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| author | Matias Bjørling <matias.bjorling@wdc.com> | 2018-07-06 19:38:39 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-07-09 09:07:55 -0600 |
| commit | ca4b2a011948fae4e4d31490107db4926385a983 (patch) | |
| tree | 4fb64aaae7642ec180fae7d9afd16ccd2c09b881 /Documentation/block | |
| parent | 6dad38d38f20c0c8a84b5ae4f23c62b2c8758ec5 (diff) | |
| download | linux-ca4b2a011948fae4e4d31490107db4926385a983.tar.gz linux-ca4b2a011948fae4e4d31490107db4926385a983.tar.bz2 linux-ca4b2a011948fae4e4d31490107db4926385a983.zip | |
null_blk: add zone support
Adds support for exposing a null_blk device through the zone device
interface.
The interface is managed with the parameters zoned and zone_size.
If zoned is set, the null_blk instance registers as a zoned block
device. The zone_size parameter defines how big each zone will be.
Signed-off-by: Matias Bjørling <matias.bjorling@wdc.com>
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'Documentation/block')
| -rw-r--r-- | Documentation/block/null_blk.txt | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/block/null_blk.txt b/Documentation/block/null_blk.txt index 07f147381f32..ea2dafe49ae8 100644 --- a/Documentation/block/null_blk.txt +++ b/Documentation/block/null_blk.txt @@ -85,3 +85,10 @@ 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 nr_devices > 1, otherwise there's no tag set to share. + +zoned=[0/1]: Default: 0 + 0: Block device is exposed as a random-access block device. + 1: Block device is exposed as a host-managed zoned block device. + +zone_size=[MB]: Default: 256 + Per zone size when exposed as a zoned block device. Must be a power of two. |