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authorLinus Torvalds <torvalds@linux-foundation.org>2020-06-06 00:45:03 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2020-06-06 00:45:03 +0200
commitb25c6644bfd3affd7d0127ce95c5c96c155a7515 (patch)
tree9ef9c0fe74a08b7baf3a3c3753368b0f481b581f /fs/fs-writeback.c
parentMerge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi (diff)
parentdm crypt: avoid truncating the logical block size (diff)
downloadlinux-b25c6644bfd3affd7d0127ce95c5c96c155a7515.tar.xz
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Merge tag 'for-5.8/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Pull device mapper updates from Mike Snitzer: - The 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 the performance impact associated with finite random zones of zoned device. The changes came in three batches: the first prepared for and then added the ability to pair a single regular block device, the second was a batch of fixes to improve zoned's reclaim heuristic, and the 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 The 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 that otherwise wouldn't be able 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. * tag 'for-5.8/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: (62 commits) dm crypt: avoid truncating the logical block size dm mpath: add DM device name to Failing/Reinstating path log messages dm mpath: enhance queue_if_no_path debugging dm mpath: restrict queue_if_no_path state machine dm mpath: simplify __must_push_back dm zoned: check superblock location dm zoned: prefer full zones for reclaim dm zoned: select reclaim zone based on device index dm zoned: allocate zone by device index dm zoned: support arbitrary number of devices dm zoned: move random and sequential zones into struct dmz_dev dm zoned: per-device reclaim dm zoned: add metadata pointer to struct dmz_dev dm zoned: add device pointer to struct dm_zone dm zoned: allocate temporary superblock for tertiary devices dm zoned: convert to xarray dm zoned: add a 'reserved' zone flag dm zoned: improve logging messages for reclaim dm zoned: avoid unnecessary device recalulation for secondary superblock dm zoned: add debugging message for reading superblocks ...
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