Unable to create a filesystem on fiber channel devices in Hyper-V guest systems.

Issue

• Unable to create a filesystem on fiber channel devices in Hyper-V guest systems.
• mkfs command goes to a hung state with the following PID stack.

root      249015  0.0  0.0   6544  2988 pts/0    -    21:52   0:00 mkfs.xfs -K /dev/mapper/VG_APP-LV_APP

[<0>] rq_qos_wait+0xbb/0x130
[<0>] wbt_wait+0x9c/0x100
[<0>] __rq_qos_throttle+0x20/0x40
[<0>] blk_mq_get_new_requests+0xcf/0x190
[<0>] blk_mq_submit_bio+0x2ba/0x3f0
[<0>] __submit_bio_noacct+0x81/0x1f0
[<0>] blk_next_bio+0x59/0x70
[<0>] __blkdev_issue_zero_pages+0xaa/0x150
[<0>] blkdev_issue_zeroout+0xd3/0x200
[<0>] blkdev_fallocate+0x14a/0x1b0
[<0>] vfs_fallocate+0x148/0x330
[<0>] __x64_sys_fallocate+0x3c/0x70
[<0>] do_syscall_64+0x59/0x90
[<0>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

• System logs filled with following errors.

[368011.894495] hv_storvsc ec179751-a4d4-45d5-a3b2-9d1e65fbfde8: tag#1240 cmd 0x2a status: scsi 0x0 srb 0x30 hv 0xc0000001
[368011.894582] hv_storvsc 2dd27aed-d462-4fdc-bf25-efd65ce25c76: tag#1485 cmd 0x2a status: scsi 0x0 srb 0x30 hv 0xc0000001
[368011.894654] hv_storvsc ec179751-a4d4-45d5-a3b2-9d1e65fbfde8: tag#1251 cmd 0x2a status: scsi 0x0 srb 0x30 hv 0xc0000001