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dm vdo: enable configuration and building of dm-vdo

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dm-vdo targets are not supported for 32-bit configurations. A vdo target
typically requires 1 to 1.5 GB of memory at any given time, which is likely
a large fraction of the addressable memory of a 32-bit system. At the same
time, the amount of addressable storage attached to a 32-bit system may not
be large enough for deduplication to provide much benefit. Because of these
concerns, 32-bit platforms are deemed unlikely to benefit from using a vdo
target, so dm-vdo is targeted only at 64-bit platforms.

Co-developed-by: J. corwin Coburn <corwin@hurlbutnet.net>
Signed-off-by: J. corwin Coburn <corwin@hurlbutnet.net>
Co-developed-by: John Wiele <jwiele@redhat.com>
Signed-off-by: John Wiele <jwiele@redhat.com>
Signed-off-by: Matthew Sakai <msakai@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
This commit is contained in:
Matthew Sakai 2023-11-16 21:28:35 -05:00 committed by Mike Snitzer
parent 03d1e20fa1
commit f11aca85b0
2 changed files with 18 additions and 0 deletions
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16
drivers/md/Kconfig
View file

@ -498,6 +498,22 @@ config DM_FLAKEY
help
A target that intermittently fails I/O for debugging purposes.
config DM_VDO
tristate "VDO: deduplication and compression target"
depends on 64BIT
depends on BLK_DEV_DM
select DM_BUFIO
select LZ4_COMPRESS
select LZ4_DECOMPRESS
help
This device mapper target presents a block device with
deduplication, compression and thin-provisioning.
To compile this code as a module, choose M here: the module will
be called dm-vdo.
If unsure, say N.
config DM_VERITY
tristate "Verity target support"
depends on BLK_DEV_DM

2
drivers/md/Makefile
View file

@ -25,6 +25,7 @@ dm-ebs-y += dm-ebs-target.o
dm-era-y += dm-era-target.o
dm-clone-y += dm-clone-target.o dm-clone-metadata.o
dm-verity-y += dm-verity-target.o
dm-vdo-y += dm-vdo-target.o $(patsubst drivers/md/dm-vdo/%.c,dm-vdo/%.o,$(wildcard $(src)/dm-vdo/*.c))
dm-zoned-y += dm-zoned-target.o dm-zoned-metadata.o dm-zoned-reclaim.o
md-mod-y += md.o md-bitmap.o
@ -68,6 +69,7 @@ obj-$(CONFIG_DM_ZERO) += dm-zero.o
obj-$(CONFIG_DM_RAID) += dm-raid.o
obj-$(CONFIG_DM_THIN_PROVISIONING) += dm-thin-pool.o
obj-$(CONFIG_DM_VERITY) += dm-verity.o
obj-$(CONFIG_DM_VDO) += dm-vdo.o
obj-$(CONFIG_DM_CACHE) += dm-cache.o
obj-$(CONFIG_DM_CACHE_SMQ) += dm-cache-smq.o
obj-$(CONFIG_DM_EBS) += dm-ebs.o