From: Matthew Sakai <msa...@redhat.com>
The dm-vdo target is 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. Thus 32-bit platforms are deemed unlikely to be
good candidates for benefiting from a vdo target, and thus dm-vdo is
targeted only at 64-bit platforms.
Co-developed-by: J. corwin Coburn <cor...@hurlbutnet.net>
Signed-off-by: J. corwin Coburn <cor...@hurlbutnet.net>
Co-developed-by: John Wiele <jwi...@redhat.com>
Signed-off-by: John Wiele <jwi...@redhat.com>
Signed-off-by: Matthew Sakai <msa...@redhat.com>
Signed-off-by: Mike Snitzer <snit...@kernel.org>
---
drivers/md/Kconfig | 16 ++++++++++++++++
drivers/md/Makefile | 2 ++
2 files changed, 18 insertions(+)
diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig
index b0a22e99bade..9fa9dec10292 100644
--- a/drivers/md/Kconfig
+++ b/drivers/md/Kconfig
@@ -521,6 +521,22 @@ 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
diff --git a/drivers/md/Makefile b/drivers/md/Makefile
index 84291e38dca8..47444b393abb 100644
--- a/drivers/md/Makefile
+++ b/drivers/md/Makefile
@@ -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 $(src)/dm-vdo/*.c))
dm-zoned-y += dm-zoned-target.o dm-zoned-metadata.o dm-zoned-reclaim.o
md-mod-y += md.o md-bitmap.o
@@ -74,6 +75,7 @@ obj-$(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
--
2.40.0
--
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