Btrfs: Add some simple throttling to wait for data=ordered and snapshot deletion
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
parent
3063d29f2a
commit
e2008b6140
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@ -345,6 +345,7 @@ struct btrfs_fs_info {
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struct completion kobj_unregister;
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int do_barriers;
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int closing;
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unsigned long throttles;
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u64 total_pinned;
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spinlock_t delalloc_lock;
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@ -631,6 +631,7 @@ struct btrfs_root *open_ctree(struct super_block *sb)
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fs_info->tree_root = tree_root;
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fs_info->extent_root = extent_root;
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fs_info->sb = sb;
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fs_info->throttles = 0;
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fs_info->mount_opt = 0;
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fs_info->max_extent = (u64)-1;
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fs_info->delalloc_bytes = 0;
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@ -889,6 +890,12 @@ void btrfs_mark_buffer_dirty(struct extent_buffer *buf)
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set_extent_buffer_dirty(&BTRFS_I(btree_inode)->extent_tree, buf);
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}
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void btrfs_throttle(struct btrfs_root *root)
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{
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if (root->fs_info->throttles)
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congestion_wait(WRITE, HZ/10);
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}
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void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr)
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{
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balance_dirty_pages_ratelimited_nr(
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@ -64,4 +64,5 @@ int btrfs_clear_buffer_defrag_done(struct extent_buffer *buf);
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int btrfs_read_buffer(struct extent_buffer *buf);
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u32 btrfs_csum_data(struct btrfs_root *root, char *data, u32 seed, size_t len);
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void btrfs_csum_final(u32 crc, char *result);
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void btrfs_throttle(struct btrfs_root *root);
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#endif
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@ -800,6 +800,7 @@ static ssize_t btrfs_file_write(struct file *file, const char __user *buf,
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balance_dirty_pages_ratelimited_nr(inode->i_mapping, num_pages);
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if (num_pages < (root->leafsize >> PAGE_CACHE_SHIFT) + 1)
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btrfs_btree_balance_dirty(root, 1);
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btrfs_throttle(root);
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cond_resched();
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}
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out:
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@ -610,6 +610,7 @@ static int btrfs_unlink(struct inode *dir, struct dentry *dentry)
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fail:
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mutex_unlock(&root->fs_info->fs_mutex);
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btrfs_btree_balance_dirty(root, nr);
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btrfs_throttle(root);
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return ret;
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}
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@ -644,6 +645,7 @@ static int btrfs_rmdir(struct inode *dir, struct dentry *dentry)
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fail:
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mutex_unlock(&root->fs_info->fs_mutex);
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btrfs_btree_balance_dirty(root, nr);
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btrfs_throttle(root);
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if (ret && !err)
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err = ret;
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@ -1010,6 +1012,7 @@ void btrfs_delete_inode(struct inode *inode)
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btrfs_end_transaction(trans, root);
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mutex_unlock(&root->fs_info->fs_mutex);
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btrfs_btree_balance_dirty(root, nr);
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btrfs_throttle(root);
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return;
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no_delete_lock:
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@ -1017,6 +1020,7 @@ no_delete_lock:
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btrfs_end_transaction(trans, root);
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mutex_unlock(&root->fs_info->fs_mutex);
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btrfs_btree_balance_dirty(root, nr);
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btrfs_throttle(root);
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no_delete:
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clear_inode(inode);
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}
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@ -1574,6 +1578,7 @@ fail:
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iput(inode);
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}
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btrfs_btree_balance_dirty(root, nr);
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btrfs_throttle(root);
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return err;
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}
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@ -1633,6 +1638,7 @@ fail:
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iput(inode);
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}
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btrfs_btree_balance_dirty(root, nr);
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btrfs_throttle(root);
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return err;
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}
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@ -1684,6 +1690,7 @@ fail:
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iput(inode);
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}
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btrfs_btree_balance_dirty(root, nr);
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btrfs_throttle(root);
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return err;
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}
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@ -1752,6 +1759,7 @@ out_unlock:
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if (drop_on_err)
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iput(inode);
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btrfs_btree_balance_dirty(root, nr);
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btrfs_throttle(root);
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return err;
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}
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@ -2117,6 +2125,7 @@ static void btrfs_truncate(struct inode *inode)
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BUG_ON(ret);
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mutex_unlock(&root->fs_info->fs_mutex);
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btrfs_btree_balance_dirty(root, nr);
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btrfs_throttle(root);
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}
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static int noinline create_subvol(struct btrfs_root *root, char *name,
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@ -2245,6 +2254,7 @@ fail:
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fail_commit:
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mutex_unlock(&root->fs_info->fs_mutex);
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btrfs_btree_balance_dirty(root, nr);
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btrfs_throttle(root);
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return ret;
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}
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@ -2287,6 +2297,7 @@ static int create_snapshot(struct btrfs_root *root, char *name, int namelen)
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fail_unlock:
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mutex_unlock(&root->fs_info->fs_mutex);
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btrfs_btree_balance_dirty(root, nr);
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btrfs_throttle(root);
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return ret;
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}
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@ -2827,6 +2838,7 @@ out_fail:
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iput(inode);
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}
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btrfs_btree_balance_dirty(root, nr);
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btrfs_throttle(root);
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return err;
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}
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@ -424,6 +424,7 @@ static int drop_dirty_roots(struct btrfs_root *tree_root,
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num_bytes = btrfs_root_used(&dirty->root->root_item);
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root = dirty->latest_root;
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root->fs_info->throttles++;
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while(1) {
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trans = btrfs_start_transaction(tree_root, 1);
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@ -447,6 +448,7 @@ static int drop_dirty_roots(struct btrfs_root *tree_root,
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mutex_lock(&tree_root->fs_info->fs_mutex);
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}
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BUG_ON(ret);
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root->fs_info->throttles--;
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num_bytes -= btrfs_root_used(&dirty->root->root_item);
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bytes_used = btrfs_root_used(&root->root_item);
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@ -484,6 +486,7 @@ int btrfs_write_ordered_inodes(struct btrfs_trans_handle *trans,
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u64 objectid = 0;
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int ret;
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root->fs_info->throttles++;
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while(1) {
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ret = btrfs_find_first_ordered_inode(
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&cur_trans->ordered_inode_tree,
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@ -523,6 +526,7 @@ int btrfs_write_ordered_inodes(struct btrfs_trans_handle *trans,
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mutex_lock(&root->fs_info->fs_mutex);
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mutex_lock(&root->fs_info->trans_mutex);
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}
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root->fs_info->throttles--;
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return 0;
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}
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