Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * mm/truncate.c - code for taking down pages from address_spaces |
| 3 | * |
| 4 | * Copyright (C) 2002, Linus Torvalds |
| 5 | * |
| 6 | * 10Sep2002 akpm@zip.com.au |
| 7 | * Initial version. |
| 8 | */ |
| 9 | |
| 10 | #include <linux/kernel.h> |
| 11 | #include <linux/mm.h> |
Nick Piggin | 0fd0e6b | 2006-09-27 01:50:02 -0700 | [diff] [blame] | 12 | #include <linux/swap.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/module.h> |
| 14 | #include <linux/pagemap.h> |
| 15 | #include <linux/pagevec.h> |
Andrew Morton | e08748ce | 2006-12-10 02:19:31 -0800 | [diff] [blame] | 16 | #include <linux/task_io_accounting_ops.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/buffer_head.h> /* grr. try_to_release_page, |
Jan Kara | aaa4059 | 2005-10-30 15:00:16 -0800 | [diff] [blame] | 18 | do_invalidatepage */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | |
| 20 | |
David Howells | cf9a2ae | 2006-08-29 19:05:54 +0100 | [diff] [blame] | 21 | /** |
| 22 | * do_invalidatepage - invalidate part of all of a page |
| 23 | * @page: the page which is affected |
| 24 | * @offset: the index of the truncation point |
| 25 | * |
| 26 | * do_invalidatepage() is called when all or part of the page has become |
| 27 | * invalidated by a truncate operation. |
| 28 | * |
| 29 | * do_invalidatepage() does not have to release all buffers, but it must |
| 30 | * ensure that no dirty buffer is left outside @offset and that no I/O |
| 31 | * is underway against any of the blocks which are outside the truncation |
| 32 | * point. Because the caller is about to free (and possibly reuse) those |
| 33 | * blocks on-disk. |
| 34 | */ |
| 35 | void do_invalidatepage(struct page *page, unsigned long offset) |
| 36 | { |
| 37 | void (*invalidatepage)(struct page *, unsigned long); |
| 38 | invalidatepage = page->mapping->a_ops->invalidatepage; |
David Howells | 9361401 | 2006-09-30 20:45:40 +0200 | [diff] [blame] | 39 | #ifdef CONFIG_BLOCK |
David Howells | cf9a2ae | 2006-08-29 19:05:54 +0100 | [diff] [blame] | 40 | if (!invalidatepage) |
| 41 | invalidatepage = block_invalidatepage; |
David Howells | 9361401 | 2006-09-30 20:45:40 +0200 | [diff] [blame] | 42 | #endif |
David Howells | cf9a2ae | 2006-08-29 19:05:54 +0100 | [diff] [blame] | 43 | if (invalidatepage) |
| 44 | (*invalidatepage)(page, offset); |
| 45 | } |
| 46 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | static inline void truncate_partial_page(struct page *page, unsigned partial) |
| 48 | { |
| 49 | memclear_highpage_flush(page, partial, PAGE_CACHE_SIZE-partial); |
| 50 | if (PagePrivate(page)) |
| 51 | do_invalidatepage(page, partial); |
| 52 | } |
| 53 | |
Linus Torvalds | fba2591 | 2006-12-20 13:46:42 -0800 | [diff] [blame] | 54 | void cancel_dirty_page(struct page *page, unsigned int account_size) |
| 55 | { |
| 56 | /* If we're cancelling the page, it had better not be mapped any more */ |
| 57 | if (page_mapped(page)) { |
| 58 | static unsigned int warncount; |
| 59 | |
| 60 | WARN_ON(++warncount < 5); |
| 61 | } |
| 62 | |
Andrew Morton | 5f2a105 | 2006-12-22 01:04:48 -0800 | [diff] [blame] | 63 | if (TestClearPageDirty(page) && account_size && |
| 64 | mapping_cap_account_dirty(page->mapping)) { |
Andrew Morton | 3e67c09 | 2006-12-21 11:00:33 -0800 | [diff] [blame] | 65 | dec_zone_page_state(page, NR_FILE_DIRTY); |
Linus Torvalds | fba2591 | 2006-12-20 13:46:42 -0800 | [diff] [blame] | 66 | task_io_account_cancelled_write(account_size); |
Andrew Morton | 3e67c09 | 2006-12-21 11:00:33 -0800 | [diff] [blame] | 67 | } |
Linus Torvalds | fba2591 | 2006-12-20 13:46:42 -0800 | [diff] [blame] | 68 | } |
| 69 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | /* |
| 71 | * If truncate cannot remove the fs-private metadata from the page, the page |
| 72 | * becomes anonymous. It will be left on the LRU and may even be mapped into |
| 73 | * user pagetables if we're racing with filemap_nopage(). |
| 74 | * |
| 75 | * We need to bale out if page->mapping is no longer equal to the original |
| 76 | * mapping. This happens a) when the VM reclaimed the page while we waited on |
| 77 | * its lock, b) when a concurrent invalidate_inode_pages got there first and |
| 78 | * c) when tmpfs swizzles a page between a tmpfs inode and swapper_space. |
| 79 | */ |
| 80 | static void |
| 81 | truncate_complete_page(struct address_space *mapping, struct page *page) |
| 82 | { |
| 83 | if (page->mapping != mapping) |
| 84 | return; |
| 85 | |
Andrew Morton | 3e67c09 | 2006-12-21 11:00:33 -0800 | [diff] [blame] | 86 | cancel_dirty_page(page, PAGE_CACHE_SIZE); |
| 87 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | if (PagePrivate(page)) |
| 89 | do_invalidatepage(page, 0); |
| 90 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | ClearPageUptodate(page); |
| 92 | ClearPageMappedToDisk(page); |
| 93 | remove_from_page_cache(page); |
| 94 | page_cache_release(page); /* pagecache ref */ |
| 95 | } |
| 96 | |
| 97 | /* |
| 98 | * This is for invalidate_inode_pages(). That function can be called at |
| 99 | * any time, and is not supposed to throw away dirty pages. But pages can |
Nick Piggin | 0fd0e6b | 2006-09-27 01:50:02 -0700 | [diff] [blame] | 100 | * be marked dirty at any time too, so use remove_mapping which safely |
| 101 | * discards clean, unused pages. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | * |
| 103 | * Returns non-zero if the page was successfully invalidated. |
| 104 | */ |
| 105 | static int |
| 106 | invalidate_complete_page(struct address_space *mapping, struct page *page) |
| 107 | { |
Nick Piggin | 0fd0e6b | 2006-09-27 01:50:02 -0700 | [diff] [blame] | 108 | int ret; |
| 109 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | if (page->mapping != mapping) |
| 111 | return 0; |
| 112 | |
| 113 | if (PagePrivate(page) && !try_to_release_page(page, 0)) |
| 114 | return 0; |
| 115 | |
Nick Piggin | 0fd0e6b | 2006-09-27 01:50:02 -0700 | [diff] [blame] | 116 | ret = remove_mapping(mapping, page); |
Nick Piggin | 0fd0e6b | 2006-09-27 01:50:02 -0700 | [diff] [blame] | 117 | |
| 118 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | } |
| 120 | |
| 121 | /** |
Hans Reiser | d733907 | 2006-01-06 00:10:36 -0800 | [diff] [blame] | 122 | * truncate_inode_pages - truncate range of pages specified by start and |
| 123 | * end byte offsets |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | * @mapping: mapping to truncate |
| 125 | * @lstart: offset from which to truncate |
Hans Reiser | d733907 | 2006-01-06 00:10:36 -0800 | [diff] [blame] | 126 | * @lend: offset to which to truncate |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | * |
Hans Reiser | d733907 | 2006-01-06 00:10:36 -0800 | [diff] [blame] | 128 | * Truncate the page cache, removing the pages that are between |
| 129 | * specified offsets (and zeroing out partial page |
| 130 | * (if lstart is not page aligned)). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | * |
| 132 | * Truncate takes two passes - the first pass is nonblocking. It will not |
| 133 | * block on page locks and it will not block on writeback. The second pass |
| 134 | * will wait. This is to prevent as much IO as possible in the affected region. |
| 135 | * The first pass will remove most pages, so the search cost of the second pass |
| 136 | * is low. |
| 137 | * |
| 138 | * When looking at page->index outside the page lock we need to be careful to |
| 139 | * copy it into a local to avoid races (it could change at any time). |
| 140 | * |
| 141 | * We pass down the cache-hot hint to the page freeing code. Even if the |
| 142 | * mapping is large, it is probably the case that the final pages are the most |
| 143 | * recently touched, and freeing happens in ascending file offset order. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | */ |
Hans Reiser | d733907 | 2006-01-06 00:10:36 -0800 | [diff] [blame] | 145 | void truncate_inode_pages_range(struct address_space *mapping, |
| 146 | loff_t lstart, loff_t lend) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | { |
| 148 | const pgoff_t start = (lstart + PAGE_CACHE_SIZE-1) >> PAGE_CACHE_SHIFT; |
Hans Reiser | d733907 | 2006-01-06 00:10:36 -0800 | [diff] [blame] | 149 | pgoff_t end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | const unsigned partial = lstart & (PAGE_CACHE_SIZE - 1); |
| 151 | struct pagevec pvec; |
| 152 | pgoff_t next; |
| 153 | int i; |
| 154 | |
| 155 | if (mapping->nrpages == 0) |
| 156 | return; |
| 157 | |
Hans Reiser | d733907 | 2006-01-06 00:10:36 -0800 | [diff] [blame] | 158 | BUG_ON((lend & (PAGE_CACHE_SIZE - 1)) != (PAGE_CACHE_SIZE - 1)); |
| 159 | end = (lend >> PAGE_CACHE_SHIFT); |
| 160 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | pagevec_init(&pvec, 0); |
| 162 | next = start; |
Hans Reiser | d733907 | 2006-01-06 00:10:36 -0800 | [diff] [blame] | 163 | while (next <= end && |
| 164 | pagevec_lookup(&pvec, mapping, next, PAGEVEC_SIZE)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | for (i = 0; i < pagevec_count(&pvec); i++) { |
| 166 | struct page *page = pvec.pages[i]; |
| 167 | pgoff_t page_index = page->index; |
| 168 | |
Hans Reiser | d733907 | 2006-01-06 00:10:36 -0800 | [diff] [blame] | 169 | if (page_index > end) { |
| 170 | next = page_index; |
| 171 | break; |
| 172 | } |
| 173 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | if (page_index > next) |
| 175 | next = page_index; |
| 176 | next++; |
| 177 | if (TestSetPageLocked(page)) |
| 178 | continue; |
| 179 | if (PageWriteback(page)) { |
| 180 | unlock_page(page); |
| 181 | continue; |
| 182 | } |
| 183 | truncate_complete_page(mapping, page); |
| 184 | unlock_page(page); |
| 185 | } |
| 186 | pagevec_release(&pvec); |
| 187 | cond_resched(); |
| 188 | } |
| 189 | |
| 190 | if (partial) { |
| 191 | struct page *page = find_lock_page(mapping, start - 1); |
| 192 | if (page) { |
| 193 | wait_on_page_writeback(page); |
| 194 | truncate_partial_page(page, partial); |
| 195 | unlock_page(page); |
| 196 | page_cache_release(page); |
| 197 | } |
| 198 | } |
| 199 | |
| 200 | next = start; |
| 201 | for ( ; ; ) { |
| 202 | cond_resched(); |
| 203 | if (!pagevec_lookup(&pvec, mapping, next, PAGEVEC_SIZE)) { |
| 204 | if (next == start) |
| 205 | break; |
| 206 | next = start; |
| 207 | continue; |
| 208 | } |
Hans Reiser | d733907 | 2006-01-06 00:10:36 -0800 | [diff] [blame] | 209 | if (pvec.pages[0]->index > end) { |
| 210 | pagevec_release(&pvec); |
| 211 | break; |
| 212 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | for (i = 0; i < pagevec_count(&pvec); i++) { |
| 214 | struct page *page = pvec.pages[i]; |
| 215 | |
Hans Reiser | d733907 | 2006-01-06 00:10:36 -0800 | [diff] [blame] | 216 | if (page->index > end) |
| 217 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | lock_page(page); |
| 219 | wait_on_page_writeback(page); |
| 220 | if (page->index > next) |
| 221 | next = page->index; |
| 222 | next++; |
| 223 | truncate_complete_page(mapping, page); |
| 224 | unlock_page(page); |
| 225 | } |
| 226 | pagevec_release(&pvec); |
| 227 | } |
| 228 | } |
Hans Reiser | d733907 | 2006-01-06 00:10:36 -0800 | [diff] [blame] | 229 | EXPORT_SYMBOL(truncate_inode_pages_range); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | |
Hans Reiser | d733907 | 2006-01-06 00:10:36 -0800 | [diff] [blame] | 231 | /** |
| 232 | * truncate_inode_pages - truncate *all* the pages from an offset |
| 233 | * @mapping: mapping to truncate |
| 234 | * @lstart: offset from which to truncate |
| 235 | * |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 236 | * Called under (and serialised by) inode->i_mutex. |
Hans Reiser | d733907 | 2006-01-06 00:10:36 -0800 | [diff] [blame] | 237 | */ |
| 238 | void truncate_inode_pages(struct address_space *mapping, loff_t lstart) |
| 239 | { |
| 240 | truncate_inode_pages_range(mapping, lstart, (loff_t)-1); |
| 241 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | EXPORT_SYMBOL(truncate_inode_pages); |
| 243 | |
| 244 | /** |
| 245 | * invalidate_mapping_pages - Invalidate all the unlocked pages of one inode |
| 246 | * @mapping: the address_space which holds the pages to invalidate |
| 247 | * @start: the offset 'from' which to invalidate |
| 248 | * @end: the offset 'to' which to invalidate (inclusive) |
| 249 | * |
| 250 | * This function only removes the unlocked pages, if you want to |
| 251 | * remove all the pages of one inode, you must call truncate_inode_pages. |
| 252 | * |
| 253 | * invalidate_mapping_pages() will not block on IO activity. It will not |
| 254 | * invalidate pages which are dirty, locked, under writeback or mapped into |
| 255 | * pagetables. |
| 256 | */ |
| 257 | unsigned long invalidate_mapping_pages(struct address_space *mapping, |
| 258 | pgoff_t start, pgoff_t end) |
| 259 | { |
| 260 | struct pagevec pvec; |
| 261 | pgoff_t next = start; |
| 262 | unsigned long ret = 0; |
| 263 | int i; |
| 264 | |
| 265 | pagevec_init(&pvec, 0); |
| 266 | while (next <= end && |
| 267 | pagevec_lookup(&pvec, mapping, next, PAGEVEC_SIZE)) { |
| 268 | for (i = 0; i < pagevec_count(&pvec); i++) { |
| 269 | struct page *page = pvec.pages[i]; |
NeilBrown | e0f2360 | 2006-06-23 02:05:48 -0700 | [diff] [blame] | 270 | pgoff_t index; |
| 271 | int lock_failed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | |
NeilBrown | e0f2360 | 2006-06-23 02:05:48 -0700 | [diff] [blame] | 273 | lock_failed = TestSetPageLocked(page); |
| 274 | |
| 275 | /* |
| 276 | * We really shouldn't be looking at the ->index of an |
| 277 | * unlocked page. But we're not allowed to lock these |
| 278 | * pages. So we rely upon nobody altering the ->index |
| 279 | * of this (pinned-by-us) page. |
| 280 | */ |
| 281 | index = page->index; |
| 282 | if (index > next) |
| 283 | next = index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | next++; |
NeilBrown | e0f2360 | 2006-06-23 02:05:48 -0700 | [diff] [blame] | 285 | if (lock_failed) |
| 286 | continue; |
| 287 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | if (PageDirty(page) || PageWriteback(page)) |
| 289 | goto unlock; |
| 290 | if (page_mapped(page)) |
| 291 | goto unlock; |
| 292 | ret += invalidate_complete_page(mapping, page); |
| 293 | unlock: |
| 294 | unlock_page(page); |
| 295 | if (next > end) |
| 296 | break; |
| 297 | } |
| 298 | pagevec_release(&pvec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | } |
| 300 | return ret; |
| 301 | } |
| 302 | |
| 303 | unsigned long invalidate_inode_pages(struct address_space *mapping) |
| 304 | { |
| 305 | return invalidate_mapping_pages(mapping, 0, ~0UL); |
| 306 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | EXPORT_SYMBOL(invalidate_inode_pages); |
| 308 | |
Andrew Morton | bd4c8ce | 2006-09-30 23:29:29 -0700 | [diff] [blame] | 309 | /* |
| 310 | * This is like invalidate_complete_page(), except it ignores the page's |
| 311 | * refcount. We do this because invalidate_inode_pages2() needs stronger |
| 312 | * invalidation guarantees, and cannot afford to leave pages behind because |
| 313 | * shrink_list() has a temp ref on them, or because they're transiently sitting |
| 314 | * in the lru_cache_add() pagevecs. |
| 315 | */ |
| 316 | static int |
| 317 | invalidate_complete_page2(struct address_space *mapping, struct page *page) |
| 318 | { |
| 319 | if (page->mapping != mapping) |
| 320 | return 0; |
| 321 | |
Trond Myklebust | 887ed2f | 2006-10-11 01:21:58 -0700 | [diff] [blame] | 322 | if (PagePrivate(page) && !try_to_release_page(page, GFP_KERNEL)) |
Andrew Morton | bd4c8ce | 2006-09-30 23:29:29 -0700 | [diff] [blame] | 323 | return 0; |
| 324 | |
| 325 | write_lock_irq(&mapping->tree_lock); |
| 326 | if (PageDirty(page)) |
| 327 | goto failed; |
| 328 | |
| 329 | BUG_ON(PagePrivate(page)); |
| 330 | __remove_from_page_cache(page); |
| 331 | write_unlock_irq(&mapping->tree_lock); |
| 332 | ClearPageUptodate(page); |
| 333 | page_cache_release(page); /* pagecache ref */ |
| 334 | return 1; |
| 335 | failed: |
| 336 | write_unlock_irq(&mapping->tree_lock); |
| 337 | return 0; |
| 338 | } |
| 339 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | /** |
| 341 | * invalidate_inode_pages2_range - remove range of pages from an address_space |
Martin Waitz | 67be2dd | 2005-05-01 08:59:26 -0700 | [diff] [blame] | 342 | * @mapping: the address_space |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | * @start: the page offset 'from' which to invalidate |
| 344 | * @end: the page offset 'to' which to invalidate (inclusive) |
| 345 | * |
| 346 | * Any pages which are found to be mapped into pagetables are unmapped prior to |
| 347 | * invalidation. |
| 348 | * |
| 349 | * Returns -EIO if any pages could not be invalidated. |
| 350 | */ |
| 351 | int invalidate_inode_pages2_range(struct address_space *mapping, |
| 352 | pgoff_t start, pgoff_t end) |
| 353 | { |
| 354 | struct pagevec pvec; |
| 355 | pgoff_t next; |
| 356 | int i; |
| 357 | int ret = 0; |
| 358 | int did_range_unmap = 0; |
| 359 | int wrapped = 0; |
| 360 | |
| 361 | pagevec_init(&pvec, 0); |
| 362 | next = start; |
| 363 | while (next <= end && !ret && !wrapped && |
| 364 | pagevec_lookup(&pvec, mapping, next, |
| 365 | min(end - next, (pgoff_t)PAGEVEC_SIZE - 1) + 1)) { |
| 366 | for (i = 0; !ret && i < pagevec_count(&pvec); i++) { |
| 367 | struct page *page = pvec.pages[i]; |
| 368 | pgoff_t page_index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | |
| 370 | lock_page(page); |
| 371 | if (page->mapping != mapping) { |
| 372 | unlock_page(page); |
| 373 | continue; |
| 374 | } |
| 375 | page_index = page->index; |
| 376 | next = page_index + 1; |
| 377 | if (next == 0) |
| 378 | wrapped = 1; |
| 379 | if (page_index > end) { |
| 380 | unlock_page(page); |
| 381 | break; |
| 382 | } |
| 383 | wait_on_page_writeback(page); |
| 384 | while (page_mapped(page)) { |
| 385 | if (!did_range_unmap) { |
| 386 | /* |
| 387 | * Zap the rest of the file in one hit. |
| 388 | */ |
| 389 | unmap_mapping_range(mapping, |
Oleg Drokin | 479ef59 | 2005-11-23 13:37:47 -0800 | [diff] [blame] | 390 | (loff_t)page_index<<PAGE_CACHE_SHIFT, |
| 391 | (loff_t)(end - page_index + 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | << PAGE_CACHE_SHIFT, |
| 393 | 0); |
| 394 | did_range_unmap = 1; |
| 395 | } else { |
| 396 | /* |
| 397 | * Just zap this page |
| 398 | */ |
| 399 | unmap_mapping_range(mapping, |
Oleg Drokin | 479ef59 | 2005-11-23 13:37:47 -0800 | [diff] [blame] | 400 | (loff_t)page_index<<PAGE_CACHE_SHIFT, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | PAGE_CACHE_SIZE, 0); |
| 402 | } |
| 403 | } |
Linus Torvalds | fba2591 | 2006-12-20 13:46:42 -0800 | [diff] [blame] | 404 | if (!invalidate_complete_page2(mapping, page)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | ret = -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | unlock_page(page); |
| 407 | } |
| 408 | pagevec_release(&pvec); |
| 409 | cond_resched(); |
| 410 | } |
Andrew Morton | 8258d4a | 2006-10-11 01:21:53 -0700 | [diff] [blame] | 411 | WARN_ON_ONCE(ret); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | return ret; |
| 413 | } |
| 414 | EXPORT_SYMBOL_GPL(invalidate_inode_pages2_range); |
| 415 | |
| 416 | /** |
| 417 | * invalidate_inode_pages2 - remove all pages from an address_space |
Martin Waitz | 67be2dd | 2005-05-01 08:59:26 -0700 | [diff] [blame] | 418 | * @mapping: the address_space |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | * |
| 420 | * Any pages which are found to be mapped into pagetables are unmapped prior to |
| 421 | * invalidation. |
| 422 | * |
| 423 | * Returns -EIO if any pages could not be invalidated. |
| 424 | */ |
| 425 | int invalidate_inode_pages2(struct address_space *mapping) |
| 426 | { |
| 427 | return invalidate_inode_pages2_range(mapping, 0, -1); |
| 428 | } |
| 429 | EXPORT_SYMBOL_GPL(invalidate_inode_pages2); |