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null_blk: multi queue aware block test driver

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A driver that simply completes IO it receives, it does no
transfers. Written to fascilitate testing of the blk-mq code.
It supports various module options to use either bio queueing,
rq queueing, or mq mode.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe
2013-10-25 11:52:25 +01:00
parent 320ae51fee
commit f2298c0403
3 changed files with 639 additions and 0 deletions
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3
drivers/block/Kconfig
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@@ -15,6 +15,9 @@ menuconfig BLK_DEV
if BLK_DEV
config BLK_DEV_NULL_BLK
tristate "Null test block driver"
config BLK_DEV_FD
tristate "Normal floppy disk support"
depends on ARCH_MAY_HAVE_PC_FDC

1
drivers/block/Makefile
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@@ -41,6 +41,7 @@ obj-$(CONFIG_BLK_DEV_RBD) += rbd.o
obj-$(CONFIG_BLK_DEV_PCIESSD_MTIP32XX) += mtip32xx/
obj-$(CONFIG_BLK_DEV_RSXX) += rsxx/
obj-$(CONFIG_BLK_DEV_NULL_BLK) += null_blk.o
nvme-y := nvme-core.o nvme-scsi.o
swim_mod-y := swim.o swim_asm.o

635
drivers/block/null_blk.c Normal file
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