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651f5fa2a3
linux/drivers/md
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Joe Thornber 651f5fa2a3 dm cache: defer whole cells 
Currently individual bios are deferred to the worker thread if they
cannot be processed immediately (eg, a block is in the process of
being moved to the fast device).

This patch passes whole cells across to the worker.  This saves
reaquiring the cell, and also collects bios destined for the same block
together, which allows them to be mapped with a single look up to the
policy.  This reduces the overhead of using dm-cache.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2015-05-29 14:19:06 -04:00
..
bcache block: remove management of bi_remaining when restoring original bi_end_io 2015-05-22 08:58:55 -06:00
persistent-data dm thin metadata: remove in-core 'read_only' flag 2015-05-29 14:18:59 -04:00
bitmap.c md/bitmap: remove rcu annotation from pointer arithmetic. 2015-05-21 09:14:41 +10:00
bitmap.h md-cluster: re-add capabilities 2015-04-22 07:59:39 +10:00
dm-bio-prison.c dm bio prison: add dm_cell_promote_or_release() 2015-05-29 14:19:06 -04:00
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 bufio: fix time comparison to use time_after_eq() 2015-02-09 13:06:48 -05:00
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: fix missing ERR_PTR returns and handling 2015-01-28 09:59:20 -05:00
dm-cache-metadata.h dm cache: revert "remove remainder of distinct discard block size" 2014-11-10 15:25:30 -05:00
dm-cache-policy-cleaner.c dm cache: pass a new 'critical' flag to the policies when requesting writeback work 2015-05-29 14:19:04 -04:00
dm-cache-policy-internal.h dm cache: pull out some bitset utility functions for reuse 2015-05-29 14:19:05 -04:00
dm-cache-policy-mq.c dm cache: pass a new 'critical' flag to the policies when requesting writeback work 2015-05-29 14:19:04 -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: pass a new 'critical' flag to the policies when requesting writeback work 2015-05-29 14:19:04 -04:00
dm-cache-target.c dm cache: defer whole cells 2015-05-29 14:19:06 -04:00
dm-crypt.c dm crypt: add comments to better describe crypto processing logic 2015-05-29 14:19:02 -04:00
dm-delay.c dm delay: use msecs_to_jiffies for time conversion 2015-04-15 12:10:21 -04:00
dm-era-target.c dm era: check for a non-NULL metadata object before closing it 2014-06-03 13:44:08 -04:00
dm-exception-store.c dm: replace simple_strtoul 2012-07-27 15:07:59 +01:00
dm-exception-store.h
dm-flakey.c block: Abstract out bvec iterator 2013-11-23 22:33:47 -08:00
dm-io.c dm io: deal with wandering queue limits when handling REQ_DISCARD and REQ_WRITE_SAME 2015-02-27 14:53:32 -05:00
dm-ioctl.c dm: only initialize the request_queue once 2015-04-30 10:25:21 -04:00
dm-kcopyd.c dm: stop using WQ_NON_REENTRANT 2013-08-23 09:02:13 -04:00
dm-linear.c block: Abstract out bvec iterator 2013-11-23 22:33:47 -08:00
dm-log-userspace-base.c dm log userspace base: fix compile warning 2015-04-15 12:10:20 -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 log writes: use ULL suffix for 64-bit constants 2015-05-29 14:19:01 -04:00
dm-log.c dm: use memweight() 2012-07-30 17:25:16 -07:00
dm-mpath.c dm mpath: fix leak of dm_mpath_io structure in blk-mq .queue_rq error path 2015-05-27 17:37:22 -04:00
dm-mpath.h
dm-path-selector.c md: Add module.h to all files using it implicitly 2011-10-31 19:31:18 -04:00
dm-path-selector.h
dm-queue-length.c dm: reject trailing characters in sccanf input 2012-03-28 18:41:26 +01:00
dm-raid.c dm raid: add support for the MD RAID0 personality 2015-05-29 14:19:00 -04:00
dm-raid1.c dm raid1: keep issuing IO after leg failure 2015-05-29 14:19:02 -04:00
dm-region-hash.c block: Abstract out bvec iterator 2013-11-23 22:33:47 -08:00
dm-round-robin.c dm: reject trailing characters in sccanf input 2012-03-28 18:41:26 +01:00
dm-service-time.c dm: reject trailing characters in sccanf input 2012-03-28 18:41:26 +01:00
dm-snap-persistent.c dm snapshot: remove unnecessary NULL checks before vfree() calls 2015-02-09 13:06:49 -05:00
dm-snap-transient.c md: Add in export.h for files using EXPORT_SYMBOL 2011-10-31 19:31:19 -04:00
dm-snap.c block: remove management of bi_remaining when restoring original bi_end_io 2015-05-22 08:58:55 -06:00
dm-stats.c - Significant DM thin-provisioning performance improvements to meet 2014-12-08 21:10:03 -08:00
dm-stats.h dm: add statistics support 2013-09-05 20:46:06 -04:00
dm-stripe.c dm stripe: drop useless exit point from dm_stripe_init() 2015-05-29 14:19:01 -04:00
dm-switch.c dm switch: efficiently support repetitive patterns 2014-08-01 12:30:37 -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: do not allocate any mempools for blk-mq request-based DM 2015-05-29 14:18:57 -04:00
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: remove in-core 'read_only' flag 2015-05-29 14:18:59 -04:00
dm-thin-metadata.h dm thin metadata: remove unused dm_pool_get_data_block_size() 2015-02-09 13:06:49 -05:00
dm-thin.c dm thin: cleanup schedule_zero() to read more logically 2015-05-29 14:18:58 -04:00
dm-uevent.c md: Add in export.h for files using EXPORT_SYMBOL 2011-10-31 19:31:19 -04:00
dm-uevent.h
dm-verity.c block: remove management of bi_remaining when restoring original bi_end_io 2015-05-22 08:58:55 -06:00
dm-zero.c dm crypt, dm zero: update author name following legal name change 2014-07-10 16:44:14 -04:00
dm.c dm: factor out a common cleanup_mapped_device() 2015-05-29 14:18:58 -04:00
dm.h block, dm: don't copy bios for request clones 2015-05-22 08:58:57 -06:00
faulty.c md: rename ->stop to ->free 2015-02-04 08:35:52 +11:00
Kconfig md updates for 4.1 2015-04-24 09:28:01 -07:00
linear.c md: rename ->stop to ->free 2015-02-04 08:35:52 +11:00
linear.h md/linear: typedef removal: linear_conf_t -> struct linear_conf 2011-10-11 16:48:54 +11:00
Makefile md updates for 4.1 2015-04-24 09:28:01 -07:00
md-cluster.c md-cluster: re-add capabilities 2015-04-22 07:59:39 +10:00
md-cluster.h md-cluster: re-add capabilities 2015-04-22 07:59:39 +10:00
md.c Merge branch 'for-linus' of git://git.kernel.dk/linux-block 2015-05-08 19:49:35 -07:00
md.h md: remove 'go_faster' option from ->sync_request() 2015-04-22 08:00:40 +10:00
multipath.c md: rename ->stop to ->free 2015-02-04 08:35:52 +11:00
multipath.h md/multipath: typedef removal: multipath_conf_t -> struct mpconf 2011-10-11 16:48:57 +11:00
raid1.c md: remove 'go_faster' option from ->sync_request() 2015-04-22 08:00:40 +10:00
raid1.h md: make ->congested robust against personality changes. 2015-02-04 08:35:52 +11:00
raid5.c raid5: fix broken async operation chain 2015-05-21 09:14:20 +10:00
raid5.h md/raid5: allow the stripe_cache to grow and shrink. 2015-04-22 08:00:43 +10:00
raid10.c md: remove 'go_faster' option from ->sync_request() 2015-04-22 08:00:40 +10:00
raid10.h md: make ->congested robust against personality changes. 2015-02-04 08:35:52 +11:00
raid0.c md/raid0: fix restore to sector variable in raid0_make_request 2015-05-21 09:14:25 +10:00
raid0.h md: add proper merge_bvec handling to RAID0 and Linear. 2012-03-19 12:46:39 +11:00