page-writeback.c (ff877ea80efa2015b6263766f78ee42c2a1b32f9) page-writeback.c (19fd6231279be3c3bdd02ed99f9b0eb195978064)
1/*
2 * mm/page-writeback.c
3 *
4 * Copyright (C) 2002, Linus Torvalds.
5 * Copyright (C) 2007 Red Hat, Inc., Peter Zijlstra <pzijlstr@redhat.com>
6 *
7 * Contains functions related to writing back dirty pages at the
8 * address_space level.

--- 1074 unchanged lines hidden (view full) ---

1083{
1084 if (!TestSetPageDirty(page)) {
1085 struct address_space *mapping = page_mapping(page);
1086 struct address_space *mapping2;
1087
1088 if (!mapping)
1089 return 1;
1090
1/*
2 * mm/page-writeback.c
3 *
4 * Copyright (C) 2002, Linus Torvalds.
5 * Copyright (C) 2007 Red Hat, Inc., Peter Zijlstra <pzijlstr@redhat.com>
6 *
7 * Contains functions related to writing back dirty pages at the
8 * address_space level.

--- 1074 unchanged lines hidden (view full) ---

1083{
1084 if (!TestSetPageDirty(page)) {
1085 struct address_space *mapping = page_mapping(page);
1086 struct address_space *mapping2;
1087
1088 if (!mapping)
1089 return 1;
1090
1091 write_lock_irq(&mapping->tree_lock);
1091 spin_lock_irq(&mapping->tree_lock);
1092 mapping2 = page_mapping(page);
1093 if (mapping2) { /* Race with truncate? */
1094 BUG_ON(mapping2 != mapping);
1095 WARN_ON_ONCE(!PagePrivate(page) && !PageUptodate(page));
1096 if (mapping_cap_account_dirty(mapping)) {
1097 __inc_zone_page_state(page, NR_FILE_DIRTY);
1098 __inc_bdi_stat(mapping->backing_dev_info,
1099 BDI_RECLAIMABLE);
1100 task_io_account_write(PAGE_CACHE_SIZE);
1101 }
1102 radix_tree_tag_set(&mapping->page_tree,
1103 page_index(page), PAGECACHE_TAG_DIRTY);
1104 }
1092 mapping2 = page_mapping(page);
1093 if (mapping2) { /* Race with truncate? */
1094 BUG_ON(mapping2 != mapping);
1095 WARN_ON_ONCE(!PagePrivate(page) && !PageUptodate(page));
1096 if (mapping_cap_account_dirty(mapping)) {
1097 __inc_zone_page_state(page, NR_FILE_DIRTY);
1098 __inc_bdi_stat(mapping->backing_dev_info,
1099 BDI_RECLAIMABLE);
1100 task_io_account_write(PAGE_CACHE_SIZE);
1101 }
1102 radix_tree_tag_set(&mapping->page_tree,
1103 page_index(page), PAGECACHE_TAG_DIRTY);
1104 }
1105 write_unlock_irq(&mapping->tree_lock);
1105 spin_unlock_irq(&mapping->tree_lock);
1106 if (mapping->host) {
1107 /* !PageAnon && !swapper_space */
1108 __mark_inode_dirty(mapping->host, I_DIRTY_PAGES);
1109 }
1110 return 1;
1111 }
1112 return 0;
1113}

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1253{
1254 struct address_space *mapping = page_mapping(page);
1255 int ret;
1256
1257 if (mapping) {
1258 struct backing_dev_info *bdi = mapping->backing_dev_info;
1259 unsigned long flags;
1260
1106 if (mapping->host) {
1107 /* !PageAnon && !swapper_space */
1108 __mark_inode_dirty(mapping->host, I_DIRTY_PAGES);
1109 }
1110 return 1;
1111 }
1112 return 0;
1113}

--- 139 unchanged lines hidden (view full) ---

1253{
1254 struct address_space *mapping = page_mapping(page);
1255 int ret;
1256
1257 if (mapping) {
1258 struct backing_dev_info *bdi = mapping->backing_dev_info;
1259 unsigned long flags;
1260
1261 write_lock_irqsave(&mapping->tree_lock, flags);
1261 spin_lock_irqsave(&mapping->tree_lock, flags);
1262 ret = TestClearPageWriteback(page);
1263 if (ret) {
1264 radix_tree_tag_clear(&mapping->page_tree,
1265 page_index(page),
1266 PAGECACHE_TAG_WRITEBACK);
1267 if (bdi_cap_account_writeback(bdi)) {
1268 __dec_bdi_stat(bdi, BDI_WRITEBACK);
1269 __bdi_writeout_inc(bdi);
1270 }
1271 }
1262 ret = TestClearPageWriteback(page);
1263 if (ret) {
1264 radix_tree_tag_clear(&mapping->page_tree,
1265 page_index(page),
1266 PAGECACHE_TAG_WRITEBACK);
1267 if (bdi_cap_account_writeback(bdi)) {
1268 __dec_bdi_stat(bdi, BDI_WRITEBACK);
1269 __bdi_writeout_inc(bdi);
1270 }
1271 }
1272 write_unlock_irqrestore(&mapping->tree_lock, flags);
1272 spin_unlock_irqrestore(&mapping->tree_lock, flags);
1273 } else {
1274 ret = TestClearPageWriteback(page);
1275 }
1276 if (ret)
1277 dec_zone_page_state(page, NR_WRITEBACK);
1278 return ret;
1279}
1280
1281int test_set_page_writeback(struct page *page)
1282{
1283 struct address_space *mapping = page_mapping(page);
1284 int ret;
1285
1286 if (mapping) {
1287 struct backing_dev_info *bdi = mapping->backing_dev_info;
1288 unsigned long flags;
1289
1273 } else {
1274 ret = TestClearPageWriteback(page);
1275 }
1276 if (ret)
1277 dec_zone_page_state(page, NR_WRITEBACK);
1278 return ret;
1279}
1280
1281int test_set_page_writeback(struct page *page)
1282{
1283 struct address_space *mapping = page_mapping(page);
1284 int ret;
1285
1286 if (mapping) {
1287 struct backing_dev_info *bdi = mapping->backing_dev_info;
1288 unsigned long flags;
1289
1290 write_lock_irqsave(&mapping->tree_lock, flags);
1290 spin_lock_irqsave(&mapping->tree_lock, flags);
1291 ret = TestSetPageWriteback(page);
1292 if (!ret) {
1293 radix_tree_tag_set(&mapping->page_tree,
1294 page_index(page),
1295 PAGECACHE_TAG_WRITEBACK);
1296 if (bdi_cap_account_writeback(bdi))
1297 __inc_bdi_stat(bdi, BDI_WRITEBACK);
1298 }
1299 if (!PageDirty(page))
1300 radix_tree_tag_clear(&mapping->page_tree,
1301 page_index(page),
1302 PAGECACHE_TAG_DIRTY);
1291 ret = TestSetPageWriteback(page);
1292 if (!ret) {
1293 radix_tree_tag_set(&mapping->page_tree,
1294 page_index(page),
1295 PAGECACHE_TAG_WRITEBACK);
1296 if (bdi_cap_account_writeback(bdi))
1297 __inc_bdi_stat(bdi, BDI_WRITEBACK);
1298 }
1299 if (!PageDirty(page))
1300 radix_tree_tag_clear(&mapping->page_tree,
1301 page_index(page),
1302 PAGECACHE_TAG_DIRTY);
1303 write_unlock_irqrestore(&mapping->tree_lock, flags);
1303 spin_unlock_irqrestore(&mapping->tree_lock, flags);
1304 } else {
1305 ret = TestSetPageWriteback(page);
1306 }
1307 if (!ret)
1308 inc_zone_page_state(page, NR_WRITEBACK);
1309 return ret;
1310
1311}

--- 15 unchanged lines hidden --- 		1304 } else {
1305 ret = TestSetPageWriteback(page);
1306 }
1307 if (!ret)
1308 inc_zone_page_state(page, NR_WRITEBACK);
1309 return ret;
1310
1311}

--- 15 unchanged lines hidden ---