From bf9fc98b736b8a3837040d5ce3a7caf04fa0859c Mon Sep 17 00:00:00 2001 From: Minwoo Im Date: Tue, 7 Nov 2017 09:25:37 -0700 Subject: null_blk: add an usage for shared tags in documentation Add usage explanation for a shared_tags, introduced by commit: 82f402fefa50 ("null_blk: add support for shared tags") Signed-off-by: Minwoo Im Reworded slightly. Signed-off-by: Jens Axboe --- Documentation/block/null_blk.txt | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'Documentation/block') diff --git a/Documentation/block/null_blk.txt b/Documentation/block/null_blk.txt index fcf7f8487d8e..733927a7b501 100644 --- a/Documentation/block/null_blk.txt +++ b/Documentation/block/null_blk.txt @@ -77,3 +77,8 @@ use_lightnvm=[0/1]: Default: 0 no_sched=[0/1]: Default: 0 0: nullb* use default blk-mq io scheduler. 1: nullb* doesn't use io scheduler. + +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. -- cgit v1.2.3-55-g7522