lid_t blid; /* lid of pseudo buffer? */
lid_t atlhead; /* anonymous tlock list head */
lid_t atltail; /* anonymous tlock list tail */
+ spinlock_t ag_lock; /* protects active_ag */
struct list_head anon_inode_list; /* inodes having anonymous txns */
/*
* rdwrlock serializes xtree between reads & writes and synchronizes