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block: null: Add documentation for "zone_nr_conv" param 

zone_nr_conv module parameter was introduced by a commit
ea2c18e1("null_blk: Add conventional zone configuration for zoned
support").

This patch describes "zone_nr_conv" module parameter to the document.

Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Minwoo Im 2019-04-07 17:19:38 +09:00 committed by Jens Axboe
parent b21e11c5c8
commit 0d413829bd
1 changed files with 4 additions and 0 deletions
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4
Documentation/block/null_blk.txt
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@ -93,3 +93,7 @@ zoned=[0/1]: Default: 0
zone_size=[MB]: Default: 256
Per zone size when exposed as a zoned block device. Must be a power of two.
zone_nr_conv=[nr_conv]: Default: 0
The number of conventional zones to create when block device is zoned. If
zone_nr_conv >= nr_zones, it will be reduced to nr_zones - 1.