct { |
| 254 | struct vm_area_struct * mmap; /* list of VMAs */ |
| 255 | struct rb_root mm_rb; |
| 256 | struct vm_area_struct * mmap_cache; /* last find_vma result */ |
David Howells | efc1a3b | 2010-01-15 17:01:35 -0800 | [diff] [blame] | 257 | #ifdef CONFIG_MMU |
Martin Schwidefsky | c92ff1b | 2007-10-16 01:24:43 -0700 | [diff] [blame] | 258 | unsigned long (*get_unmapped_area) (struct file *filp, |
| 259 | unsigned long addr, unsigned long len, |
| 260 | unsigned long pgoff, unsigned long flags); |
| 261 | void (*unmap_area) (struct mm_struct *mm, unsigned long addr); |
David Howells | efc1a3b | 2010-01-15 17:01:35 -0800 | [diff] [blame] | 262 | #endif |
Martin Schwidefsky | c92ff1b | 2007-10-16 01:24:43 -0700 | [diff] [blame] | 263 | unsigned long mmap_base; /* base of mmap area */ |
| 264 | unsigned long task_size; /* size of task vm space */ |
| 265 | unsigned long cached_hole_size; /* if non-zero, the largest hole below free_area_cache */ |
| 266 | unsigned long free_area_cache; /* first hole of size cached_hole_size or larger */ |
| 267 | pgd_t * pgd; |
| 268 | atomic_t mm_users; /* How many users with user space? */ |
| 269 | atomic_t mm_count; /* How many references to "struct mm_struct" (users count as 1) */ |
| 270 | int map_count; /* number of VMAs */ |
Richard Kennedy | 481b4bb | 2011-03-22 16:32:50 -0700 | [diff] [blame] | 271 | |
Martin Schwidefsky | c92ff1b | 2007-10-16 01:24:43 -0700 | [diff] [blame] | 272 | spinlock_t page_table_lock; /* Protects page tables and some counters */ |
Richard Kennedy | 481b4bb | 2011-03-22 16:32:50 -0700 | [diff] [blame] | 273 | struct rw_semaphore mmap_sem; |
Martin Schwidefsky | c92ff1b | 2007-10-16 01:24:43 -0700 | [diff] [blame] | 274 | |
| 275 | struct list_head mmlist; /* List of maybe swapped mm's. These are globally strung |
| 276 | * together off init_mm.mmlist, and are protected |
| 277 | * by mmlist_lock |
| 278 | */ |
| 279 | |
Martin Schwidefsky | c92ff1b | 2007-10-16 01:24:43 -0700 | [diff] [blame] | 280 | |
| 281 | unsigned long hiwater_rss; /* High-watermark of RSS usage */ |
| 282 | unsigned long hiwater_vm; /* High-water virtual memory usage */ |
| 283 | |
| 284 | unsigned long total_vm, locked_vm, shared_vm, exec_vm; |
| 285 | unsigned long stack_vm, reserved_vm, def_flags, nr_ptes; |
| 286 | unsigned long start_code, end_code, start_data, end_data; |
| 287 | unsigned long start_brk, brk, start_stack; |
| 288 | unsigned long arg_start, arg_end, env_start, env_end; |
| 289 | |
| 290 | unsigned long saved_auxv[AT_VECTOR_SIZE]; /* for /proc/PID/auxv */ |
| 291 | |
KAMEZAWA Hiroyuki | d559db0 | 2010-03-05 13:41:39 -0800 | [diff] [blame] | 292 | /* |
| 293 | * Special counters, in some configurations protected by the |
| 294 | * page_table_lock, in other configurations by being atomic. |
| 295 | */ |
| 296 | struct mm_rss_stat rss_stat; |
| 297 | |
Hiroshi Shimamoto | 801460d | 2009-09-23 15:57:41 -0700 | [diff] [blame] | 298 | struct linux_binfmt *binfmt; |
| 299 | |
Linus Torvalds | 6345d24 | 2011-05-29 11:32:28 -0700 | [diff] [blame] | 300 | cpumask_var_t cpu_vm_mask_var; |
| 301 | |
Martin Schwidefsky | c92ff1b | 2007-10-16 01:24:43 -0700 | [diff] [blame] | 302 | /* Architecture-specific MM context */ |
| 303 | mm_context_t context; |
| 304 | |
| 305 | /* Swap token stuff */ |
| 306 | /* |
| 307 | * Last value of global fault stamp as seen by this process. |
| 308 | * In other words, this value gives an indication of how long |
| 309 | * it has been since this task got the token. |
| 310 | * Look at mm/thrash.c |
| 311 | */ |
| 312 | unsigned int faultstamp; |
| 313 | unsigned int token_priority; |
| 314 | unsigned int last_interval; |
| 315 | |
Richard Kennedy | 481b4bb | 2011-03-22 16:32:50 -0700 | [diff] [blame] | 316 | /* How many tasks sharing this mm are OOM_DISABLE */ |
| 317 | atomic_t oom_disable_count; |
| 318 | |
Martin Schwidefsky | c92ff1b | 2007-10-16 01:24:43 -0700 | [diff] [blame] | 319 | unsigned long flags; /* Must use atomic bitops to access the bits */ |
| 320 | |
Oleg Nesterov | a94e2d4 | 2008-07-25 01:47:46 -0700 | [diff] [blame] | 321 | struct core_state *core_state; /* coredumping support */ |
Alexey Dobriyan | 858f099 | 2009-09-23 15:57:32 -0700 | [diff] [blame] | 322 | #ifdef CONFIG_AIO |
Jens Axboe | abf137d | 2008-12-09 08:11:22 +0100 | [diff] [blame] | 323 | spinlock_t ioctx_lock; |
| 324 | struct hlist_head ioctx_list; |
Alexey Dobriyan | 858f099 | 2009-09-23 15:57:32 -0700 | [diff] [blame] | 325 | #endif |
Balbir Singh | cf475ad | 2008-04-29 01:00:16 -0700 | [diff] [blame] | 326 | #ifdef CONFIG_MM_OWNER |
KOSAKI Motohiro | 4cd1a8f | 2008-05-12 14:02:31 -0700 | [diff] [blame] | 327 | /* |
| 328 | * "owner" points to a task that is regarded as the canonical |
| 329 | * user/owner of this mm. All of the following must be true in |
| 330 | * order for it to be changed: |
| 331 | * |
| 332 | * current == mm->owner |
| 333 | * current->mm != mm |
| 334 | * new_owner->mm == mm |
| 335 | * new_owner->alloc_lock is held |
| 336 | */ |
Arnd Bergmann | 4d2deb4 | 2010-02-24 20:01:56 +0100 | [diff] [blame] | 337 | struct task_struct __rcu *owner; |
Pavel Emelianov | 78fb746 | 2008-02-07 00:13:51 -0800 | [diff] [blame] | 338 | #endif |
Matt Helsley | 925d1c4 | 2008-04-29 01:01:36 -0700 | [diff] [blame] | 339 | |
Matt Helsley | 925d1c4 | 2008-04-29 01:01:36 -0700 | [diff] [blame] | 340 | /* store ref to file /proc/<pid>/exe symlink points to */ |
| 341 | struct file *exe_file; |
| 342 | unsigned long num_exe_file_vmas; |
Andrea Arcangeli | cddb8a5 | 2008-07-28 15:46:29 -0700 | [diff] [blame] | 343 | #ifdef CONFIG_MMU_NOTIFIER |
| 344 | struct mmu_notifier_mm *mmu_notifier_mm; |
| 345 | #endif |
Andrea Arcangeli | e7a00c4 | 2011-01-13 15:46:45 -0800 | [diff] [blame] | 346 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
| 347 | pgtable_t pmd_huge_pte; /* protected by page_table_lock */ |
| 348 | #endif |
Linus Torvalds | 6345d24 | 2011-05-29 11:32:28 -0700 | [diff] [blame] | 349 | #ifdef CONFIG_CPUMASK_OFFSTACK |
| 350 | struct cpumask cpumask_allocation; |
| 351 | #endif |
Martin Schwidefsky | c92ff1b | 2007-10-16 01:24:43 -0700 | [diff] [blame] | 352 | }; |
| 353 | |
Linus Torvalds | 6345d24 | 2011-05-29 11:32:28 -0700 | [diff] [blame] | 354 | static inline void mm_init_cpumask(struct mm_struct *mm) |
| 355 | { |
| 356 | #ifdef CONFIG_CPUMASK_OFFSTACK |
| 357 | mm->cpu_vm_mask_var = &mm->cpumask_allocation; |
| 358 | #endif |
| 359 | } |
| 360 | |
Rusty Russell | 45e575a | 2009-03-12 14:35:44 -0600 | [diff] [blame] | 361 | /* Future-safe accessor for struct mm_struct's cpu_vm_mask. */ |
KOSAKI Motohiro | de03c72 | 2011-05-24 17:12:15 -0700 | [diff] [blame] | 362 | static inline cpumask_t *mm_cpumask(struct mm_struct *mm) |
| 363 | { |
| 364 | return mm->cpu_vm_mask_var; |
| 365 | } |
Rusty Russell | 45e575a | 2009-03-12 14:35:44 -0600 | [diff] [blame] | 366 | |
Heiko Carstens | 5b99cd0 | 2006-09-27 01:50:01 -0700 | [diff] [blame] | 367 | #endif /* _LINUX_MM_TYPES_H */ |