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-rw-r--r--fs/btrfs/disk-io.c81
1 files changed, 57 insertions, 24 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 6ec80c0..92d7392 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -668,14 +668,31 @@ static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio,
static int btree_writepage(struct page *page, struct writeback_control *wbc)
{
struct extent_io_tree *tree;
+ struct btrfs_root *root = BTRFS_I(page->mapping->host)->root;
+ struct extent_buffer *eb;
+ int was_dirty;
+
tree = &BTRFS_I(page->mapping->host)->io_tree;
+ if (!(current->flags & PF_MEMALLOC)) {
+ return extent_write_full_page(tree, page,
+ btree_get_extent, wbc);
+ }
- if (current->flags & PF_MEMALLOC) {
- redirty_page_for_writepage(wbc, page);
- unlock_page(page);
- return 0;
+ redirty_page_for_writepage(wbc, page);
+ eb = btrfs_find_tree_block(root, page_offset(page),
+ PAGE_CACHE_SIZE);
+ WARN_ON(!eb);
+
+ was_dirty = test_and_set_bit(EXTENT_BUFFER_DIRTY, &eb->bflags);
+ if (!was_dirty) {
+ spin_lock(&root->fs_info->delalloc_lock);
+ root->fs_info->dirty_metadata_bytes += PAGE_CACHE_SIZE;
+ spin_unlock(&root->fs_info->delalloc_lock);
}
- return extent_write_full_page(tree, page, btree_get_extent, wbc);
+ free_extent_buffer(eb);
+
+ unlock_page(page);
+ return 0;
}
static int btree_writepages(struct address_space *mapping,
@@ -684,15 +701,15 @@ static int btree_writepages(struct address_space *mapping,
struct extent_io_tree *tree;
tree = &BTRFS_I(mapping->host)->io_tree;
if (wbc->sync_mode == WB_SYNC_NONE) {
+ struct btrfs_root *root = BTRFS_I(mapping->host)->root;
u64 num_dirty;
- u64 start = 0;
unsigned long thresh = 32 * 1024 * 1024;
if (wbc->for_kupdate)
return 0;
- num_dirty = count_range_bits(tree, &start, (u64)-1,
- thresh, EXTENT_DIRTY);
+ /* this is a bit racy, but that's ok */
+ num_dirty = root->fs_info->dirty_metadata_bytes;
if (num_dirty < thresh)
return 0;
}
@@ -859,9 +876,17 @@ int clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
root->fs_info->running_transaction->transid) {
btrfs_assert_tree_locked(buf);
- /* ugh, clear_extent_buffer_dirty can be expensive */
- btrfs_set_lock_blocking(buf);
+ if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &buf->bflags)) {
+ spin_lock(&root->fs_info->delalloc_lock);
+ if (root->fs_info->dirty_metadata_bytes >= buf->len)
+ root->fs_info->dirty_metadata_bytes -= buf->len;
+ else
+ WARN_ON(1);
+ spin_unlock(&root->fs_info->delalloc_lock);
+ }
+ /* ugh, clear_extent_buffer_dirty needs to lock the page */
+ btrfs_set_lock_blocking(buf);
clear_extent_buffer_dirty(&BTRFS_I(btree_inode)->io_tree,
buf);
}
@@ -1471,12 +1496,6 @@ static int transaction_kthread(void *arg)
vfs_check_frozen(root->fs_info->sb, SB_FREEZE_WRITE);
mutex_lock(&root->fs_info->transaction_kthread_mutex);
- if (root->fs_info->total_ref_cache_size > 20 * 1024 * 1024) {
- printk(KERN_INFO "btrfs: total reference cache "
- "size %llu\n",
- root->fs_info->total_ref_cache_size);
- }
-
mutex_lock(&root->fs_info->trans_mutex);
cur = root->fs_info->running_transaction;
if (!cur) {
@@ -1493,6 +1512,7 @@ static int transaction_kthread(void *arg)
mutex_unlock(&root->fs_info->trans_mutex);
trans = btrfs_start_transaction(root, 1);
ret = btrfs_commit_transaction(trans, root);
+
sleep:
wake_up_process(root->fs_info->cleaner_kthread);
mutex_unlock(&root->fs_info->transaction_kthread_mutex);
@@ -1552,6 +1572,7 @@ struct btrfs_root *open_ctree(struct super_block *sb,
INIT_LIST_HEAD(&fs_info->dead_roots);
INIT_LIST_HEAD(&fs_info->hashers);
INIT_LIST_HEAD(&fs_info->delalloc_inodes);
+ INIT_LIST_HEAD(&fs_info->ordered_operations);
spin_lock_init(&fs_info->delalloc_lock);
spin_lock_init(&fs_info->new_trans_lock);
spin_lock_init(&fs_info->ref_cache_lock);
@@ -1611,10 +1632,6 @@ struct btrfs_root *open_ctree(struct super_block *sb,
extent_io_tree_init(&fs_info->pinned_extents,
fs_info->btree_inode->i_mapping, GFP_NOFS);
- extent_io_tree_init(&fs_info->pending_del,
- fs_info->btree_inode->i_mapping, GFP_NOFS);
- extent_io_tree_init(&fs_info->extent_ins,
- fs_info->btree_inode->i_mapping, GFP_NOFS);
fs_info->do_barriers = 1;
INIT_LIST_HEAD(&fs_info->dead_reloc_roots);
@@ -1627,9 +1644,9 @@ struct btrfs_root *open_ctree(struct super_block *sb,
insert_inode_hash(fs_info->btree_inode);
mutex_init(&fs_info->trans_mutex);
+ mutex_init(&fs_info->ordered_operations_mutex);
mutex_init(&fs_info->tree_log_mutex);
mutex_init(&fs_info->drop_mutex);
- mutex_init(&fs_info->extent_ins_mutex);
mutex_init(&fs_info->pinned_mutex);
mutex_init(&fs_info->chunk_mutex);
mutex_init(&fs_info->transaction_kthread_mutex);
@@ -2358,8 +2375,7 @@ void btrfs_mark_buffer_dirty(struct extent_buffer *buf)
struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root;
u64 transid = btrfs_header_generation(buf);
struct inode *btree_inode = root->fs_info->btree_inode;
-
- btrfs_set_lock_blocking(buf);
+ int was_dirty;
btrfs_assert_tree_locked(buf);
if (transid != root->fs_info->generation) {
@@ -2370,7 +2386,13 @@ void btrfs_mark_buffer_dirty(struct extent_buffer *buf)
(unsigned long long)root->fs_info->generation);
WARN_ON(1);
}
- set_extent_buffer_dirty(&BTRFS_I(btree_inode)->io_tree, buf);
+ was_dirty = set_extent_buffer_dirty(&BTRFS_I(btree_inode)->io_tree,
+ buf);
+ if (!was_dirty) {
+ spin_lock(&root->fs_info->delalloc_lock);
+ root->fs_info->dirty_metadata_bytes += buf->len;
+ spin_unlock(&root->fs_info->delalloc_lock);
+ }
}
void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr)
@@ -2410,6 +2432,7 @@ int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid)
int btree_lock_page_hook(struct page *page)
{
struct inode *inode = page->mapping->host;
+ struct btrfs_root *root = BTRFS_I(inode)->root;
struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;
struct extent_buffer *eb;
unsigned long len;
@@ -2425,6 +2448,16 @@ int btree_lock_page_hook(struct page *page)
btrfs_tree_lock(eb);
btrfs_set_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN);
+
+ if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)) {
+ spin_lock(&root->fs_info->delalloc_lock);
+ if (root->fs_info->dirty_metadata_bytes >= eb->len)
+ root->fs_info->dirty_metadata_bytes -= eb->len;
+ else
+ WARN_ON(1);
+ spin_unlock(&root->fs_info->delalloc_lock);
+ }
+
btrfs_tree_unlock(eb);
free_extent_buffer(eb);
out:
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