Shaohua Li f3b51a03be MD: make bio mergeable ...

commit 9c573de328 upstream.

blk_queue_split marks bio unmergeable, which makes sense for normal bio.
But if dispatching the bio to underlayer disk, the blk_queue_split
checks are invalid, hence it's possible the bio becomes mergeable.

In the reported bug, this bug causes trim against raid0 performance slash
https://bugzilla.kernel.org/show_bug.cgi?id=117051

Reported-and-tested-by: Park Ju Hyung <qkrwngud825@gmail.com>
Fixes: 6ac45aeb6bca(block: avoid to merge splitted bio)
Cc: Ming Lei <ming.lei@canonical.com>
Cc: Neil Brown <neilb@suse.de>
Reviewed-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2016-05-11 11:21:13 +02:00

..

bcache

bcache: fix cache_set_flush() NULL pointer dereference on OOM

2016-04-12 09:08:53 -07:00

persistent-data

dm space map metadata: remove unused variable in brb_pop()

2016-03-03 15:07:14 -08:00

bitmap.c

md-cluster: Use a small window for resync

2015-10-12 01:32:05 -05:00

bitmap.h

md-cluster: Use a small window for resync

2015-10-12 01:32:05 -05:00

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: Refactor for new bio cloning/splitting

2013-11-23 22:33:55 -08:00

dm-bufio.c

dm: convert ffs to __ffs

2015-10-31 19:06:01 -04:00

dm-bufio.h

dm snapshot: use dm-bufio prefetch

2014-01-14 23:23:03 -05:00

dm-builtin.c

dm sysfs: fix a module unload race

2014-01-14 23:23:04 -05:00

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

2016-05-04 14:48:41 -07:00

dm-cache-metadata.h

dm cache: make sure every metadata function checks fail_io

2016-04-12 09:08:40 -07:00

dm-cache-policy-cleaner.c

Merge tag 'dm-4.4-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm

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-mq.c

dm: convert ffs to __ffs

2015-10-31 19:06:01 -04:00

dm-cache-policy-smq.c

dm: convert ffs to __ffs

2015-10-31 19:06:01 -04:00

dm-cache-policy.c

dm cache: add policy name to status output

2014-01-16 13:44:11 -05:00

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: make sure every metadata function checks fail_io

2016-04-12 09:08:40 -07:00

dm-crypt.c

dm crypt: fix a possible hang due to race condition on exit

2015-11-19 13:38:30 -05:00

dm-delay.c

dm delay: document that offsets are specified in sectors

2015-10-31 19:06:05 -04:00

dm-era-target.c

dm persistent data: eliminate unnecessary return values

2015-10-31 19:06:02 -04:00

dm-exception-store.c

Merge tag 'dm-4.4-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm

2015-11-04 21:19:53 -08:00

dm-exception-store.h

dm snapshot: fix hung bios when copy error occurs

2016-03-03 15:07:14 -08:00

dm-flakey.c

dm: refactor ioctl handling

2015-10-31 19:05:59 -04:00

dm-io.c

dm: drop NULL test before kmem_cache_destroy() and mempool_destroy()

2015-10-31 19:06:00 -04:00

dm-ioctl.c

char: make misc_deregister a void function

2015-08-05 10:35:49 -07:00

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: refactor ioctl handling

2015-10-31 19:05:59 -04:00

dm-log.c

…

dm-mpath.c

dm mpath: fix infinite recursion in ioctl when no paths and !queue_if_no_path

2015-11-17 14:19:00 -05:00

dm-mpath.h

…

dm-path-selector.c

…

dm-path-selector.h

…

dm-queue-length.c

…

dm-raid1.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-raid.c

dm raid: fix round up of default region size

2015-10-02 12:02:31 -04:00

dm-region-hash.c

dm: convert ffs to __ffs

2015-10-31 19:06:01 -04:00

dm-round-robin.c

…

dm-service-time.c

…

dm-snap-persistent.c

dm snapshot: fix hung bios when copy error occurs

2016-03-03 15:07:14 -08:00

dm-snap-transient.c

dm snapshot: fix hung bios when copy error occurs

2016-03-03 15:07:14 -08:00

dm-snap.c

dm snapshot: disallow the COW and origin devices from being identical

2016-04-12 09:08:39 -07:00

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

dm snapshot: disallow the COW and origin devices from being identical

2016-04-12 09:08:39 -07:00

dm-target.c

dm: allocate requests in target when stacking on blk-mq devices

2015-02-09 13:06:47 -05:00

dm-thin-metadata.c

dm thin metadata: don't issue prefetches if a transaction abort has failed

2016-04-12 09:08:40 -07:00

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: fix race condition when destroying thin pool workqueue

2016-03-03 15:07:10 -08:00

dm-uevent.c

…

dm-uevent.h

…

dm-verity.c

dm: refactor ioctl handling

2015-10-31 19:05:59 -04:00

dm-zero.c

block: add a bi_error field to struct bio

2015-07-29 08:55:15 -06:00

dm.c

dm: fix rq_end_stats() NULL pointer in dm_requeue_original_request()

2016-04-12 09:08:40 -07:00

dm.h

block: kill merge_bvec_fn() completely

2015-08-13 12:31:57 -06:00

faulty.c

block: add a bi_error field to struct bio

2015-07-29 08:55:15 -06:00

Kconfig

raid5-cache: add crc32c Kconfig dependency

2015-11-09 09:09:52 +11:00

linear.c

block: kill merge_bvec_fn() completely

2015-08-13 12:31:57 -06:00

linear.h

…

Makefile

raid5: add basic stripe log

2015-10-24 17:16:19 +11:00

md-cluster.c

md-cluster: remove mddev arg from add_resync_info()

2015-10-24 17:16:18 +11:00

md-cluster.h

md-cluster: Fix adding of new disk with new reload code

2015-10-12 03:35:30 -05:00

md.c

MD: make bio mergeable

2016-05-11 11:21:13 +02:00

md.h

md/raid: only permit hot-add of compatible integrity profiles

2016-02-17 12:30:57 -08:00

multipath.c

md: multipath: don't hardcopy bio in .make_request path

2016-04-12 09:08:57 -07:00

multipath.h

…

raid0.c

md/raid0: apply base queue limits *before* disk_stack_limits

2015-10-02 17:23:44 +10:00

raid0.h

block: kill merge_bvec_fn() completely

2015-08-13 12:31:57 -06:00

raid1.c

raid1: include bio_end_io_list in nr_queued to prevent freeze_array hang

2016-04-12 09:08:56 -07:00

raid1.h

md-cluster: Use a small window for resync

2015-10-12 01:32:05 -05:00

raid5-cache.c

raid5-cache: start raid5 readonly if journal is missing

2015-11-01 13:48:29 +11:00

raid5.c

md/raid5: preserve STRIPE_PREREAD_ACTIVE in break_stripe_batch_list

2016-04-12 09:08:57 -07:00

raid5.h

RAID5: revert e9e4c377e2 to fix a livelock

2016-04-12 09:08:57 -07:00

raid10.c

raid10: include bio_end_io_list in nr_queued to prevent freeze_array hang

2016-04-12 09:08:57 -07:00

raid10.h

md/raid10: ensure device failure recorded before write request returns.

2015-08-31 19:43:45 +02:00