• Linus Torvalds's avatar
    Merge tag 'dm-3.16-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm · 0e04c641
    Linus Torvalds authored
    Pull device mapper updates from Mike Snitzer:
     "This pull request is later than I'd have liked because I was waiting
      for some performance data to help finally justify sending the
      long-standing dm-crypt cpu scalability improvements upstream.
    
      Unfortunately we came up short, so those dm-crypt changes will
      continue to wait, but it seems we're not far off.
    
       . Add dm_accept_partial_bio interface to DM core to allow DM targets
         to only process a portion of a bio, the remainder being sent in the
         next bio.  This enables the old dm snapshot-origin target to only
         split write bios on chunk boundaries, read bios are now sent to the
         origin device unchanged.
    
       . Add DM core support for disabling WRITE SAME if the underlying SCSI
         layer disables it due to command failure.
    
       . Reduce lock contention in DM's bio-prison.
    
       . A few small cleanups and fixes to dm-thin and dm-era"
    
    * tag 'dm-3.16-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
      dm thin: update discard_granularity to reflect the thin-pool blocksize
      dm bio prison: implement per bucket locking in the dm_bio_prison hash table
      dm: remove symbol export for dm_set_device_limits
      dm: disable WRITE SAME if it fails
      dm era: check for a non-NULL metadata object before closing it
      dm thin: return ENOSPC instead of EIO when error_if_no_space enabled
      dm thin: cleanup noflush_work to use a proper completion
      dm snapshot: do not split read bios sent to snapshot-origin target
      dm snapshot: allocate a per-target structure for snapshot-origin target
      dm: introduce dm_accept_partial_bio
      dm: change sector_count member in clone_info from sector_t to unsigned
    0e04c641
dm.c 66.5 KB