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null_blk: register as a LightNVM device

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Add support for registering as a LightNVM device. This allows us to
evaluate the performance of the LightNVM subsystem.

In /drivers/Makefile, LightNVM is moved above block device drivers
to make sure that the LightNVM media managers have been initialized
before drivers under /drivers/block are initialized.

Signed-off-by: Matias Bjørling <m@bjorling.me>
Fix by Jens Axboe to remove unneeded slab cache and the following
memory leak.
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Matias Bjørling
2015-11-12 20:25:10 +01:00
committed by Jens Axboe
parent 4736346bb4
commit b2b7e00148
3 changed files with 158 additions and 7 deletions
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3
Documentation/block/null_blk.txt
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@@ -70,3 +70,6 @@ use_per_node_hctx=[0/1]: Default: 0
parameter.
1: The multi-queue block layer is instantiated with a hardware dispatch
queue for each CPU node in the system.
use_lightnvm=[0/1]: Default: 0
Register device with LightNVM. Requires blk-mq to be used.