Dear Dave,
RH knowledge base article shows nice p_* commands
https://access.redhat.com/solutions/4490051
crash> p_super_block ffff9ad87724f000
(struct super_block *)0xffff9ad87724f000  dm-15
    .s_type - (struct file_system_type *)0xffffffffc1050460 - 'xfs'
    .s_flags = 0x0000000030810001 - RDONLY | POSIXACL | I_VERSION | [NOSEC] | [BORN]
    .s_blocksize - 4096
    .s_root - (struct dentry *)0x0000000000000000
    .s_bdev - (struct block_device *)0xffff9ab8431a8680
        .bd_inode - (struct inode *)0xffff9ab8431a8770
        .bd_super - (struct super_block *)0x0000000000000000 
        .bd_disk - (struct gendisk *)0xffff9ab878ace400  dm-15
        .bd_queue - (struct request_queue *)0xffff9ab779be1330
        .bd_mutex - (struct mutex *)0x0000000000000001 - not implemente
Do you know something about extension implemented this nice commend?
Cold you please find its author and ask him to publish it?
Thank you,
	Vasily Averin