Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / ABI / testing / sysfs-block-dm

diff --git a/kernel/Documentation/ABI/testing/sysfs-block-dm b/kernel/Documentation/ABI/testing/sysfs-block-dm
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+What:          /sys/block/dm-<num>/dm/name
+Date:          January 2009
+KernelVersion: 2.6.29
+Contact:       dm-devel@redhat.com
+Description:   Device-mapper device name.
+               Read-only string containing mapped device name.
+Users:         util-linux, device-mapper udev rules
+
+What:          /sys/block/dm-<num>/dm/uuid
+Date:          January 2009
+KernelVersion: 2.6.29
+Contact:       dm-devel@redhat.com
+Description:   Device-mapper device UUID.
+               Read-only string containing DM-UUID or empty string
+               if DM-UUID is not set.
+Users:         util-linux, device-mapper udev rules
+
+What:          /sys/block/dm-<num>/dm/suspended
+Date:          June 2009
+KernelVersion: 2.6.31
+Contact:       dm-devel@redhat.com
+Description:   Device-mapper device suspend state.
+               Contains the value 1 while the device is suspended.
+               Otherwise it contains 0. Read-only attribute.
+Users:         util-linux, device-mapper udev rules
+
+What:          /sys/block/dm-<num>/dm/rq_based_seq_io_merge_deadline
+Date:          March 2015
+KernelVersion: 4.1
+Contact:       dm-devel@redhat.com
+Description:   Allow control over how long a request that is a
+               reasonable merge candidate can be queued on the request
+               queue.  The resolution of this deadline is in
+               microseconds (ranging from 1 to 100000 usecs).
+               Setting this attribute to 0 (the default) will disable
+               request-based DM's merge heuristic and associated extra
+               accounting.  This attribute is not applicable to
+               bio-based DM devices so it will only ever report 0 for
+               them.
+
+What:          /sys/block/dm-<num>/dm/use_blk_mq
+Date:          March 2015
+KernelVersion: 4.1
+Contact:       dm-devel@redhat.com
+Description:   Request-based Device-mapper blk-mq I/O path mode.
+               Contains the value 1 if the device is using blk-mq.
+               Otherwise it contains 0. Read-only attribute.