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aaa53168cbcc486ca1927faac00bd99e81d4ff04
linux/drivers/md
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Mikulas Patocka aaa53168cb dm: optimize flushes 
Device mapper sends flush bios to all the targets and the targets send it
to the underlying device. That may be inefficient, for example if a table
contains 10 linear targets pointing to the same physical device, then
device mapper would send 10 flush bios to that device - despite the fact
that only one bio would be sufficient.

This commit optimizes the flush behavior. It introduces a per-target
variable flush_bypasses_map - it is set when the target supports flush
optimization - currently, the dm-linear and dm-stripe targets support it.
When all the targets in a table have flush_bypasses_map,
flush_bypasses_map on the table is set. __send_empty_flush tests if the
table has flush_bypasses_map - and if it has, no flush bios are sent to
the targets via the "map" method and the list dm_table->devices is
iterated and the flush bios are sent to each member of the list.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Reviewed-by: Mike Snitzer <snitzer@kernel.org>
Suggested-by: Yang Yang <yang.yang@vivo.com>
2024-06-26 11:32:39 -04:00
..
bcache
block: move the raid_partial_stripes_expensive flag into the features field
2024-06-20 06:53:15 -06:00
dm-vdo
Merge tag 'pull-bd_inode-1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2024-05-21 09:51:42 -07:00
persistent-data
dm: update relevant MODULE_AUTHOR entries to latest dm-devel mailing list
2024-02-20 14:22:55 -05:00
dm-audit.c
dm: add missing SPDX-License-Indentifiers
2023-02-14 14:23:06 -05:00
dm-audit.h
dm: introduce audit event module for device mapper
2021-10-27 16:53:47 -04:00
dm-bio-prison-v1.c
dm: update relevant MODULE_AUTHOR entries to latest dm-devel mailing list
2024-02-20 14:22:55 -05:00
dm-bio-prison-v1.h
dm bio prison v1: add dm_cell_key_has_valid_range
2023-03-30 15:57:51 -04:00
dm-bio-prison-v2.c
dm: use bio_list_merge_init
2024-04-01 11:53:37 -06:00
dm-bio-prison-v2.h
dm: change "unsigned" to "unsigned int"
2023-02-14 14:23:06 -05:00
dm-bio-record.h
dm: add missing SPDX-License-Indentifiers
2023-02-14 14:23:06 -05:00
dm-bufio.c
dm: update relevant MODULE_AUTHOR entries to latest dm-devel mailing list
2024-02-20 14:22:55 -05:00
dm-builtin.c
dm: adjust EXPORT_SYMBOL() to follow functions immediately
2023-02-14 14:23:07 -05:00
dm-cache-background-tracker.c
dm: change "unsigned" to "unsigned int"
2023-02-14 14:23:06 -05:00
dm-cache-background-tracker.h
dm: change "unsigned" to "unsigned int"
2023-02-14 14:23:06 -05:00
dm-cache-block-types.h
dm: add missing SPDX-License-Indentifiers
2023-02-14 14:23:06 -05:00
dm-cache-metadata.c
Merge tag 'mm-stable-2023-11-01-14-33' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2023-11-02 19:38:47 -10:00
dm-cache-metadata.h
dm: change "unsigned" to "unsigned int"
2023-02-14 14:23:06 -05:00
dm-cache-policy-internal.h
dm: add missing empty lines
2023-02-14 14:23:06 -05:00
dm-cache-policy-smq.c
dm: update relevant MODULE_AUTHOR entries to latest dm-devel mailing list
2024-02-20 14:22:55 -05:00
dm-cache-policy.c
dm: change "unsigned" to "unsigned int"
2023-02-14 14:23:06 -05:00
dm-cache-policy.h
dm: address indent/space issues
2023-02-14 14:23:06 -05:00
dm-cache-target.c
block: remove the discard_alignment flag
2024-06-20 06:53:14 -06:00
dm-clone-metadata.c
bitmap: introduce generic optimized bitmap_size()
2024-04-01 10:49:28 +01:00
dm-clone-metadata.h
dm clone metadata: Fix return type of dm_clone_nr_of_hydrated_regions()
2020-03-27 14:42:51 -04:00
dm-clone-target.c
block: remove the discard_alignment flag
2024-06-20 06:53:14 -06:00
dm-core.h
dm: optimize flushes
2024-06-26 11:32:39 -04:00
dm-crypt.c
block: remove the blk_integrity_profile structure
2024-06-14 10:20:06 -06:00
dm-delay.c
dm-delay: remove timer_lock
2024-05-09 09:10:58 -04:00
dm-dust.c
dm: update relevant MODULE_AUTHOR entries to latest dm-devel mailing list
2024-02-20 14:22:55 -05:00
dm-ebs-target.c
dm: update relevant MODULE_AUTHOR entries to latest dm-devel mailing list
2024-02-20 14:22:55 -05:00
dm-era-target.c
dm: use bio_list_merge_init
2024-04-01 11:53:37 -06:00
dm-exception-store.c
dm: change "unsigned" to "unsigned int"
2023-02-14 14:23:06 -05:00
dm-exception-store.h
dm: avoid spaces before function arguments or in favour of tabs
2023-02-14 14:23:06 -05:00
dm-flakey.c
dm: update relevant MODULE_AUTHOR entries to latest dm-devel mailing list
2024-02-20 14:22:55 -05:00
dm-ima.c
dm: avoid inline filenames
2023-02-14 14:23:07 -05:00
dm-ima.h
dm: avoid inline filenames
2023-02-14 14:23:07 -05:00
dm-init.c
dm: open code dm_get_dev_t in dm_init_init
2023-06-05 10:57:40 -06:00
dm-integrity.c
block: move integrity information into queue_limits
2024-06-14 10:20:07 -06:00
dm-io-rewind.c
dm: avoid void function return statements
2023-02-14 14:23:07 -05:00
dm-io-tracker.h
dm: add missing SPDX-License-Indentifiers
2023-02-14 14:23:06 -05:00
dm-io.c
dm io: Support IO priority
2024-02-20 14:22:51 -05:00
dm-ioctl.c
dm ioctl: update DM_DRIVER_EMAIL to new dm-devel mailing list
2024-02-20 14:22:55 -05:00
dm-kcopyd.c
dm io: Support IO priority
2024-02-20 14:22:51 -05:00
dm-linear.c
dm: optimize flushes
2024-06-26 11:32:39 -04:00
dm-log-userspace-base.c
dm: update relevant MODULE_AUTHOR entries to latest dm-devel mailing list
2024-02-20 14:22:55 -05:00
dm-log-userspace-transfer.c
dm: avoid split of quoted strings where possible
2023-02-14 14:23:07 -05:00
dm-log-userspace-transfer.h
dm: add missing SPDX-License-Indentifiers
2023-02-14 14:23:06 -05:00
dm-log-writes.c
dm: always manage discard support in terms of max_hw_discard_sectors
2024-05-20 15:51:19 -04:00
dm-log.c
dm: update relevant MODULE_AUTHOR entries to latest dm-devel mailing list
2024-02-20 14:22:55 -05:00
dm-mpath.c
dm: use bio_list_merge_init
2024-04-01 11:53:37 -06:00
dm-mpath.h
dm: change "unsigned" to "unsigned int"
2023-02-14 14:23:06 -05:00
dm-path-selector.c
dm: adjust EXPORT_SYMBOL() to follow functions immediately
2023-02-14 14:23:07 -05:00
dm-path-selector.h
dm: avoid spaces before function arguments or in favour of tabs
2023-02-14 14:23:06 -05:00
dm-ps-historical-service-time.c
dm: add missing SPDX-License-Indentifiers
2023-02-14 14:23:06 -05:00
dm-ps-io-affinity.c
dm: address space issues relative to switch/while/for/...
2023-02-14 14:23:06 -05:00
dm-ps-queue-length.c
dm: avoid spaces before function arguments or in favour of tabs
2023-02-14 14:23:06 -05:00
dm-ps-round-robin.c
dm: update relevant MODULE_AUTHOR entries to latest dm-devel mailing list
2024-02-20 14:22:55 -05:00
dm-ps-service-time.c
dm: avoid spaces before function arguments or in favour of tabs
2023-02-14 14:23:06 -05:00
dm-raid1.c
dm io: Support IO priority
2024-02-20 14:22:51 -05:00
dm-raid.c
md: replace last_sync_action with new enum type
2024-06-12 16:32:57 +00:00
dm-region-hash.c
dm: update relevant MODULE_AUTHOR entries to latest dm-devel mailing list
2024-02-20 14:22:55 -05:00
dm-rq.c
dm: avoid using symbolic permissions
2023-02-14 14:23:07 -05:00
dm-rq.h
dm: change "unsigned" to "unsigned int"
2023-02-14 14:23:06 -05:00
dm-snap-persistent.c
dm io: Support IO priority
2024-02-20 14:22:51 -05:00
dm-snap-transient.c
dm: avoid split of quoted strings where possible
2023-02-14 14:23:07 -05:00
dm-snap.c
dm: always manage discard support in terms of max_hw_discard_sectors
2024-05-20 15:51:19 -04:00
dm-stats.c
dm stats: limit the number of entries
2024-01-30 14:06:44 -05:00
dm-stats.h
dm stats: check for and propagate alloc_percpu failure
2023-03-16 13:37:06 -04:00
dm-stripe.c
dm: optimize flushes
2024-06-26 11:32:39 -04:00
dm-switch.c
dm: add helper macro for simple DM target module init and exit
2023-04-11 12:09:08 -04:00
dm-sysfs.c
dm sysfs: make kobj_type structure constant
2023-02-14 14:23:08 -05:00
dm-table.c
dm: optimize flushes
2024-06-26 11:32:39 -04:00
dm-target.c
dm: always manage discard support in terms of max_hw_discard_sectors
2024-05-20 15:51:19 -04:00
dm-thin-metadata.c
Merge tag 'for-6.5/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2023-06-30 12:16:00 -07:00
dm-thin-metadata.h
dm: add missing SPDX-License-Indentifiers
2023-02-14 14:23:06 -05:00
dm-thin.c
Merge tag 'for-6.10/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2024-05-21 11:43:11 -07:00
dm-uevent.c
dm: avoid spaces before function arguments or in favour of tabs
2023-02-14 14:23:06 -05:00
dm-uevent.h
dm: fix undue/missing spaces
2023-02-14 14:23:06 -05:00
dm-unstripe.c
dm: add helper macro for simple DM target module init and exit
2023-04-11 12:09:08 -04:00
dm-verity-fec.c
dm verity: Fix IO priority lost when reading FEC and hash
2024-02-20 14:22:55 -05:00
dm-verity-fec.h
dm: change "unsigned" to "unsigned int"
2023-02-14 14:23:06 -05:00
dm-verity-loadpin.c
dm: verity-loadpin: Add NULL pointer check for 'bdev' parameter
2023-06-28 10:43:04 -07:00
dm-verity-target.c
Merge tag 'for-6.9/dm-bh-wq' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2024-03-13 09:46:51 -07:00
dm-verity-verify-sig.c
dm: add missing SPDX-License-Indentifiers
2023-02-14 14:23:06 -05:00
dm-verity-verify-sig.h
dm: add missing SPDX-License-Indentifiers
2023-02-14 14:23:06 -05:00
dm-verity.h
dm-verity: Convert from tasklet to BH workqueue
2024-03-02 10:30:36 -05:00
dm-writecache.c
dm: update relevant MODULE_AUTHOR entries to latest dm-devel mailing list
2024-02-20 14:22:55 -05:00
dm-zero.c
dm: always manage discard support in terms of max_hw_discard_sectors
2024-05-20 15:51:19 -04:00
dm-zone.c
Merge branch 'for-6.11/block-limits' into for-6.11/block
2024-06-19 08:14:49 -06:00
dm-zoned-metadata.c
block: remove gfp_flags from blkdev_zone_mgmt
2024-02-12 08:41:16 -07:00
dm-zoned-reclaim.c
dm kcopyd: avoid useless atomic operations
2021-06-04 12:07:24 -04:00
dm-zoned-target.c
block: move the zoned flag into the features field
2024-06-19 07:58:28 -06:00
dm-zoned.h
dm/dm-zoned: Use the enum req_op type
2022-07-14 12:14:31 -06:00
dm.c
dm: optimize flushes
2024-06-26 11:32:39 -04:00
dm.h
dm: Call dm_revalidate_zones() after setting the queue limits
2024-06-15 20:42:20 -06:00
Kconfig
Merge tag 'kbuild-v6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
2024-03-21 14:41:00 -07:00
Makefile
dm vdo: use a proper Makefile for dm-vdo
2024-02-20 13:43:17 -05:00
md-autodetect.c
md: Remove deprecated CONFIG_MD_LINEAR
2023-12-19 10:16:51 -08:00
md-bitmap.c
md/md-bitmap: fix writing non bitmap pages
2024-06-11 21:22:21 +00:00
md-bitmap.h
md-bitmap: don't use ->index for pages backing the bitmap file
2023-07-27 00:13:29 -07:00
md-cluster.c
md-cluster: check for timeout while a new disk adding
2023-10-12 09:16:19 -07:00
md-cluster.h
…
md.c
Merge branch 'for-6.11/block-limits' into for-6.11/block
2024-06-19 08:14:49 -06:00
md.h
Merge branch 'for-6.11/block-limits' into for-6.11/block
2024-06-14 10:22:08 -06:00
raid0.c
block: move integrity information into queue_limits
2024-06-14 10:20:07 -06:00
raid0.h
md/raid0: add discard support for the 'original' layout
2023-06-30 15:43:50 -07:00
raid1-10.c
md/raid1-10: factor out a new helper raid1_should_read_first()
2024-02-29 22:49:46 -08:00
raid1.c
Merge branch 'for-6.11/block-limits' into for-6.11/block
2024-06-14 10:22:08 -06:00
raid1.h
md/raid1: record nonrot rdevs while adding/removing rdevs to conf
2024-02-29 22:49:45 -08:00
raid5-cache.c
md/raid5: remove rcu protection to access rdev from conf
2023-11-27 15:49:05 -08:00
raid5-log.h
md/raid5-ppl: Drop unused argument from ppl_handle_flush_request()
2022-08-02 17:14:31 -06:00
raid5-ppl.c
md: remove mddev->queue
2024-03-06 08:59:53 -08:00
raid5.c
Merge branch 'for-6.11/block-limits' into for-6.11/block
2024-06-20 06:55:20 -06:00
raid5.h
md/raid5: remove rcu protection to access rdev from conf
2023-11-27 15:49:05 -08:00
raid10.c
Merge branch 'for-6.11/block-limits' into for-6.11/block
2024-06-14 10:22:08 -06:00
raid10.h
md/raid10: switch to use md_account_bio() for io accounting
2023-07-27 00:13:29 -07:00