Ming Lei dc6364b517 dm rq: do not update rq partially in each ending bio ... We don't need to update the original dm request partially when ending each cloned bio: just update original dm request once when the whole cloned request is finished. This still allows full support for partial completion because a new 'completed' counter accounts for incremental progress as the clone bios complete. Partial request update can be a bit expensive, so we should try to avoid it, especially because it is run in softirq context. Avoiding all the partial request updates fixes both hard lockup and soft lockups that were easily reproduced while running Laurence's test[1] on IB/SRP. BTW, after d4acf3650c ("block: Make blk_mq_delay_kick_requeue_list() rerun the queue at a quiet time"), we need to make the test more aggressive for reproducing the lockup: 1) run hammer_write.sh 32 or 64 concurrently. 2) write 8M each time [1] https://marc.info/?l=linux-block&m=150220185510245&w=2 Signed-off-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>		2017-08-28 10:23:28 -04:00
..
bcache	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-07-03 13:08:04 -07:00
persistent-data	dm space map disk: fix some book keeping in the disk space map	2017-05-15 15:09:50 -04:00
bitmap.c	md/bitmap: don't read page from device with Bitmap_sync	2017-07-10 10:30:41 -07:00
bitmap.h	md: move bitmap_destroy to the beginning of __md_stop	2017-03-16 16:55:58 -07:00
dm-bio-prison-v1.c	dm bio prison: use rb_entry() rather than container_of()	2017-06-19 11:03:50 -04:00
dm-bio-prison-v1.h	block: switch bios to blk_status_t	2017-06-09 09:27:32 -06:00
dm-bio-prison-v2.c	dm bio prison: use rb_entry() rather than container_of()	2017-06-19 11:03:50 -04:00
dm-bio-prison-v2.h	dm bio prison v2: new interface for the bio prison	2017-03-07 11:30:16 -05:00
dm-bio-record.h	dm: Refactor for new bio cloning/splitting	2013-11-23 22:33:55 -08:00
dm-bufio.c	dm bufio: fix error code in dm_bufio_write_dirty_buffers()	2017-07-25 10:11:15 -04:00
dm-bufio.h	dm bufio: add sector start offset to dm-bufio interface	2017-03-07 13:28:33 -05:00
dm-builtin.c	dm: move request-based code out to dm-rq.[hc]	2016-06-10 15:15:44 -04:00
dm-cache-background-tracker.c	dm cache: handle kmalloc failure allocating background_tracker struct	2017-05-17 09:44:53 -04:00
dm-cache-background-tracker.h	dm cache: significant rework to leverage dm-bio-prison-v2	2017-03-07 13:28:31 -05:00
dm-cache-block-types.h	linux: drop __bitwise__ everywhere	2016-12-16 00:13:41 +02:00
dm-cache-metadata.c	dm cache metadata: fail operations if fail_io mode has been established	2017-05-05 14:40:13 -04:00
dm-cache-metadata.h	dm cache: significant rework to leverage dm-bio-prison-v2	2017-03-07 13:28:31 -05:00
dm-cache-policy-internal.h	dm cache: significant rework to leverage dm-bio-prison-v2	2017-03-07 13:28:31 -05:00
dm-cache-policy-smq.c	dm cache policy smq: don't do any writebacks unless IDLE	2017-05-14 21:54:33 -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: significant rework to leverage dm-bio-prison-v2	2017-03-07 13:28:31 -05:00
dm-cache-target.c	block: switch bios to blk_status_t	2017-06-09 09:27:32 -06:00
dm-core.h	dm: add basic support for using the select or poll function	2017-06-19 11:03:49 -04:00
dm-crypt.c	dm crypt: add big-endian variant of plain64 IV	2017-06-19 11:03:50 -04:00
dm-delay.c	dm: mark targets that pass integrity data	2017-04-24 12:04:32 -04:00
dm-era-target.c	dm block manager: remove an unused argument from dm_block_manager_create()	2017-04-27 17:08:41 -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 flakey: add support for zoned block devices	2017-06-19 11:03:51 -04:00
dm-integrity.c	dm integrity: test for corrupted disk format during table load	2017-07-25 10:11:14 -04:00
dm-io.c	Merge branch 'for-4.13/block' of git://git.kernel.dk/linux-block	2017-07-03 10:34:51 -07:00
dm-ioctl.c	dm ioctl: report event number in DM_LIST_DEVICES	2017-06-19 11:03:50 -04:00
dm-kcopyd.c	dm kcopyd: add sequential write feature	2017-06-19 11:03:51 -04:00
dm-linear.c	libnvdimm for 4.13	2017-07-07 09:44:06 -07:00
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	block: switch bios to blk_status_t	2017-06-09 09:27:32 -06:00
dm-log.c	block,fs: use REQ_* flags directly	2016-11-01 09:43:26 -06:00
dm-mpath.c	dm mpath: complain about unsupported __multipath_map_bio() return values	2017-08-28 09:58:29 -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-raid.c	dm raid: bump target version	2017-07-25 14:54:20 -04:00
dm-raid1.c	Merge branch 'for-4.13/block' of git://git.kernel.dk/linux-block	2017-07-03 10:34:51 -07:00
dm-region-hash.c	block: rename bio bi_rw to bi_opf	2016-08-07 14:41:02 -06:00
dm-round-robin.c	dm round robin: revert "use percpu 'repeat_count' and 'current_path'"	2017-02-17 00:54:09 -05:00
dm-rq.c	dm rq: do not update rq partially in each ending bio	2017-08-28 10:23:28 -04:00
dm-rq.h	dm rq: do not update rq partially in each ending bio	2017-08-28 10:23:28 -04:00
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: make flush bios explicitly sync	2017-05-31 10:50:23 -04:00
dm-snap-transient.c	dm snapshot: fix hung bios when copy error occurs	2016-01-08 20:03:05 -05:00
dm-snap.c	block: switch bios to blk_status_t	2017-06-09 09:27:32 -06:00
dm-stats.c	mm: introduce kv[mz]alloc helpers	2017-05-08 17:15:12 -07:00
dm-stats.h	dm stats: support precise timestamps	2015-06-17 12:40:40 -04:00
dm-stripe.c	libnvdimm for 4.13	2017-07-07 09:44:06 -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: move request-based code out to dm-rq.[hc]	2016-06-10 15:15:44 -04:00
dm-table.c	dm, dax: Make sure dm_dax_flush() is called if device supports it	2017-07-26 15:55:44 -04:00
dm-target.c	dm: don't return errnos from ->map	2017-06-09 09:27:32 -06:00
dm-thin-metadata.c	dm thin metadata: call precommit before saving the roots	2017-05-15 15:09:49 -04:00
dm-thin-metadata.h	dm thin: fix a race condition between discarding and provisioning a block	2016-07-20 12:43:35 -04:00
dm-thin.c	Merge branch 'for-4.13/block' of git://git.kernel.dk/linux-block	2017-07-03 10:34:51 -07:00
dm-uevent.c
dm-uevent.h
dm-verity-fec.c	dm verity fec: fix GFP flags used with mempool_alloc()	2017-07-26 15:55:44 -04:00
dm-verity-fec.h	dm verity fec: limit error correction recursion	2017-03-16 09:37:31 -04:00
dm-verity-target.c	Linux 4.12-rc5	2017-06-12 08:30:13 -06:00
dm-verity.h	dm verity: switch to using asynchronous hash crypto API	2017-04-24 15:37:04 -04:00
dm-zero.c	dm: don't return errnos from ->map	2017-06-09 09:27:32 -06:00
dm-zoned-metadata.c	dm zoned: use GFP_NOIO in I/O path	2017-07-26 15:55:43 -04:00
dm-zoned-reclaim.c	dm zoned: use GFP_NOIO in I/O path	2017-07-26 15:55:43 -04:00
dm-zoned-target.c	dm zoned: use GFP_NOIO in I/O path	2017-07-26 15:55:43 -04:00
dm-zoned.h	dm zoned: drive-managed zoned block device target	2017-06-19 11:05:20 -04:00
dm.c	dm: fix printk() rate limiting code	2017-08-28 09:58:27 -04:00
dm.h	dm: introduce enum dm_queue_mode to cleanup related code	2017-04-27 17:08:44 -04:00
faulty.c	md: fix deadlock between mddev_suspend() and md_write_start()	2017-06-13 10:18:01 -07:00
Kconfig	dm zoned: drive-managed zoned block device target	2017-06-19 11:05:20 -04:00
linear.c	md: fix deadlock between mddev_suspend() and md_write_start()	2017-06-13 10:18:01 -07:00
linear.h	md linear: fix a race between linear_add() and linear_congested()	2017-02-13 09:17:50 -08:00
Makefile	dm zoned: drive-managed zoned block device target	2017-06-19 11:05:20 -04:00
md-cluster.c	md-cluster: fix potential lock issue in add_new_disk	2017-05-21 20:37:09 -07:00
md-cluster.h	md-cluster: add the support for resize	2017-03-16 16:55:50 -07:00
md.c	MD: not clear ->safemode for external metadata array	2017-08-11 20:42:06 -07:00
md.h	md: raid1-10: move raid1/raid10 common code into raid1-10.c	2017-07-21 12:47:20 -07:00
multipath.c	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md	2017-07-08 12:50:18 -07:00
multipath.h
raid0.c	md: fix deadlock between mddev_suspend() and md_write_start()	2017-06-13 10:18:01 -07:00
raid0.h	block: kill merge_bvec_fn() completely	2015-08-13 12:31:57 -06:00
raid1-10.c	md: raid1-10: move raid1/raid10 common code into raid1-10.c	2017-07-21 12:47:20 -07:00
raid1.c	md: simplify code with bio_io_error	2017-07-21 13:16:52 -07:00
raid1.h	md/raid1: Use a new variable to count flighting sync requests	2017-04-27 14:01:16 -07:00
raid5-cache.c	md/r5cache: fix io_unit handling in r5l_log_endio()	2017-08-08 07:42:37 -07:00
raid5-log.h	md/r5cache: gracefully handle journal device errors for writeback mode	2017-05-11 22:11:11 -07:00
raid5-ppl.c	raid5-ppl: use BIOSET_NEED_BVECS when creating bioset	2017-07-12 09:26:37 -07:00
raid5.c	md/raid5: add thread_group worker async_tx_issue_pending_all	2017-07-24 07:49:15 -07:00
raid5.h	- A major update for DM cache that reduces the latency for deciding	2017-05-03 10:31:20 -07:00
raid10.c	md: simplify code with bio_io_error	2017-07-21 13:16:52 -07:00
raid10.h	md/raid10: simplify the splitting of requests.	2017-04-11 10:13:02 -07:00