[dm-devel] [git pull v3] device mapper changes for 5.8
Mike Snitzer
snitzer at redhat.com
Tue Jun 9 13:59:19 UTC 2020
[resending as v3 due to my From: email addr in v2 being inexplicably wrong]
Hi Linus,
I had some miscommunication with Mikulas on his -ENOMEM sleep and retry
changes for dm-crypt and dm-integrity, he no longer thinks them
appropriate: https://www.redhat.com/archives/dm-devel/2020-June/msg00061.html
So I dropped them via rebase and updated the tag (to avoid any
potential for linux-stable churn due to Mikulas' commits having
cc'd linux-stable). Hope that was the correct way forward...
For the following changes there is one dm-zoned-metadata.c conflict that
linux-next has been carrying for a while. See commit d77e96f277 ("Merge
remote-tracking branch 'device-mapper/for-next'") from next-20200605.
It resolves conflict from linux-block's commit 9398554fb3 ("block:
remove the_error_sector argument to blkdev_issue_flush").
The following changes since commit 2ef96a5bb12be62ef75b5828c0aab838ebb29cb8:
Linux 5.7-rc5 (2020-05-10 15:16:58 -0700)
are available in the Git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git tags/for-5.8/dm-changes
for you to fetch changes up to 64611a15ca9da91ff532982429c44686f4593b5f:
dm crypt: avoid truncating the logical block size (2020-06-05 14:59:59 -0400)
Please pull, thanks!
Mike
----------------------------------------------------------------
- Largest change for this cycle is the DM zoned target's metadata
version 2 feature that adds support for pairing regular block
devices with a zoned device to ease performance impact associated
with finite random zones of zoned device. Changes came in 3
batches: first prepared for and then added the ability to pair a
single regular block device, second was a batch of fixes to improve
zoned's reclaim heuristic, third removed the limitation of only
adding a single additional regular block device to allow many
devices. Testing has shown linear scaling as more devices are
added.
- Add new emulated block size (ebs) target that emulates a smaller
logical_block_size than a block device supports. Primary use-case
is to emulate "512e" devices that have 512 byte logical_block_size
and 4KB physical_block_size. This is useful to some legacy
applications otherwise wouldn't be ablee to be used on 4K devices
because they depend on issuing IO in 512 byte granularity.
- Add discard interfaces to DM bufio. First consumer of the interface
is the dm-ebs target that makes heavy use of dm-bufio.
- Fix DM crypt's block queue_limits stacking to not truncate
logic_block_size.
- Add Documentation for DM integrity's status line.
- Switch DMDEBUG from a compile time config option to instead use
dynamic debug via pr_debug.
- Fix DM multipath target's hueristic for how it manages
"queue_if_no_path" state internally. DM multipath now avoids
disabling "queue_if_no_path" unless it is actually needed (e.g. in
response to configure timeout or explicit "fail_if_no_path"
message). This fixes reports of spurious -EIO being reported back
to userspace application during fault tolerance testing with an NVMe
backend. Added various dynamic DMDEBUG messages to assist with
debugging queue_if_no_path in the future.
- Add a new DM multipath "Historical Service Time" Path Selector.
- Fix DM multipath's dm_blk_ioctl() to switch paths on IO error.
- Improve DM writecache target performance by using explicit
cache flushing for target's single-threaded usecase and a small
cleanup to remove unnecessary test in persistent_memory_claim.
- Other small cleanups in DM core, dm-persistent-data, and DM integrity.
----------------------------------------------------------------
Dmitry Baryshkov (1):
dm crypt: support using encrypted keys
Eric Biggers (1):
dm crypt: avoid truncating the logical block size
Gabriel Krisman Bertazi (1):
dm mpath: pass IO start time to path selector
Gustavo A. R. Silva (1):
dm: replace zero-length array with flexible-array
Hannes Reinecke (38):
dm zoned: add 'status' callback
dm zoned: add 'message' callback
dm zoned: store zone id within the zone structure and kill dmz_id()
dm zoned: use array for superblock zones
dm zoned: store device in struct dmz_sb
dm zoned: move fields from struct dmz_dev to dmz_metadata
dm zoned: introduce dmz_metadata_label() to format device name
dm zoned: Introduce dmz_dev_is_dying() and dmz_check_dev()
dm zoned: remove 'dev' argument from reclaim
dm zoned: replace 'target' pointer in the bio context
dm zoned: use dmz_zone_to_dev() when handling metadata I/O
dm zoned: add metadata logging functions
dm zoned: Reduce logging output on startup
dm zoned: ignore metadata zone in dmz_alloc_zone()
dm zoned: metadata version 2
dm: use dynamic debug instead of compile-time config option
dm zoned: remove spurious newlines from debugging messages
dm zoned: return NULL if dmz_get_zone_for_reclaim() fails to find a zone
dm zoned: separate random and cache zones
dm zoned: reclaim random zones when idle
dm zoned: start reclaim with sequential zones
dm zoned: terminate reclaim on congestion
dm zoned: remove leftover hunk for switching to sequential zones
dm zoned: add debugging message for reading superblocks
dm zoned: avoid unnecessary device recalulation for secondary superblock
dm zoned: improve logging messages for reclaim
dm zoned: add a 'reserved' zone flag
dm zoned: convert to xarray
dm zoned: allocate temporary superblock for tertiary devices
dm zoned: add device pointer to struct dm_zone
dm zoned: add metadata pointer to struct dmz_dev
dm zoned: per-device reclaim
dm zoned: move random and sequential zones into struct dmz_dev
dm zoned: support arbitrary number of devices
dm zoned: allocate zone by device index
dm zoned: select reclaim zone based on device index
dm zoned: prefer full zones for reclaim
dm zoned: check superblock location
Heinz Mauelshagen (2):
dm: add emulated block size target
dm ebs: pass discards down to underlying device
Khazhismel Kumykov (1):
dm mpath: add Historical Service Time Path Selector
Martin Wilck (1):
dm mpath: switch paths in dm_blk_ioctl() code path
Mike Snitzer (5):
dm: use DMDEBUG macros now that they use pr_debug variants
dm mpath: simplify __must_push_back
dm mpath: restrict queue_if_no_path state machine
dm mpath: enhance queue_if_no_path debugging
dm mpath: add DM device name to Failing/Reinstating path log messages
Mikulas Patocka (8):
dm bufio: implement discard
dm writecache: remove superfluous test in persistent_memory_claim
dm writecache: improve performance on DDR persistent memory (Optane)
dm bufio: delete unused and inefficient dm_bufio_discard_buffers
dm integrity: add status line documentation
dm bufio: clean up rbtree block ordering
dm bufio: introduce forget_buffer_locked
dm ebs: use dm_bufio_forget_buffers
Nathan Chancellor (1):
dm zoned: Avoid 64-bit division error in dmz_fixup_devices
YueHaibing (1):
dm integrity: remove set but not used variables
Zhiqiang Liu (1):
dm persistent data: switch exit_ro_spine to return void
Documentation/admin-guide/device-mapper/dm-ebs.rst | 51 +
.../admin-guide/device-mapper/dm-integrity.rst | 8 +
.../admin-guide/device-mapper/dm-zoned.rst | 62 +-
drivers/md/Kconfig | 20 +
drivers/md/Makefile | 3 +
drivers/md/dm-bufio.c | 109 +-
drivers/md/dm-crypt.c | 80 +-
drivers/md/dm-ebs-target.c | 471 +++++++++
drivers/md/dm-historical-service-time.c | 561 +++++++++++
drivers/md/dm-integrity.c | 6 +-
drivers/md/dm-log-writes.c | 2 +-
drivers/md/dm-mpath.c | 123 ++-
drivers/md/dm-path-selector.h | 2 +-
drivers/md/dm-queue-length.c | 2 +-
drivers/md/dm-raid.c | 2 +-
drivers/md/dm-raid1.c | 2 +-
drivers/md/dm-service-time.c | 2 +-
drivers/md/dm-stats.c | 2 +-
drivers/md/dm-stripe.c | 2 +-
drivers/md/dm-switch.c | 2 +-
drivers/md/dm-writecache.c | 42 +-
drivers/md/dm-zoned-metadata.c | 1046 +++++++++++++++-----
drivers/md/dm-zoned-reclaim.c | 210 ++--
drivers/md/dm-zoned-target.c | 463 ++++++---
drivers/md/dm-zoned.h | 113 ++-
drivers/md/dm.c | 11 +-
drivers/md/persistent-data/dm-btree-internal.h | 4 +-
drivers/md/persistent-data/dm-btree-spine.c | 6 +-
include/linux/device-mapper.h | 9 +-
include/linux/dm-bufio.h | 12 +
30 files changed, 2779 insertions(+), 649 deletions(-)
create mode 100644 Documentation/admin-guide/device-mapper/dm-ebs.rst
create mode 100644 drivers/md/dm-ebs-target.c
create mode 100644 drivers/md/dm-historical-service-time.c
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