11d330ec6SMilan BrozWhat:		/sys/block/dm-<num>/dm/name
21d330ec6SMilan BrozDate:		January 2009
31d330ec6SMilan BrozKernelVersion:	2.6.29
41d330ec6SMilan BrozContact:	dm-devel@redhat.com
51d330ec6SMilan BrozDescription:	Device-mapper device name.
61d330ec6SMilan Broz		Read-only string containing mapped device name.
71d330ec6SMilan BrozUsers:		util-linux, device-mapper udev rules
81d330ec6SMilan Broz
91d330ec6SMilan BrozWhat:		/sys/block/dm-<num>/dm/uuid
101d330ec6SMilan BrozDate:		January 2009
111d330ec6SMilan BrozKernelVersion:	2.6.29
121d330ec6SMilan BrozContact:	dm-devel@redhat.com
131d330ec6SMilan BrozDescription:	Device-mapper device UUID.
141d330ec6SMilan Broz		Read-only string containing DM-UUID or empty string
151d330ec6SMilan Broz		if DM-UUID is not set.
161d330ec6SMilan BrozUsers:		util-linux, device-mapper udev rules
171d330ec6SMilan Broz
181d330ec6SMilan BrozWhat:		/sys/block/dm-<num>/dm/suspended
191d330ec6SMilan BrozDate:		June 2009
201d330ec6SMilan BrozKernelVersion:	2.6.31
211d330ec6SMilan BrozContact:	dm-devel@redhat.com
221d330ec6SMilan BrozDescription:	Device-mapper device suspend state.
231d330ec6SMilan Broz		Contains the value 1 while the device is suspended.
241d330ec6SMilan Broz		Otherwise it contains 0. Read-only attribute.
251d330ec6SMilan BrozUsers:		util-linux, device-mapper udev rules
260ce65797SMike Snitzer
270ce65797SMike SnitzerWhat:		/sys/block/dm-<num>/dm/rq_based_seq_io_merge_deadline
280ce65797SMike SnitzerDate:		March 2015
290ce65797SMike SnitzerKernelVersion:	4.1
300ce65797SMike SnitzerContact:	dm-devel@redhat.com
310ce65797SMike SnitzerDescription:	Allow control over how long a request that is a
320ce65797SMike Snitzer		reasonable merge candidate can be queued on the request
330ce65797SMike Snitzer		queue.  The resolution of this deadline is in
340ce65797SMike Snitzer		microseconds (ranging from 1 to 100000 usecs).
350ce65797SMike Snitzer		Setting this attribute to 0 (the default) will disable
360ce65797SMike Snitzer		request-based DM's merge heuristic and associated extra
370ce65797SMike Snitzer		accounting.  This attribute is not applicable to
380ce65797SMike Snitzer		bio-based DM devices so it will only ever report 0 for
390ce65797SMike Snitzer		them.
4017e149b8SMike Snitzer
4117e149b8SMike SnitzerWhat:		/sys/block/dm-<num>/dm/use_blk_mq
4217e149b8SMike SnitzerDate:		March 2015
4317e149b8SMike SnitzerKernelVersion:	4.1
4417e149b8SMike SnitzerContact:	dm-devel@redhat.com
4517e149b8SMike SnitzerDescription:	Request-based Device-mapper blk-mq I/O path mode.
4617e149b8SMike Snitzer		Contains the value 1 if the device is using blk-mq.
4717e149b8SMike Snitzer		Otherwise it contains 0. Read-only attribute.
48