Mikulas Patocka dcd195071f dm writecache: improve performance of large linear writes on SSDs ... When dm-writecache is used with SSD as a cache device, it would submit a separate bio for each written block. The I/Os would be merged by the disk scheduler, but this merging degrades performance. Improve dm-writecache performance by submitting larger bios - this is possible as long as there is consecutive free space on the cache device. Benchmark (arm64 with 64k page size, using /dev/ram0 as a cache device): fio --bs=512k --iodepth=32 --size=400M --direct=1 \ --filename=/dev/mapper/cache --rw=randwrite --numjobs=1 --name=test block old new size MiB/s MiB/s --------------------- 512 181 700 1k 347 1256 2k 644 2020 4k 1183 2759 8k 1852 3333 16k 2469 3509 32k 2974 3670 64k 3404 3810 Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>		2020-01-16 13:34:17 -05:00
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bcache	Revert "bcache: fix fifo index swapping condition in journal_pin_cmp()"	2019-11-18 08:35:47 -07:00
persistent-data	dm space map common: fix to ensure new block isn't already in use	2020-01-14 20:15:53 -05:00
dm-bio-prison-v1.c	dm bio prison: replace spin_lock_irqsave with spin_lock_irq	2019-11-05 14:53:03 -05:00
dm-bio-prison-v1.h
dm-bio-prison-v2.c	dm bio prison v2: use true/false for bool variable	2020-01-07 12:07:08 -05:00
dm-bio-prison-v2.h
dm-bio-record.h
dm-bufio.c	dm bufio: introduce a global cache replacement	2019-09-13 17:00:21 -04:00
dm-builtin.c
dm-cache-background-tracker.c	dm cache background tracker: fix sparse warning	2018-04-30 15:40:40 -04:00
dm-cache-background-tracker.h
dm-cache-block-types.h
dm-cache-metadata.c	dm cache metadata: Fix loading discard bitset	2019-04-18 16:18:25 -04:00
dm-cache-metadata.h
dm-cache-policy-internal.h
dm-cache-policy-smq.c	dm: remove unnecessary unlikely() around WARN_ON_ONCE()	2018-10-16 14:34:59 -04:00
dm-cache-policy.c
dm-cache-policy.h
dm-cache-target.c	dm cache: replace spin_lock_irqsave with spin_lock_irq	2019-11-05 14:53:04 -05:00
dm-clone-metadata.c	dm clone metadata: Use a two phase commit	2019-12-05 15:27:54 -05:00
dm-clone-metadata.h	dm clone metadata: Use a two phase commit	2019-12-05 15:27:54 -05:00
dm-clone-target.c	dm clone: Flush destination device before committing metadata	2019-12-05 17:05:23 -05:00
dm-core.h	dm: disable DISCARD if the underlying storage no longer supports it	2019-04-04 15:33:59 -04:00
dm-crypt.c	dm crypt: fix benbi IV constructor crash if used in authenticated mode	2020-01-14 20:22:47 -05:00
dm-delay.c	dm delay: fix a crash when invalid device is specified	2019-04-26 11:29:32 -04:00
dm-dust.c	dm dust: change ret to r in dust_map_write	2020-01-07 11:43:36 -05:00
dm-era-target.c	treewide: Add SPDX license identifier for more missed files	2019-05-21 10:50:45 +02:00
dm-exception-store.c
dm-exception-store.h	- Improve DM snapshot target's scalability by using finer grained	2019-05-16 15:55:48 -07:00
dm-flakey.c	block: rework zone reporting	2019-11-12 19:12:07 -07:00
dm-init.c	docs: device-mapper: move it to the admin-guide	2019-07-15 11:03:01 -03:00
dm-integrity.c	dm integrity: fix excessive alignment of metadata runs	2019-11-15 14:49:16 -05:00
dm-io.c	dm: Use kzalloc for all structs with embedded biosets/mempools	2018-06-05 08:47:43 -06:00
dm-ioctl.c	dm: introduce DM_GET_TARGET_VERSION	2019-09-16 10:18:01 -04:00
dm-kcopyd.c	dm kcopyd: always complete failed jobs	2019-08-15 15:57:39 -04:00
dm-linear.c	block: rework zone reporting	2019-11-12 19:12:07 -07:00
dm-log-userspace-base.c	dm: convert to bioset_init()/mempool_init()	2018-05-30 15:33:32 -06:00
dm-log-userspace-transfer.c
dm-log-userspace-transfer.h
dm-log-writes.c	dm log writes: fix incorrect comment about the logged sequence example	2019-07-09 14:13:33 -04:00
dm-log.c
dm-mpath.c	dm mpath: Add timeout mechanism for queue_if_no_path	2020-01-14 20:23:14 -05:00
dm-mpath.h
dm-path-selector.c
dm-path-selector.h
dm-queue-length.c
dm-raid1.c	dm raid1: use struct_size() with kzalloc()	2019-08-26 11:05:32 -04:00
dm-raid.c	dm raid: table line rebuild status fixes	2020-01-07 11:43:37 -05:00
dm-region-hash.c	- Error path bug fix for overflow tests (Dan)	2018-06-12 18:28:00 -07:00
dm-round-robin.c
dm-rq.c	block: Delay default elevator initialization	2019-09-05 19:52:34 -06:00
dm-rq.h	dm: remove unused _rq_tio_cache and _rq_cache	2019-03-05 14:48:50 -05:00
dm-service-time.c
dm-snap-persistent.c	dm bufio: move dm-bufio.h to include/linux/	2018-04-03 15:04:23 -04:00
dm-snap-transient.c
dm-snap.c	dm snapshot: use true/false for bool variable	2020-01-07 12:07:17 -05:00
dm-stats.c	dm stats: use struct_size() helper	2019-09-04 09:39:22 -04:00
dm-stats.h
dm-stripe.c	dm stripe: use struct_size() in kmalloc()	2019-11-05 14:09:59 -05:00
dm-switch.c	dm switch: use struct_size() in kzalloc()	2019-03-05 14:48:51 -05:00
dm-sysfs.c	dm: remove legacy request-based IO path	2018-10-11 11:36:09 -04:00
dm-table.c	block: don't handle bio based drivers in blk_revalidate_disk_zones	2019-12-03 08:51:25 -07:00
dm-target.c	dm mpath: fix missing call of path selector type->end_io	2019-04-25 15:38:52 -04:00
dm-thin-metadata.c	dm thin metadata: use pool locking at end of dm_pool_metadata_close	2020-01-14 20:22:49 -05:00
dm-thin-metadata.h	dm thin metadata: Add support for a pre-commit callback	2019-12-05 17:05:24 -05:00
dm-thin.c	dm thin: change data device's flush_bio to be member of struct pool	2020-01-14 20:23:13 -05:00
dm-uevent.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156	2019-05-30 11:26:35 -07:00
dm-uevent.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156	2019-05-30 11:26:35 -07:00
dm-unstripe.c	dm: Check for device sector overflow if CONFIG_LBDAF is not set	2018-12-18 09:02:26 -05:00
dm-verity-fec.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
dm-verity-fec.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
dm-verity-target.c	dm verity: don't prefetch hash blocks for already-verified data	2020-01-07 12:07:33 -05:00
dm-verity-verify-sig.c	dm verity: add root hash pkcs#7 signature verification	2019-08-23 10:13:14 -04:00
dm-verity-verify-sig.h	dm verity: add root hash pkcs#7 signature verification	2019-08-23 10:13:14 -04:00
dm-verity.h	dm verity: add root hash pkcs#7 signature verification	2019-08-23 10:13:14 -04:00
dm-writecache.c	dm writecache: improve performance of large linear writes on SSDs	2020-01-16 13:34:17 -05:00
dm-zero.c
dm-zoned-metadata.c	dm zoned: support zone sizes smaller than 128MiB	2020-01-07 11:43:38 -05:00
dm-zoned-reclaim.c	dm zoned: reduce overhead of backing device checks	2019-11-07 10:08:36 -05:00
dm-zoned-target.c	block: simplify blkdev_nr_zones	2019-12-03 08:51:24 -07:00
dm-zoned.h	dm zoned: reduce overhead of backing device checks	2019-11-07 10:08:36 -05:00
dm.c	block: rework zone reporting	2019-11-12 19:12:07 -07:00
dm.h	dm: make dm_table_find_target return NULL	2019-08-23 10:13:12 -04:00
Kconfig	dm: Fix Kconfig indentation	2019-11-20 10:35:31 -05:00
Makefile	dm: add clone target	2019-09-12 09:32:31 -04:00
md-bitmap.c	md/bitmap: avoid race window between md_bitmap_resize and bitmap_file_clear_bit	2019-10-24 15:22:40 -07:00
md-bitmap.h	md: Avoid namespace collision with bitmap API	2018-08-01 15:49:39 -07:00
md-cluster.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 45	2019-05-24 17:27:12 +02:00
md-cluster.h	md-cluster: introduce resync_info_get interface for sanity check	2018-10-18 09:36:35 -07:00
md-faulty.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 47	2019-05-24 17:27:13 +02:00
md-linear.c	md: improve handling of bio with REQ_PREFLUSH in md_flush_request()	2019-10-24 15:22:40 -07:00
md-linear.h
md-multipath.c	md: improve handling of bio with REQ_PREFLUSH in md_flush_request()	2019-10-24 15:22:40 -07:00
md-multipath.h	md: convert to bioset_init()/mempool_init()	2018-05-30 15:33:32 -06:00
md.c	md: make sure desc_nr less than MD_SB_DISKS	2019-12-11 10:38:08 -08:00
md.h	md: improve handling of bio with REQ_PREFLUSH in md_flush_request()	2019-10-24 15:22:40 -07:00
raid0.c	for-5.5/drivers-20191121	2019-11-25 11:15:41 -08:00
raid0.h	md/raid0: avoid RAID0 data corruption due to layout confusion.	2019-09-13 13:10:05 -07:00
raid1-10.c	md: raid1-10: Unify r{1,10}bio_pool_free	2019-06-15 01:37:35 -06:00
raid1.c	md: raid1: check rdev before reference in raid1_sync_request func	2019-12-11 10:36:13 -08:00
raid1.h	md: convert to bioset_init()/mempool_init()	2018-05-30 15:33:32 -06:00
raid5-cache.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288	2019-06-05 17:36:37 +02:00
raid5-log.h	raid5: set write hint for PPL	2019-03-12 10:15:18 -07:00
raid5-ppl.c	treewide: Use sizeof_field() macro	2019-12-09 10:36:44 -08:00
raid5.c	raid5: need to set STRIPE_HANDLE for batch head	2019-12-11 10:12:09 -08:00
raid5.h	raid5: use bio_end_sector in r5_next_bio	2019-09-13 13:14:43 -07:00
raid10.c	md/raid10: prevent access of uninitialized resync_pages offset	2019-11-11 16:47:39 -08:00
raid10.h	md: convert to bioset_init()/mempool_init()	2018-05-30 15:33:32 -06:00