Processes performing I/O do not fail on degraded LVM RAID and IO process hangs

Issue

• Processes performing I/O do not fail on degraded LVM RAID and IO process hangs

Reproducer :

Working setup :

# lvs -a -o +devices |grep lvol0
  lvol0            testvg    rwi-aor--- 20.00g                                    100.00           lvol0_rimage_0(0),lvol0_rimage_1(0),lvol0_rimage_2(0)
  [lvol0_rimage_0] testvg    iwi-aor--- 10.00g                                                     /dev/sdb(1)                                          
  [lvol0_rimage_1] testvg    iwi-aor--- 10.00g                                                     /dev/sdc(1)                                          
  [lvol0_rimage_2] testvg    iwi-aor--- 10.00g                                                     /dev/sdd(1)                                          
  [lvol0_rmeta_0]  testvg    ewi-aor---  4.00m                                                     /dev/sdb(0)                                          
  [lvol0_rmeta_1]  testvg    ewi-aor---  4.00m                                                     /dev/sdc(0)                                          
  [lvol0_rmeta_2]  testvg    ewi-aor---  4.00m                                                     /dev/sdd(0)    


df -h
/dev/mapper/testvg-lvol0     20G   45M   19G   1% /mnt

Broken the LVM here

# echo 1 > /sys/block/sdc/device/delete 
# echo 1 > /sys/block/sdd/device/delete 

Running fio hangs.

# ps aux |grep fio |grep -v color
root       95962  2.9 29.9 1662868 1146184 pts/1 Dl+  18:43   0:00 fio --rw=write --randrepeat=0 --bsrange=4k-8k --name=test1 --filename=/mnt/file1 --ioengine=libaio --numjobs=1 --runtime=600 --direct=0 --iodepth=64 --size=5G