Mikulas Patocka f9a8e0cd26 dm thin: optimize power of two block size ...

dm-thin will be most likely used with a block size that is a power of
two. So it should be optimized for this case.

This patch changes division and modulo operations to shifts and bit
masks if block size is a power of two.

A test that bi_sector is divisible by a block size is removed from
io_overlaps_block. Device mapper never sends bios that span a block
boundary. Consequently, if we tested that bi_size is equivalent to block
size, bi_sector must already be on a block boundary.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

2012-07-27 15:08:03 +01:00

..

persistent-data

dm persistent data: remove debug space map checker

2012-07-27 15:07:58 +01:00

bitmap.c

md/bitmap: record the space available for the bitmap in the superblock.

2012-05-22 13:55:34 +10:00

bitmap.h

md/bitmap: record the space available for the bitmap in the superblock.

2012-05-22 13:55:34 +10:00

dm-bio-record.h

dm: preserve bi_io_vec when resubmitting bios

2009-04-02 19:55:23 +01:00

dm-bufio.c

dm bufio: prefetch

2012-03-28 18:41:29 +01:00

dm-bufio.h

dm bufio: prefetch

2012-03-28 18:41:29 +01:00

dm-crypt.c

dm: replace simple_strtoul

2012-07-27 15:07:59 +01:00

dm-delay.c

dm: reject trailing characters in sccanf input

2012-03-28 18:41:26 +01:00

dm-exception-store.c

dm: replace simple_strtoul

2012-07-27 15:07:59 +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-flakey.c

dm: reject trailing characters in sccanf input

2012-03-28 18:41:26 +01:00

dm-io.c

dm io: fix discard support

2012-03-07 19:09:37 +00:00

dm-ioctl.c

dm: reject trailing characters in sccanf input

2012-03-28 18:41:26 +01:00

dm-kcopyd.c

dm kcopyd: add dm_kcopyd_zero to zero an area

2011-10-31 20:18:58 +00:00

dm-linear.c

dm: reject trailing characters in sccanf input

2012-03-28 18:41:26 +01:00

dm-log-userspace-base.c

Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux

2011-11-06 19:44:47 -08:00

dm-log-userspace-transfer.c

connector/userns: replace netlink uses of cap_raised() with capable()

2012-05-10 23:21:39 -04:00

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: reject trailing characters in sccanf input

2012-03-28 18:41:26 +01:00

dm-mpath.c

dm mpath: allow ioctls to trigger pg init

2012-06-03 00:29:58 +01:00

dm-mpath.h

dm mpath: remove is_active from struct dm_path

2008-10-10 13:36:58 +01:00

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 mpath: add start_io and nr_bytes to path selectors

2009-06-22 10:12:27 +01:00

dm-queue-length.c

dm: reject trailing characters in sccanf input

2012-03-28 18:41:26 +01:00

dm-raid1.c

dm: support non power of two target max_io_len

2012-07-27 15:08:00 +01:00

dm-raid.c

dm: support non power of two target max_io_len

2012-07-27 15:08:00 +01:00

dm-region-hash.c

dm raid1: fix crash with mirror recovery and discard

2012-07-20 14:25:03 +01:00

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

md: Add in export.h for files using EXPORT_SYMBOL

2011-10-31 19:31:19 -04:00

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

dm: support non power of two target max_io_len

2012-07-27 15:08:00 +01:00

dm-stripe.c

dm stripe: optimize chunk_size calculations

2012-07-27 15:08:02 +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: reject trailing characters in sccanf input

2012-03-28 18:41:26 +01:00

dm-target.c

dm: error return error for discards

2010-08-12 04:14:14 +01:00

dm-thin-metadata.c

dm thin metadata: introduce THIN_MAX_CONCURRENT_LOCKS

2012-07-27 15:07:58 +01:00

dm-thin-metadata.h

dm thin: clean up compiler warning

2012-07-27 15:07:57 +01:00

dm-thin.c

dm thin: optimize power of two block size

2012-07-27 15:08:03 +01:00

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: uevent generate events

2007-10-20 02:01:26 +01:00

dm-verity.c

dm: add verity target

2012-03-28 18:43:38 +01:00

dm-zero.c

dm: zero silently drop discards

2010-08-12 04:14:12 +01:00

dm.c

dm: introduce split_discard_requests

2012-07-27 15:08:03 +01:00

dm.h

dm table: add immutable feature

2011-10-31 20:19:04 +00:00

faulty.c

md: tidy up rdev_for_each usage.

2012-03-19 12:46:39 +11:00

Kconfig

dm persistent data: remove debug space map checker

2012-07-27 15:07:58 +01:00

linear.c

md/linear: If md_integrity_register() fails, linear_run() must free the mem.

2012-04-02 09:48:37 +10:00

linear.h

md/linear: typedef removal: linear_conf_t -> struct linear_conf

2011-10-11 16:48:54 +11:00

Makefile

dm: add verity target

2012-03-28 18:43:38 +01:00

md.c

md: avoid crash when stopping md array races with closing other open fds.

2012-07-19 15:59:18 +10:00

md.h

md/bitmap: add new 'space' attribute for bitmaps.

2012-05-22 13:55:07 +10:00

multipath.c

md: make 'name' arg to md_register_thread non-optional.

2012-07-03 15:56:52 +10:00

multipath.h

md/multipath: typedef removal: multipath_conf_t -> struct mpconf

2011-10-11 16:48:57 +11:00

raid0.c

md: Avoid OOPS when reshaping raid1 to raid0

2012-04-03 15:37:26 +10:00

raid0.h

md: add proper merge_bvec handling to RAID0 and Linear.

2012-03-19 12:46:39 +11:00

raid1.c

md/raid1: close some possible races on write errors during resync

2012-07-19 15:59:18 +10:00

raid1.h

md/raid1: Allocate spare to store replacement devices and their bios.

2011-12-23 10:17:56 +11:00

raid5.c

md: fix up plugging (again).

2012-07-03 17:45:31 +10:00

raid5.h

raid5: support sync request

2012-05-22 13:55:05 +10:00

raid10.c

md/raid10: fix careless build error

2012-07-04 09:35:35 +10:00

raid10.h

md/raid10: add reshape support

2012-05-22 13:53:47 +10:00