| buffer.c (3d67f2d7c0fb28b0eb6a6aa100b190526a971ad9) | buffer.c (f98393a64ca1392130724c3acb4e3f325801d2b6) |
|---|---|
| 1/* 2 * linux/fs/buffer.c 3 * 4 * Copyright (C) 1991, 1992, 2002 Linus Torvalds 5 */ 6 7/* 8 * Start bdflush() with kernel_thread not syscall - Paul Gortmaker, 12/95 --- 319 unchanged lines hidden (view full) --- 328 329 For handling cache coherency with the blkdev pagecache the 'update' case 330 is been introduced. It is needed to re-read from disk any pinned 331 buffer. NOTE: re-reading from disk is destructive so we can do it only 332 when we assume nobody is changing the buffercache under our I/O and when 333 we think the disk contains more recent information than the buffercache. 334 The update == 1 pass marks the buffers we need to update, the update == 2 335 pass does the actual I/O. */ | 1/* 2 * linux/fs/buffer.c 3 * 4 * Copyright (C) 1991, 1992, 2002 Linus Torvalds 5 */ 6 7/* 8 * Start bdflush() with kernel_thread not syscall - Paul Gortmaker, 12/95 --- 319 unchanged lines hidden (view full) --- 328 329 For handling cache coherency with the blkdev pagecache the 'update' case 330 is been introduced. It is needed to re-read from disk any pinned 331 buffer. NOTE: re-reading from disk is destructive so we can do it only 332 when we assume nobody is changing the buffercache under our I/O and when 333 we think the disk contains more recent information than the buffercache. 334 The update == 1 pass marks the buffers we need to update, the update == 2 335 pass does the actual I/O. */ |
| 336void invalidate_bdev(struct block_device *bdev, int destroy_dirty_buffers) | 336void invalidate_bdev(struct block_device *bdev) |
| 337{ 338 struct address_space *mapping = bdev->bd_inode->i_mapping; 339 340 if (mapping->nrpages == 0) 341 return; 342 343 invalidate_bh_lrus(); | 337{ 338 struct address_space *mapping = bdev->bd_inode->i_mapping; 339 340 if (mapping->nrpages == 0) 341 return; 342 343 invalidate_bh_lrus(); |
| 344 /* 345 * FIXME: what about destroy_dirty_buffers? 346 * We really want to use invalidate_inode_pages2() for 347 * that, but not until that's cleaned up. 348 */ | |
| 349 invalidate_mapping_pages(mapping, 0, -1); 350} 351 352/* 353 * Kick pdflush then try to free up some ZONE_NORMAL memory. 354 */ 355static void free_more_memory(void) 356{ --- 2680 unchanged lines hidden --- | 344 invalidate_mapping_pages(mapping, 0, -1); 345} 346 347/* 348 * Kick pdflush then try to free up some ZONE_NORMAL memory. 349 */ 350static void free_more_memory(void) 351{ --- 2680 unchanged lines hidden --- |