Tomasz Majchrzak 7ac5044722 raid1/raid10: slow down resync if there is non-resync activity pending ... A performance drop of mkfs has been observed on RAID10 during resync since commit 09314799e4 ("md: remove 'go_faster' option from ->sync_request()"). Resync sends so many IOs it slows down non-resync IOs significantly (few times). Add a short delay to a resync. The previous long sleep (1s) has proven unnecessary, even very short delay brings performance right. The change also applied to raid1. The problem has not been observed on raid1, however it shares barriers code with raid10 so it might be an issue for some setup too. Suggested-by: NeilBrown <neilb@suse.com> Link: http://lkml.kernel.org/r/20160609134555.GA9104@proton.igk.intel.com Signed-off-by: Tomasz Majchrzak <tomasz.majchrzak@intel.com> Signed-off-by: Shaohua Li <shli@fb.com>		2016-06-13 11:54:11 -07:00
..
bcache	bcache: switch to using blk_queue_write_cache()	2016-04-12 16:00:39 -06:00
persistent-data	dm space map metadata: remove unused variable in brb_pop()	2015-12-14 09:26:01 -05:00
bitmap.c	md-cluster: gather resync infos and enable recv_thread after bitmap is ready	2016-05-09 09:24:03 -07:00
bitmap.h	md-cluster: sync bitmap when node received RESYNCING msg	2016-05-04 12:39:35 -07:00
dm-bio-prison.c	block: add a bi_error field to struct bio	2015-07-29 08:55:15 -06:00
dm-bio-prison.h	dm bio prison: add dm_cell_promote_or_release()	2015-05-29 14:19:06 -04:00
dm-bio-record.h
dm-bufio.c	Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2016-01-12 17:11:47 -08:00
dm-bufio.h
dm-builtin.c
dm-cache-block-types.h	dm cache: revert "remove remainder of distinct discard block size"	2014-11-10 15:25:30 -05:00
dm-cache-metadata.c	dm cache metadata: fix cmd_read_lock() acquiring write lock	2016-04-17 11:24:46 -04:00
dm-cache-metadata.h	dm cache: make sure every metadata function checks fail_io	2016-03-10 17:12:12 -05:00
dm-cache-policy-cleaner.c	- Revert a dm-multipath change that caused a regression for unprivledged	2015-11-04 21:19:53 -08:00
dm-cache-policy-internal.h	dm cache: age and write back cache entries even without active IO	2015-06-11 17:13:01 -04:00
dm-cache-policy-smq.c	dm cache policy smq: clarify that mq registration failure was for 'mq'	2016-03-10 17:12:11 -05:00
dm-cache-policy.c
dm-cache-policy.h	dm cache: age and write back cache entries even without active IO	2015-06-11 17:13:01 -04:00
dm-cache-target.c	dm cache: bump the target version	2016-03-10 17:12:12 -05:00
dm-crypt.c	Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2016-03-17 11:22:54 -07:00
dm-delay.c	dm: rename target's per_bio_data_size to per_io_data_size	2016-02-22 22:34:37 -05:00
dm-era-target.c	dm persistent data: eliminate unnecessary return values	2015-10-31 19:06:02 -04:00
dm-exception-store.c	- Revert a dm-multipath change that caused a regression for unprivledged	2015-11-04 21:19:53 -08:00
dm-exception-store.h	dm snapshot: fix hung bios when copy error occurs	2016-01-08 20:03:05 -05:00
dm-flakey.c	dm: rename target's per_bio_data_size to per_io_data_size	2016-02-22 22:34:37 -05:00
dm-io.c	md: more open-coded offset_in_page()	2016-01-04 10:29:12 -05:00
dm-ioctl.c	dm ioctl: drop use of __GFP_REPEAT in copy_params()'s __vmalloc() call	2016-05-05 15:25:55 -04:00
dm-kcopyd.c	mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd	2015-11-06 17:50:42 -08:00
dm-linear.c	dm linear: remove redundant target name from error messages	2015-10-31 19:06:03 -04:00
dm-log-userspace-base.c	dm: drop NULL test before kmem_cache_destroy() and mempool_destroy()	2015-10-31 19:06:00 -04:00
dm-log-userspace-transfer.c	dm log userspace transfer: match wait_for_completion_timeout return type	2015-04-15 12:10:20 -04:00
dm-log-userspace-transfer.h
dm-log-writes.c	dm: rename target's per_bio_data_size to per_io_data_size	2016-02-22 22:34:37 -05:00
dm-log.c
dm-mpath.c	dm mpath: eliminate use of spinlock in IO fast-paths	2016-05-05 15:25:52 -04:00
dm-mpath.h
dm-path-selector.c
dm-path-selector.h	dm path selector: remove 'repeat_count' return from .select_path hook	2016-02-22 22:34:42 -05:00
dm-queue-length.c	dm path selector: remove 'repeat_count' return from .select_path hook	2016-02-22 22:34:42 -05:00
dm-raid1.c	dm: rename target's per_bio_data_size to per_io_data_size	2016-02-22 22:34:37 -05:00
dm-raid.c	dm raid: make sure no feature flags are set in metadata	2016-05-13 09:03:51 -04:00
dm-region-hash.c	dm: convert ffs to __ffs	2015-10-31 19:06:01 -04:00
dm-round-robin.c	dm round robin: use percpu 'repeat_count' and 'current_path'	2016-02-22 22:34:42 -05:00
dm-service-time.c	dm path selector: remove 'repeat_count' return from .select_path hook	2016-02-22 22:34:42 -05:00
dm-snap-persistent.c	dm snapshot: fix hung bios when copy error occurs	2016-01-08 20:03:05 -05:00
dm-snap-transient.c	dm snapshot: fix hung bios when copy error occurs	2016-01-08 20:03:05 -05:00
dm-snap.c	dm snapshot: disallow the COW and origin devices from being identical	2016-03-10 17:12:09 -05:00
dm-stats.c	dm stats: report precise_timestamps and histogram in @stats_list output	2015-08-18 17:20:03 -04:00
dm-stats.h	dm stats: support precise timestamps	2015-06-17 12:40:40 -04:00
dm-stripe.c	Merge tag 'dm-4.3-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm	2015-09-02 16:35:26 -07:00
dm-switch.c	dm switch: simplify conditional in alloc_region_table()	2015-10-31 19:06:06 -04:00
dm-sysfs.c	dm: add 'use_blk_mq' module param and expose in per-device ro sysfs attr	2015-04-15 12:10:17 -04:00
dm-table.c	block: kill off q->flush_flags	2016-04-13 13:33:19 -06:00
dm-target.c	dm: set DM_TARGET_WILDCARD feature on "error" target	2016-02-22 11:06:21 -05:00
dm-thin-metadata.c	dm thin metadata: don't issue prefetches if a transaction abort has failed	2016-03-10 17:12:09 -05:00
dm-thin-metadata.h	dm thin metadata: add dm_thin_remove_range()	2015-06-11 17:13:04 -04:00
dm-thin.c	dm thin: unroll issue_discard() to create longer discard bio chains	2016-05-13 09:04:20 -04:00
dm-uevent.c
dm-uevent.h
dm-verity-fec.c	dm: rename target's per_bio_data_size to per_io_data_size	2016-02-22 22:34:37 -05:00
dm-verity-fec.h	dm verity: add support for forward error correction	2015-12-10 10:39:03 -05:00
dm-verity-target.c	dm: rename target's per_bio_data_size to per_io_data_size	2016-02-22 22:34:37 -05:00
dm-verity.h	dm verity: add ignore_zero_blocks feature	2015-12-10 10:39:03 -05:00
dm-zero.c	block: add a bi_error field to struct bio	2015-07-29 08:55:15 -06:00
dm.c	dm: remove unused mapped_device argument from free_tio()	2016-05-05 15:25:49 -04:00
dm.h	dm: allow immutable request-based targets to use blk-mq pdu	2016-02-22 22:34:37 -05:00
faulty.c	MD: rename some functions	2016-01-20 13:52:20 -08:00
Kconfig	dm: add missing newline between DM_DEBUG_BLOCK_STACK_TRACING and DM_BUFIO	2016-03-10 17:12:11 -05:00
linear.c	block: kill merge_bvec_fn() completely	2015-08-13 12:31:57 -06:00
linear.h
Makefile	dm cache: make the 'mq' policy an alias for 'smq'	2016-03-10 17:12:08 -05:00
md-cluster.c	md-cluster: check the return value of process_recvd_msg	2016-05-09 09:24:04 -07:00
md-cluster.h	md-cluster: gather resync infos and enable recv_thread after bitmap is ready	2016-05-09 09:24:03 -07:00
md.c	MD:Update superblock when err == 0 in size_store	2016-06-13 11:54:11 -07:00
md.h	md-cluster: fix deadlock issue when add disk to an recoverying array	2016-06-03 16:22:59 -07:00
multipath.c	md: multipath: don't hardcopy bio in .make_request path	2016-03-14 11:32:26 -07:00
multipath.h
raid0.c	md/raid0: remove empty line printk from dump_zones	2016-04-25 08:43:58 -07:00
raid0.h	block: kill merge_bvec_fn() completely	2015-08-13 12:31:57 -06:00
raid1.c	raid1/raid10: slow down resync if there is non-resync activity pending	2016-06-13 11:54:11 -07:00
raid1.h	md-cluster: Use a small window for resync	2015-10-12 01:32:05 -05:00
raid5-cache.c	Merge tag 'md/4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md	2016-05-19 17:25:13 -07:00
raid5.c	right meaning of PARITY_ENABLE_RMW and PARITY_PREFER_RMW	2016-05-25 21:26:07 -07:00
raid5.h	RAID5: revert e9e4c377e2 to fix a livelock	2016-02-26 09:44:56 -08:00
raid10.c	raid1/raid10: slow down resync if there is non-resync activity pending	2016-06-13 11:54:11 -07:00
raid10.h	md/raid10: ensure device failure recorded before write request returns.	2015-08-31 19:43:45 +02:00