• Linus Torvalds's avatar
    Merge tag 'dm-4.3-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm · 1e1a4e8f
    Linus Torvalds authored
    Pull device mapper update from Mike Snitzer:
    
     - a couple small cleanups in dm-cache, dm-verity, persistent-data's
       dm-btree, and DM core.
    
     - a 4.1-stable fix for dm-cache that fixes the leaking of deferred bio
       prison cells
    
     - a 4.2-stable fix that adds feature reporting for the dm-stats
       features added in 4.2
    
     - improve DM-snapshot to not invalidate the on-disk snapshot if
       snapshot device write overflow occurs; but a write overflow triggered
       through the origin device will still invalidate the snapshot.
    
     - optimize DM-thinp's async discard submission a bit now that late bio
       splitting has been included in block core.
    
     - switch DM-cache's SMQ policy lock from using a mutex to a spinlock;
       improves performance on very low latency devices (eg. NVMe SSD).
    
     - document DM RAID 4/5/6's discard support
    
    [ I did not pull the slab changes, which weren't appropriate for this
      tree, and weren't obviously the right thing to do anyway.  At the very
      least they need some discussion and explanation before getting merged.
    
      Because not pulling the actual tagged commit but doing a partial pull
      instead, this merge commit thus also obviously is missing the git
      signature from the original tag ]
    
    * tag 'dm-4.3-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
      dm cache: fix use after freeing migrations
      dm cache: small cleanups related to deferred prison cell cleanup
      dm cache: fix leaking of deferred bio prison cells
      dm raid: document RAID 4/5/6 discard support
      dm stats: report precise_timestamps and histogram in @stats_list output
      dm thin: optimize async discard submission
      dm snapshot: don't invalidate on-disk image on snapshot write overflow
      dm: remove unlikely() before IS_ERR()
      dm: do not override error code returned from dm_get_device()
      dm: test return value for DM_MAPIO_SUBMITTED
      dm verity: remove unused mempool
      dm cache: move wake_waker() from free_migrations() to where it is needed
      dm btree remove: remove unused function get_nr_entries()
      dm btree: remove unused "dm_block_t root" parameter in btree_split_sibling()
      dm cache policy smq: change the mutex to a spinlock
    1e1a4e8f
dm-snap.c 56.9 KB