Hi, There's a problem in btrfs_readdir that tries to lock a root node with one being held. This happens when NFS calls vfs_readdir function with a nfs specific filldir function pointer. This filldir function, called with the lock held calls btrfs_lookup, which tries to take the same lock. So, it keeps waiting on lock_page indefinitely - a deadlock. This is not seen if the inode is RAM in which case, lookup is not called.
Why can't we allow multiple readers to read a page ? Please clarify. Balaji Rao -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
