By Neil Brown  October 25, 2017, lwn.net

• A block layer introduction part 1: the bio layer
• [PATCH] block: replace bi_bdev with a gendisk pointer and partitions index
• [PATCH] blk: improve order of bio handling in generic_make_request()
• [PATCH] block: initial patch for on-stack per-task plugging
• [PATCH] block: provide a direct_make_request …

Linux Block IO: Introducing Multi-queue SSD Access on Multi-core Systems

Jonathan Corbet  June 5, 2013, lwn.net

• The multiqueue block layer
• Linux Block IO: Introducing Multi-queue SSD Access on Multi-core Systems
• null_blk.c

The kernel's block layer is charged with managing I/O to the system's block ("disk drive") devices. It was designed in an era when a high-performance drive …

• http://man7.org/linux/man-pages/man8/lsblk.8.html

• https://git.kernel.org/pub/scm/utils/util-linux/util-linux.git

• https://github.com/karelzak/util-linux

The lsblk command is part of the util-linux package. lsblk lists information about all available or the specified block devices. The lsblk command reads the sysfs …

https://linux.die.net/man/1/iostat

IO statistics
        /proc/diskstats
        /sys/block/<disk>/stat
        /sys/block/<disk>/<partiton>/stat

    -t      Print the time for each report displayed. The timestamp format may
            depend on the value of the S_TIME_FORMAT environment variable 

    -x      Display extended statistics.

The interval parameter '-d' specifies …