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.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
iQEcBAABAgAGBQJTmavIAAoJEMUj8QotnQNay/EIAJI6lEFlQK3gG830+Yaw1m2U
7mnnX/Rd/N6RnccyhmFqk7Xu0REM7gJEgWicTQjR58La2DKFi072N0mwgHgHfB8f
1oOvUKN5Nb/a1CmRcVzSO0sbYcJn9I1r+k0buqfFHivU68wuedG+MrVya3YzOjvC
63MQiu4+3icDprcToxn+etz75FhrFps5QAsS0cH6t1VZqFCGIzxqgUKgY8zGo1CH
P9hkYpJhhJe2aDh4vlFvpFYVFXt9zPoR+MkqXFW6Dn9GbR36gGaldTwnyhapla4N
XYHDEdETcTqm2srOM5wW+jD0p+Id9/Lmd5Ld5J2zyARCYn/EG/SDCbiaVqOxEnc=
=tv1B
-----END PGP SIGNATURE-----
Merge tag 'dm-3.16-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
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
0e04c641b1