Tang Junhui fad9bcb117 bcache: segregate flash only volume write streams ... [ Upstream commit 4eca1cb28d ] In such scenario that there are some flash only volumes , and some cached devices, when many tasks request these devices in writeback mode, the write IOs may fall to the same bucket as bellow: | cached data | flash data | cached data | cached data| flash data| then after writeback of these cached devices, the bucket would be like bellow bucket: | free | flash data | free | free | flash data | So, there are many free space in this bucket, but since data of flash only volumes still exists, so this bucket cannot be reclaimable, which would cause waste of bucket space. In this patch, we segregate flash only volume write streams from cached devices, so data from flash only volumes and cached devices can store in different buckets. Compare to v1 patch, this patch do not add a additionally open bucket list, and it is try best to segregate flash only volume write streams from cached devices, sectors of flash only volumes may still be mixed with dirty sectors of cached device, but the number is very small. [mlyle: fixed commit log formatting, permissions, line endings] Signed-off-by: Tang Junhui <tang.junhui@zte.com.cn> Reviewed-by: Michael Lyle <mlyle@lyle.org> Signed-off-by: Michael Lyle <mlyle@lyle.org> Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-04-12 12:32:18 +02:00
..
bcache	bcache: segregate flash only volume write streams	2018-04-12 12:32:18 +02:00
persistent-data	dm btree: fix serious bug in btree_split_beneath()	2018-01-23 19:58:18 +01:00
Kconfig	dm zoned: drive-managed zoned block device target	2017-06-19 11:05:20 -04:00
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
bitmap.c	md: free unused memory after bitmap resize	2017-12-17 15:08:00 +01:00
bitmap.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
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	dm bufio: avoid false-positive Wmaybe-uninitialized warning	2018-03-15 10:54:33 +01:00
dm-bufio.h	dm integrity: optimize writing dm-bufio buffers that are partially changed	2017-08-28 11:47:17 -04:00
dm-builtin.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
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	dm: fix various targets to dm_register_target after module __init resources created	2017-12-20 10:10:21 +01:00
dm-core.h	dm: allocate struct mapped_device with kvzalloc	2017-11-30 08:40:43 +00:00
dm-crypt.c	dm crypt: fix error return code in crypt_ctr()	2018-01-23 19:58:19 +01:00
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	…
dm-exception-store.h	…
dm-flakey.c	- Some request-based DM core and DM multipath fixes and cleanups	2017-09-14 13:43:16 -07:00
dm-integrity.c	dm integrity: don't store cipher request on the stack	2018-01-23 19:58:19 +01:00
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: fix alignment of event number in the device list	2017-09-25 11:18:29 -04:00
dm-kcopyd.c	dm kcopyd: add sequential write feature	2017-06-19 11:03:51 -04:00
dm-linear.c	- Some request-based DM core and DM multipath fixes and cleanups	2017-09-14 13:43:16 -07:00
dm-log-userspace-base.c	…
dm-log-userspace-transfer.c	…
dm-log-userspace-transfer.h	…
dm-log-writes.c	- Some request-based DM core and DM multipath fixes and cleanups	2017-09-14 13:43:16 -07:00
dm-log.c	block,fs: use REQ_* flags directly	2016-11-01 09:43:26 -06:00
dm-mpath.c	dm mpath: fix passing integrity data	2018-03-19 08:42:47 +01:00
dm-mpath.h	…
dm-path-selector.c	…
dm-path-selector.h	…
dm-queue-length.c	…
dm-raid.c	dm raid: fix raid set size revalidation	2018-03-19 08:42:54 +01:00
dm-raid1.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
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-snap-persistent.c	dm: make flush bios explicitly sync	2017-05-31 10:50:23 -04:00
dm-snap-transient.c	…
dm-snap.c	dm: fix various targets to dm_register_target after module __init resources created	2017-12-20 10:10:21 +01:00
dm-stats.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
dm-stats.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
dm-stripe.c	- Some request-based DM core and DM multipath fixes and cleanups	2017-09-14 13:43:16 -07:00
dm-switch.c	- Some request-based DM core and DM multipath fixes and cleanups	2017-09-14 13:43:16 -07:00
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: discard support requires all targets in a table support discards	2017-11-30 08:40:43 +00:00
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: THIN_MAX_CONCURRENT_LOCKS should be 6	2018-01-23 19:58:18 +01:00
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	dm: fix various targets to dm_register_target after module __init resources created	2017-12-20 10:10:21 +01:00
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	- Some request-based DM core and DM multipath fixes and cleanups	2017-09-14 13:43:16 -07:00
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	dm zoned: ignore last smaller runt zone	2017-11-30 08:40:42 +00:00
dm-zoned.h	dm zoned: drive-managed zoned block device target	2017-06-19 11:05:20 -04:00
dm.c	dm: correctly handle chained bios in dec_pending()	2018-02-22 15:42:29 +01:00
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
linear.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
linear.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
md-cluster.c	md-cluster: fix potential lock issue in add_new_disk	2017-05-21 20:37:09 -07:00
md-cluster.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
md.c	md: only allow remove_and_add_spares when no sync_thread running.	2018-03-08 22:41:26 -08:00
md.h	md: separate request handling	2017-09-27 20:07:40 -07:00
multipath.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
multipath.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
raid0.c	Merge tag 'md/4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md	2017-09-07 12:41:48 -07:00
raid0.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
raid1-10.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
raid1.c	md/raid1/10: add missed blk plug	2018-02-25 11:07:57 +01:00
raid1.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
raid5-cache.c	md/r5cache: move mddev_lock() out of r5c_journal_mode_set()	2017-12-14 09:52:59 +01:00
raid5-log.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
raid5-ppl.c	raid5-ppl: check recovery_offset when performing ppl recovery	2017-12-20 10:10:36 +01:00
raid5.c	md/raid5: correct degraded calculation in raid5_error	2018-02-25 11:07:57 +01:00
raid5.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
raid10.c	md/raid1/10: add missed blk plug	2018-02-25 11:07:57 +01:00
raid10.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00