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5ae89a8720
kernel-ark/drivers/md
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Mike Snitzer 5ae89a8720 dm: linear support discard 
Allow discards to be passed through to linear mappings if at least one
underlying device supports it.  Discards will be forwarded only to
devices that support them.

A target that supports discards should set num_discard_requests to
indicate how many times each discard request must be submitted to it.

Verify table's underlying devices support discards prior to setting the
associated DM device as capable of discards (via QUEUE_FLAG_DISCARD).

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Reviewed-by: Joe Thornber <thornber@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2010-08-12 04:14:08 +01:00
..
.gitignore
bitmap.c md/bitmap: separate out loading a bitmap from initialising the structures. 2010-07-26 13:21:34 +10:00
bitmap.h md/bitmap: separate out loading a bitmap from initialising the structures. 2010-07-26 13:21:34 +10:00
dm-bio-record.h
dm-crypt.c dm crypt: simplify crypt_ctr 2010-08-12 04:14:07 +01:00
dm-delay.c dm table: remove unused dm_get_device range parameters 2010-03-06 02:32:27 +00:00
dm-exception-store.c dm snapshot: test chunk size against both origin and snapshot 2010-08-12 04:13:51 +01:00
dm-exception-store.h dm snapshot: test chunk size against both origin and snapshot 2010-08-12 04:13:51 +01:00
dm-io.c block: unify flags for struct bio and struct request 2010-08-07 18:20:39 +02:00
dm-ioctl.c dm: allow autoloading of dm mod 2010-08-12 04:14:05 +01:00
dm-kcopyd.c block: unify flags for struct bio and struct request 2010-08-07 18:20:39 +02:00
dm-linear.c dm: linear support discard 2010-08-12 04:14:08 +01:00
dm-log-userspace-base.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
dm-log-userspace-transfer.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
dm-log-userspace-transfer.h dm log: userspace add luid to distinguish between concurrent log instances 2009-09-04 20:40:34 +01:00
dm-log.c dm table: remove unused dm_get_device range parameters 2010-03-06 02:32:27 +00:00
dm-mpath.c dm mpath: fix NULL pointer dereference when path parameters missing 2010-08-12 04:13:49 +01:00
dm-mpath.h
dm-path-selector.c
dm-path-selector.h dm mpath: add start_io and nr_bytes to path selectors 2009-06-22 10:12:27 +01:00
dm-queue-length.c dm mpath: add queue length load balancer 2009-06-22 10:12:27 +01:00
dm-raid1.c block: unify flags for struct bio and struct request 2010-08-07 18:20:39 +02:00
dm-region-hash.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
dm-round-robin.c dm mpath: add start_io and nr_bytes to path selectors 2009-06-22 10:12:27 +01:00
dm-service-time.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
dm-snap-persistent.c dm snapshot: persistent use define for disk header chunk size 2010-08-12 04:13:59 +01:00
dm-snap-transient.c dm snapshot: move cow ref from exception store to snap core 2009-12-10 23:52:12 +00:00
dm-snap.c dm: rename map_info flush_request to target_request_nr 2010-08-12 04:14:04 +01:00
dm-stripe.c dm: rename map_info flush_request to target_request_nr 2010-08-12 04:14:04 +01:00
dm-sysfs.c Driver core: Constify struct sysfs_ops in struct kobj_type 2010-03-07 17:04:49 -08:00
dm-table.c dm: linear support discard 2010-08-12 04:14:08 +01:00
dm-target.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
dm-uevent.c dm table: remove dm_get from dm_table_get_md 2010-03-06 02:29:52 +00:00
dm-uevent.h
dm-zero.c
dm.c dm: linear support discard 2010-08-12 04:14:08 +01:00
dm.h dm: linear support discard 2010-08-12 04:14:08 +01:00
faulty.c Merge commit '3ff195b011d7decf501a4d55aeed312731094796' into for-linus 2010-05-22 08:31:36 +10:00
Kconfig Merge branch 'async' of macbook:git/btrfs-unstable 2010-08-09 10:36:44 +01:00
linear.c block: unify flags for struct bio and struct request 2010-08-07 18:20:39 +02:00
linear.h
Makefile Merge branch 'async' of macbook:git/btrfs-unstable 2010-08-09 10:36:44 +01:00
md.c Merge branch 'for-linus' of git://neil.brown.name/md 2010-08-10 15:38:19 -07:00
md.h Merge branch 'for-linus' of git://neil.brown.name/md 2010-08-10 15:38:19 -07:00
multipath.c block: unify flags for struct bio and struct request 2010-08-07 18:20:39 +02:00
multipath.h
raid0.c block: unify flags for struct bio and struct request 2010-08-07 18:20:39 +02:00
raid0.h md: fix handling of array level takeover that re-arranges devices. 2010-06-24 13:33:24 +10:00
raid1.c block: unify flags for struct bio and struct request 2010-08-07 18:20:39 +02:00
raid1.h md/raid1: add takeover support for raid5->raid1 2009-12-14 12:51:41 +11:00
raid5.c Merge branch 'for-linus' of git://neil.brown.name/md 2010-08-10 15:38:19 -07:00
raid5.h md/raid5: export raid5 unplugging interface. 2010-07-26 12:53:10 +10:00
raid10.c Merge branch 'for-linus' of git://neil.brown.name/md 2010-08-10 15:38:19 -07:00
raid10.h md: fix handling of array level takeover that re-arranges devices. 2010-06-24 13:33:24 +10:00