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Btrfs: Avoid orphan inodes cleanup while replaying log

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We do log replay in a single transaction, so it's not good to do unbound
operations. This patch cleans up orphan inodes cleanup after replaying
the log. It also avoids doing other unbound operations such as truncating
a file during replaying log. These unbound operations are postponed to
the orphan inode cleanup stage.

Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Yan, Zheng
2009-11-12 09:34:40 +00:00
committed by Chris Mason
parent c216775458
commit c71bf099ab
5 changed files with 55 additions and 36 deletions
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19
fs/btrfs/inode.c
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@ -2093,16 +2093,17 @@ void btrfs_orphan_cleanup(struct btrfs_root *root)
struct inode *inode;
int ret = 0, nr_unlink = 0, nr_truncate = 0;
path = btrfs_alloc_path();
if (!path)
if (!xchg(&root->clean_orphans, 0))
return;
path = btrfs_alloc_path();
BUG_ON(!path);
path->reada = -1;
key.objectid = BTRFS_ORPHAN_OBJECTID;
btrfs_set_key_type(&key, BTRFS_ORPHAN_ITEM_KEY);
key.offset = (u64)-1;
while (1) {
ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
if (ret < 0) {
@ -3298,6 +3299,11 @@ void btrfs_delete_inode(struct inode *inode)
}
btrfs_wait_ordered_range(inode, 0, (u64)-1);
if (root->fs_info->log_root_recovering) {
BUG_ON(!list_empty(&BTRFS_I(inode)->i_orphan));
goto no_delete;
}
if (inode->i_nlink > 0) {
BUG_ON(btrfs_root_refs(&root->root_item) != 0);
goto no_delete;
@ -3705,6 +3711,13 @@ struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry)
}
srcu_read_unlock(&root->fs_info->subvol_srcu, index);
if (root != sub_root) {
down_read(&root->fs_info->cleanup_work_sem);
if (!(inode->i_sb->s_flags & MS_RDONLY))
btrfs_orphan_cleanup(sub_root);
up_read(&root->fs_info->cleanup_work_sem);
}
return inode;
}