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2016-11-16null_blk: add usage hints for NVMYasuaki Ishimatsu1-1/+1
If CONFIG_NVM is disabled, loading null_block module with use_lightnvm=1 fails. But there are no messages and documents related to the failure. Add the appropriate error message. Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Massaged the text a bit. Signed-off-by: Jens Axboe <axboe@fb.com>
2015-11-16null_blk: register as a LightNVM deviceMatias Bjørling1-0/+3
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>
2014-08-26Documentation: Fix null_blk parameter irq_mode to irqmodeFam Zheng1-2/+2
To match the real module parameter name we implemented. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2013-12-21null_blk: set use_per_node_hctx param to falseMatias Bjørling1-4/+5
The defaults for the module is to instantiate itself with blk-mq and a submit queue for each CPU node in the system. To save resources, initialize instead with a single submit queue. Signed-off-by: Matias Bjorling <m@bjorling.me> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2013-12-21null_blk: corrections to documentationMatias Bjørling1-10/+10
Randy Dunlap reported a couple of grammar errors and unfortunate usages of socket/node/core. Signed-off-by: Matias Bjorling <m@bjorling.me> Acked-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2013-12-19null_blk: documentationMatias Bjorling1-0/+71
Add description of module and its parameters. Signed-off-by: Matias Bjorling <m@bjorling.me> Signed-off-by: Jens Axboe <axboe@kernel.dk>