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| author | Liu Bo <bo.liu@linux.alibaba.com> | 2018-05-25 22:40:04 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-05-25 08:51:58 -0600 |
| commit | 6723d8dc9d3b07dcd9d8ac501be15bfe1319b650 (patch) | |
| tree | 8651953cfb1778c254934cceefd98a0bce244316 /Documentation | |
| parent | 5657a819a8d94426c76be04dcedfad0f64cfff00 (diff) | |
| download | linux-0-day-6723d8dc9d3b07dcd9d8ac501be15bfe1319b650.tar.gz linux-0-day-6723d8dc9d3b07dcd9d8ac501be15bfe1319b650.tar.xz | |
null_blk: add blocking description and remove lightnvm
- The description of 'blocking' is missing in null_blk.txt
- The 'lightnvm' parameter has been removed in null_blk.c
This updates both in null_blk.txt.
Signed-off-by: Liu Bo <bo.liu@linux.alibaba.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/block/null_blk.txt | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/Documentation/block/null_blk.txt b/Documentation/block/null_blk.txt index 733927a7b501a..07f147381f327 100644 --- a/Documentation/block/null_blk.txt +++ b/Documentation/block/null_blk.txt @@ -71,13 +71,16 @@ use_per_node_hctx=[0/1]: Default: 0 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 and CONFIG_NVM to be enabled. - no_sched=[0/1]: Default: 0 0: nullb* use default blk-mq io scheduler. 1: nullb* doesn't use io scheduler. +blocking=[0/1]: Default: 0 + 0: Register as a non-blocking blk-mq driver device. + 1: Register as a blocking blk-mq driver device, null_blk will set + the BLK_MQ_F_BLOCKING flag, indicating that it sometimes/always + needs to block in its ->queue_rq() function. + shared_tags=[0/1]: Default: 0 0: Tag set is not shared. 1: Tag set shared between devices for blk-mq. Only makes sense with |