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dm-writecache

PATCH In review Mikulas Patocka 1 participant 1 message May 30, 2018

Subsystems (3)
Documentation MD RAID Device mapper
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Mikulas Patocka

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PATCH 4/4 dm-writecache

The dm-writecache target.

Signed-off-by Mikulas Patocka <[email protected]>
---
 Documentation/device-mapper/writecache.txt |   68 
 drivers/md/Kconfig                         |   11 
 drivers/md/Makefile                        |    1 
 drivers/md/dm-writecache.c                 | 2382 +++++++++++++++++++++++++++++
 4 files changed, 2462 insertions(+)
drivers/md/Kconfig +11 -0
Index: linux-2.6/drivers/md/Kconfig
===================================================================
@@ -334,6 +334,17 @@ config DM_CACHE_SMQ
          of less memory utilization, improved performance and increased
          adaptability in the face of changing workloads.
 
+config DM_WRITECACHE
+	tristate "Writecache target"
+	depends on BLK_DEV_DM
+	---help---
+	   The writecache target caches writes on persistent memory or SSD.
+	   It is intended for databases or other programs that need extremely
+	   low commit latency.
+
+	   The writecache target doesn't cache reads because reads are supposed
+	   to be cached in standard RAM.
+
 config DM_ERA
        tristate "Era target (EXPERIMENTAL)"
        depends on BLK_DEV_DM
drivers/md/Makefile +1 -0
Index: linux-2.6/drivers/md/Makefile
===================================================================
@@ -67,6 +67,7 @@ obj-$(CONFIG_DM_ERA)		+= dm-era.o
 obj-$(CONFIG_DM_LOG_WRITES)	+= dm-log-writes.o
 obj-$(CONFIG_DM_INTEGRITY)	+= dm-integrity.o
 obj-$(CONFIG_DM_ZONED)		+= dm-zoned.o
+obj-$(CONFIG_DM_WRITECACHE)	+= dm-writecache.o
 
 ifeq ($(CONFIG_DM_UEVENT),y)
 dm-mod-objs			+= dm-uevent.o
drivers/md/dm-writecache.c new file +2382 -0

2,382 lines not on this page · raw message

Documentation/device-mapper/writecache.txt new file +68 -0

68 lines not on this page · raw message