Tang Junhui 9baf30972b bcache: fix for gc and write-back race ...

gc and write-back get raced (see the email "bcache get stucked" I sended
before):
gc thread                               write-back thread
|                                       |bch_writeback_thread()
|bch_gc_thread()                        |
|                                       |==>read_dirty()
|==>bch_btree_gc()                      |
|==>btree_root() //get btree root       |
|                //node write locker    |
|==>bch_btree_gc_root()                 |
|                                       |==>read_dirty_submit()
|                                       |==>write_dirty()
|                                       |==>continue_at(cl,
|                                       |               write_dirty_finish,
|                                       |               system_wq);
|                                       |==>write_dirty_finish()//excute
|                                       |               //in system_wq
|                                       |==>bch_btree_insert()
|                                       |==>bch_btree_map_leaf_nodes()
|                                       |==>__bch_btree_map_nodes()
|                                       |==>btree_root //try to get btree
|                                       |              //root node read
|                                       |              //lock
|                                       |-----stuck here
|==>bch_btree_set_root()
|==>bch_journal_meta()
|==>bch_journal()
|==>journal_try_write()
|==>journal_write_unlocked() //journal_full(&c->journal)
|                            //condition satisfied
|==>continue_at(cl, journal_write, system_wq); //try to excute
|                               //journal_write in system_wq
|                               //but work queue is excuting
|                               //write_dirty_finish()
|==>closure_sync(); //wait journal_write execute
|                   //over and wake up gc,
|-------------stuck here
|==>release root node write locker

This patch alloc a separate work-queue for write-back thread to avoid such
race.

(Commit log re-organized by Coly Li to pass checkpatch.pl checking)

Signed-off-by: Tang Junhui <tang.junhui@zte.com.cn>
Acked-by: Coly Li <colyli@suse.de>
Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>

2017-09-06 08:17:33 -06:00

..

bcache

bcache: fix for gc and write-back race

2017-09-06 08:17:33 -06:00

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

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

dm-bufio.c

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

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-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: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -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

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

dm-delay.c

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

dm-era-target.c

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

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

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

dm-integrity.c

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

dm-io.c

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

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

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

dm-log-userspace-base.c

…

dm-log-userspace-transfer.c

…

dm-log-userspace-transfer.h

…

dm-log-writes.c

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

dm-log.c

block,fs: use REQ_* flags directly

2016-11-01 09:43:26 -06:00

dm-mpath.c

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

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

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

dm-raid.c

dm raid: bump target version

2017-07-25 14:54:20 -04:00

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

blk-mq: use the introduced blk_mq_unquiesce_queue()

2017-06-18 14:20:04 -06:00

dm-rq.h

block: introduce new block status code type

2017-06-09 09:27:32 -06:00

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: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

dm-stats.c

mm: introduce kv[mz]alloc helpers

2017-05-08 17:15:12 -07:00

dm-stats.h

…

dm-stripe.c

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

dm-switch.c

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

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

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

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

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -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

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

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

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

dm-zoned.h

dm zoned: drive-managed zoned block device target

2017-06-19 11:05:20 -04:00

dm.c

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

dm.h

dm: introduce enum dm_queue_mode to cleanup related code

2017-04-27 17:08:44 -04:00

faulty.c

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

Kconfig

dm zoned: drive-managed zoned block device target

2017-06-19 11:05:20 -04:00

linear.c

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

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

Linux 4.13-rc7

2017-08-28 13:00:44 -06:00

md.h

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

multipath.c

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

multipath.h

…

raid0.c

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

raid0.h

…

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

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

raid1.h

md/raid1: Use a new variable to count flighting sync requests

2017-04-27 14:01:16 -07:00

raid5-cache.c

Linux 4.13-rc7

2017-08-28 13:00:44 -06:00

raid5-log.h

md/r5cache: gracefully handle journal device errors for writeback mode

2017-05-11 22:11:11 -07:00

raid5-ppl.c

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

raid5.c

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

raid5.h

- A major update for DM cache that reduces the latency for deciding

2017-05-03 10:31:20 -07:00

raid10.c

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

raid10.h

md/raid10: simplify the splitting of requests.

2017-04-11 10:13:02 -07:00