/sys/devices/virtual/block/dm-4/queue
Directories:

• /sys/devices/virtual/block/dm-4

Files:

• io_poll_delay
• max_integrity_segments
• zoned
• scheduler
• io_poll
• discard_zeroes_data
• minimum_io_size
• write_same_max_bytes
• max_segments
• dax
• physical_block_size
• logical_block_size
• nr_requests
• write_cache
• max_segment_size
• rotational
• discard_max_bytes
• add_random
• discard_max_hw_bytes
• optimal_io_size
• chunk_sectors
• read_ahead_kb
• max_discard_segments
• write_zeroes_max_bytes
• nomerges
• wbt_lat_usec
• fua
• discard_granularity
• rq_affinity
• max_sectors_kb
• hw_sector_size
• max_hw_sectors_kb
• iostats