1 What: /sys/block/dm-<num>/dm/name
2 Date: January 2009
3 KernelVersion: 2.6.29
4 Contact: dm-devel@redhat.com
5 Description: Device-mapper device name.
6 Read-only string containing ma
7 Users: util-linux, device-mapper udev
8
9 What: /sys/block/dm-<num>/dm/uuid
10 Date: January 2009
11 KernelVersion: 2.6.29
12 Contact: dm-devel@redhat.com
13 Description: Device-mapper device UUID.
14 Read-only string containing DM
15 if DM-UUID is not set.
16 Users: util-linux, device-mapper udev
17
18 What: /sys/block/dm-<num>/dm/suspend
19 Date: June 2009
20 KernelVersion: 2.6.31
21 Contact: dm-devel@redhat.com
22 Description: Device-mapper device suspend s
23 Contains the value 1 while the
24 Otherwise it contains 0. Read-
25 Users: util-linux, device-mapper udev
26
27 What: /sys/block/dm-<num>/dm/rq_base
28 Date: March 2015
29 KernelVersion: 4.1
30 Contact: dm-devel@redhat.com
31 Description: Allow control over how long a
32 reasonable merge candidate can
33 queue. The resolution of this
34 microseconds (ranging from 1 t
35 Setting this attribute to 0 (t
36 request-based DM's merge heuri
37 accounting. This attribute is
38 bio-based DM devices so it wil
39 them.
40
41 What: /sys/block/dm-<num>/dm/use_blk
42 Date: March 2015
43 KernelVersion: 4.1
44 Contact: dm-devel@redhat.com
45 Description: Request-based Device-mapper bl
46 Contains the value 1 if the de
47 Otherwise it contains 0. Read-
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