Damien Le Moal a805a4fa4f block: introduce zone_write_granularity limit ... Per ZBC and ZAC specifications, host-managed SMR hard-disks mandate that all writes into sequential write required zones be aligned to the device physical block size. However, NVMe ZNS does not have this constraint and allows write operations into sequential zones to be aligned to the device logical block size. This inconsistency does not help with software portability across device types. To solve this, introduce the zone_write_granularity queue limit to indicate the alignment constraint, in bytes, of write operations into zones of a zoned block device. This new limit is exported as a read-only sysfs queue attribute and the helper blk_queue_zone_write_granularity() introduced for drivers to set this limit. The function blk_queue_set_zoned() is modified to set this new limit to the device logical block size by default. NVMe ZNS devices as well as zoned nullb devices use this default value as is. The scsi disk driver is modified to execute the blk_queue_zone_write_granularity() helper to set the zone write granularity of host-managed SMR disks to the disk physical block size. The accessor functions queue_zone_write_granularity() and bdev_zone_write_granularity() are also introduced. Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@edc.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>		2021-02-10 07:44:40 -07:00
..
partitions	block: use blk_queue_set_zoned in add_partition()	2021-02-10 07:44:40 -07:00
badblocks.c	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
bfq-cgroup.c	bfq: fix blkio cgroup leakage v4	2020-08-18 07:48:08 -07:00
bfq-iosched.c	bfq: Use only idle IO periods for think time calculations	2021-01-27 09:16:00 -07:00
bfq-iosched.h	block, bfq: make waker-queue detection more robust	2021-01-25 14:18:37 -07:00
bfq-wf2q.c	bfq: don't duplicate code for different paths	2021-01-24 18:20:47 -07:00
bio-integrity.c	block: use bi_max_vecs to find the bvec pool	2021-02-08 08:33:16 -07:00
bio.c	block: use bi_max_vecs to find the bvec pool	2021-02-08 08:33:16 -07:00
blk-cgroup-rwstat.c	blk-cgroup: separate out blkg_rwstat under CONFIG_BLK_CGROUP_RWSTAT	2019-11-07 12:28:13 -07:00
blk-cgroup-rwstat.h	blk-cgroup: separate out blkg_rwstat under CONFIG_BLK_CGROUP_RWSTAT	2019-11-07 12:28:13 -07:00
blk-cgroup.c	blk-cgroup: Remove obsolete macro	2021-01-28 07:33:36 -07:00
blk-core.c	block: skip bio_check_eod for partition-remapped bios	2021-01-25 11:41:34 -07:00
blk-crypto-fallback.c	blk-crypto: use bio_kmalloc in blk_crypto_clone_bio	2021-01-27 09:51:48 -07:00
blk-crypto-internal.h	block: make blk_crypto_rq_bio_prep() able to fail	2020-10-05 10:47:43 -06:00
blk-crypto.c	block: store a block_device pointer in struct bio	2021-01-24 18:17:20 -07:00
blk-exec.c	block: drop removed argument from kernel-doc of blk_execute_rq()	2021-01-29 07:43:29 -07:00
blk-flush.c	block: use an on-stack bio in blkdev_issue_flush	2021-01-27 09:51:48 -07:00
blk-integrity.c	block: remove the unused blk_integrity_merge_bio export	2020-10-06 07:29:53 -06:00
blk-ioc.c	block: remove retry loop in ioc_release_fn()	2020-07-16 10:22:15 -06:00
blk-iocost.c	blk-iocost: fix NULL iocg deref from racing against initialization	2021-01-05 11:33:32 -07:00
blk-iolatency.c	block: Remove redundant 'return' statement	2020-10-08 07:59:48 -06:00
blk-lib.c	block: move the start_sect field to struct block_device	2020-12-01 14:53:40 -07:00
blk-map.c	block: fix bmd->is_null_mapped initialization	2020-09-23 09:18:39 -06:00
blk-merge.c	block: store a block_device pointer in struct bio	2021-01-24 18:17:20 -07:00
blk-mq-cpumap.c	blk-mq: remove the calling of local_memory_node()	2020-10-20 07:08:17 -06:00
blk-mq-debugfs-zoned.c	block: Cleanup license notice	2019-01-17 21:21:40 -07:00
blk-mq-debugfs.c	block-5.11-2021-01-10	2021-01-10 12:53:08 -08:00
blk-mq-debugfs.h	blk-mq: no need to check return value of debugfs_create functions	2019-06-13 03:00:30 -06:00
blk-mq-pci.c	block: Fix blk_mq_*_map_queues() kernel-doc headers	2019-05-31 15:12:34 -06:00
blk-mq-rdma.c	block: Fix blk_mq_*_map_queues() kernel-doc headers	2019-05-31 15:12:34 -06:00
blk-mq-sched.c	block: remove the request_queue to argument request based tracepoints	2020-12-04 09:42:00 -07:00
blk-mq-sched.h	block-5.10-2020-10-12	2020-10-13 12:12:44 -07:00
blk-mq-sysfs.c	blk-mq: move cancel of hctx->run_work to the front of blk_exit_queue	2020-10-09 12:46:28 -06:00
blk-mq-tag.c	block-mq: fix comments in blk_mq_queue_tag_busy_iter	2020-09-29 08:11:00 -06:00
blk-mq-tag.h	blk-mq: Relocate hctx_may_queue()	2020-09-03 15:20:47 -06:00
blk-mq-virtio.c	blk-mq: Fix typo in comment	2020-03-17 20:55:21 +01:00
blk-mq.c	blk-mq: Improve performance of non-mq IO schedulers with multiple HW queues	2021-01-24 18:19:46 -07:00
blk-mq.h	blk-mq: update arg in comment of blk_mq_map_queue	2020-12-12 11:13:41 -07:00
blk-pm.c	scsi: block: Fix a race in the runtime power management code	2020-12-09 11:41:41 -05:00
blk-pm.h	scsi: block: Do not accept any requests while suspended	2020-12-09 11:41:42 -05:00
blk-rq-qos.c	Revert "blk-rq-qos: remove redundant finish_wait to rq_qos_wait."	2020-07-15 09:33:37 -06:00
blk-rq-qos.h	blk-rq-qos: fix first node deletion of rq_qos_del()	2019-10-15 10:13:13 -06:00
blk-settings.c	block: introduce zone_write_granularity limit	2021-02-10 07:44:40 -07:00
blk-stat.c	blk-stat: make q->stats->lock irqsafe	2020-09-01 16:48:46 -06:00
blk-stat.h	block: deactivate blk_stat timer in wbt_disable_default()	2018-12-12 06:47:51 -07:00
blk-sysfs.c	block: introduce zone_write_granularity limit	2021-02-10 07:44:40 -07:00
blk-throttle.c	block: store a block_device pointer in struct bio	2021-01-24 18:17:20 -07:00
blk-timeout.c	block: blk-timeout: delete duplicated word	2020-07-31 16:29:47 -06:00
blk-wbt.c	blk: wbt: remove unused parameter from wbt_should_throttle	2021-01-26 13:13:00 -07:00
blk-wbt.h	blk-wbt: remove wbt_update_limits	2020-05-29 16:30:39 -06:00
blk-zoned.c	block: Improve blk_revalidate_disk_zones() checks	2020-12-07 17:34:21 -07:00
blk.h	block: use bi_max_vecs to find the bvec pool	2021-02-08 08:33:16 -07:00
bounce.c	block: inherit BIO_REMAPPED when cloning bios	2021-01-26 08:50:01 -07:00
bsg-lib.c	block: drop double zeroing	2020-09-23 09:18:13 -06:00
bsg.c	block: remove unnecessary argument from blk_execute_rq	2021-01-24 21:52:39 -07:00
cmdline-parser.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
elevator.c	block: fix comment and add lockdep assert	2020-10-09 12:34:06 -06:00
genhd.c	block: remove typo in kernel-doc of set_disk_ro()	2021-01-29 07:15:50 -07:00
ioctl.c	block: move the policy field to struct block_device	2020-12-01 14:53:40 -07:00
ioprio.c	block: grant IOPRIO_CLASS_RT to CAP_SYS_NICE	2020-09-01 19:38:33 -06:00
Kconfig	blk-wbt: Remove obsolete multiqueue I/O scheduling comment	2020-09-01 16:49:26 -06:00
Kconfig.iosched	treewide: replace '---help---' in Kconfig files with 'help'	2020-06-14 01:57:21 +09:00
keyslot-manager.c	block/keyslot-manager: prevent crash when num_slots=1	2020-11-20 11:52:52 -07:00
kyber-iosched.c	blk-mq: Improve performance of non-mq IO schedulers with multiple HW queues	2021-01-24 18:19:46 -07:00
Makefile	blk-mq: merge blk-softirq.c into blk-mq.c	2020-06-24 09:15:56 -06:00
mq-deadline.c	Revert "blk-mq, elevator: Count requests per hctx to improve performance"	2021-01-24 18:19:46 -07:00
opal_proto.h	block: sed-opal: Change the check condition for regular session validity	2020-03-12 08:00:10 -06:00
scsi_ioctl.c	block: remove unnecessary argument from blk_execute_rq	2021-01-24 21:52:39 -07:00
sed-opal.c	block: sed-opal: Change the check condition for regular session validity	2020-03-12 08:00:10 -06:00
t10-pi.c	block: Allow t10-pi to be modular	2020-01-06 20:59:04 -07:00