• Linus Torvalds's avatar
    Merge branch 'for-4.12/block' of git://git.kernel.dk/linux-block · 69475292
    Linus Torvalds authored
    Pull block layer updates from Jens Axboe:
    
     - Add BFQ IO scheduler under the new blk-mq scheduling framework. BFQ
       was initially a fork of CFQ, but subsequently changed to implement
       fairness based on B-WF2Q+, a modified variant of WF2Q. BFQ is meant
       to be used on desktop type single drives, providing good fairness.
       From Paolo.
    
     - Add Kyber IO scheduler. This is a full multiqueue aware scheduler,
       using a scalable token based algorithm that throttles IO based on
       live completion IO stats, similary to blk-wbt. From Omar.
    
     - A series from Jan, moving users to separately allocated backing
       devices. This continues the work of separating backing device life
       times, solving various problems with hot removal.
    
     - A series of updates for lightnvm, mostly from Javier. Includes a
       'pblk' target that exposes an open channel SSD as a physical block
       device.
    
     - A series of fixes and improvements for nbd from Josef.
    
     - A series from Omar, removing queue sharing between devices on mostly
       legacy drivers. This helps us clean up other bits, if we know that a
       queue only has a single device backing. This has been overdue for
       more than a decade.
    
     - Fixes for the blk-stats, and improvements to unify the stats and user
       windows. This both improves blk-wbt, and enables other users to
       register a need to receive IO stats for a device. From Omar.
    
     - blk-throttle improvements from Shaohua. This provides a scalable
       framework for implementing scalable priotization - particularly for
       blk-mq, but applicable to any type of block device. The interface is
       marked experimental for now.
    
     - Bucketized IO stats for IO polling from Stephen Bates. This improves
       efficiency of polled workloads in the presence of mixed block size
       IO.
    
     - A few fixes for opal, from Scott.
    
     - A few pulls for NVMe, including a lot of fixes for NVMe-over-fabrics.
       From a variety of folks, mostly Sagi and James Smart.
    
     - A series from Bart, improving our exposed info and capabilities from
       the blk-mq debugfs support.
    
     - A series from Christoph, cleaning up how handle WRITE_ZEROES.
    
     - A series from Christoph, cleaning up the block layer handling of how
       we track errors in a request. On top of being a nice cleanup, it also
       shrinks the size of struct request a bit.
    
     - Removal of mg_disk and hd (sorry Linus) by Christoph. The former was
       never used by platforms, and the latter has outlived it's usefulness.
    
     - Various little bug fixes and cleanups from a wide variety of folks.
    
    * 'for-4.12/block' of git://git.kernel.dk/linux-block: (329 commits)
      block: hide badblocks attribute by default
      blk-mq: unify hctx delay_work and run_work
      block: add kblock_mod_delayed_work_on()
      blk-mq: unify hctx delayed_run_work and run_work
      nbd: fix use after free on module unload
      MAINTAINERS: bfq: Add Paolo as maintainer for the BFQ I/O scheduler
      blk-mq-sched: alloate reserved tags out of normal pool
      mtip32xx: use runtime tag to initialize command header
      scsi: Implement blk_mq_ops.show_rq()
      blk-mq: Add blk_mq_ops.show_rq()
      blk-mq: Show operation, cmd_flags and rq_flags names
      blk-mq: Make blk_flags_show() callers append a newline character
      blk-mq: Move the "state" debugfs attribute one level down
      blk-mq: Unregister debugfs attributes earlier
      blk-mq: Only unregister hctxs for which registration succeeded
      blk-mq-debugfs: Rename functions for registering and unregistering the mq directory
      blk-mq: Let blk_mq_debugfs_register() look up the queue name
      blk-mq: Register <dev>/queue/mq after having registered <dev>/queue
      ide-pm: always pass 0 error to ide_complete_rq in ide_do_devset
      ide-pm: always pass 0 error to __blk_end_request_all
      ..
    69475292
sg.c 72.5 KB