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