162306a36Sopenharmony_ciWhat: /sys/block/dm-<num>/dm/name 262306a36Sopenharmony_ciDate: January 2009 362306a36Sopenharmony_ciKernelVersion: 2.6.29 462306a36Sopenharmony_ciContact: dm-devel@redhat.com 562306a36Sopenharmony_ciDescription: Device-mapper device name. 662306a36Sopenharmony_ci Read-only string containing mapped device name. 762306a36Sopenharmony_ciUsers: util-linux, device-mapper udev rules 862306a36Sopenharmony_ci 962306a36Sopenharmony_ciWhat: /sys/block/dm-<num>/dm/uuid 1062306a36Sopenharmony_ciDate: January 2009 1162306a36Sopenharmony_ciKernelVersion: 2.6.29 1262306a36Sopenharmony_ciContact: dm-devel@redhat.com 1362306a36Sopenharmony_ciDescription: Device-mapper device UUID. 1462306a36Sopenharmony_ci Read-only string containing DM-UUID or empty string 1562306a36Sopenharmony_ci if DM-UUID is not set. 1662306a36Sopenharmony_ciUsers: util-linux, device-mapper udev rules 1762306a36Sopenharmony_ci 1862306a36Sopenharmony_ciWhat: /sys/block/dm-<num>/dm/suspended 1962306a36Sopenharmony_ciDate: June 2009 2062306a36Sopenharmony_ciKernelVersion: 2.6.31 2162306a36Sopenharmony_ciContact: dm-devel@redhat.com 2262306a36Sopenharmony_ciDescription: Device-mapper device suspend state. 2362306a36Sopenharmony_ci Contains the value 1 while the device is suspended. 2462306a36Sopenharmony_ci Otherwise it contains 0. Read-only attribute. 2562306a36Sopenharmony_ciUsers: util-linux, device-mapper udev rules 2662306a36Sopenharmony_ci 2762306a36Sopenharmony_ciWhat: /sys/block/dm-<num>/dm/rq_based_seq_io_merge_deadline 2862306a36Sopenharmony_ciDate: March 2015 2962306a36Sopenharmony_ciKernelVersion: 4.1 3062306a36Sopenharmony_ciContact: dm-devel@redhat.com 3162306a36Sopenharmony_ciDescription: Allow control over how long a request that is a 3262306a36Sopenharmony_ci reasonable merge candidate can be queued on the request 3362306a36Sopenharmony_ci queue. The resolution of this deadline is in 3462306a36Sopenharmony_ci microseconds (ranging from 1 to 100000 usecs). 3562306a36Sopenharmony_ci Setting this attribute to 0 (the default) will disable 3662306a36Sopenharmony_ci request-based DM's merge heuristic and associated extra 3762306a36Sopenharmony_ci accounting. This attribute is not applicable to 3862306a36Sopenharmony_ci bio-based DM devices so it will only ever report 0 for 3962306a36Sopenharmony_ci them. 4062306a36Sopenharmony_ci 4162306a36Sopenharmony_ciWhat: /sys/block/dm-<num>/dm/use_blk_mq 4262306a36Sopenharmony_ciDate: March 2015 4362306a36Sopenharmony_ciKernelVersion: 4.1 4462306a36Sopenharmony_ciContact: dm-devel@redhat.com 4562306a36Sopenharmony_ciDescription: Request-based Device-mapper blk-mq I/O path mode. 4662306a36Sopenharmony_ci Contains the value 1 if the device is using blk-mq. 4762306a36Sopenharmony_ci Otherwise it contains 0. Read-only attribute. 48