XFS filesystem hosted by MD RAID storage hangs with no pending IO to be found

Solution Verified - Updated -

Issue

System hangs with many tasks blocked waiting for XFS filesystem IO completion. The console usually shows messages like

INFO: task xfsaild/md4:7513 blocked for more than 120 seconds.

Environment

  • Red Hat Enterprise Linux 7
  • XFS
  • MD Raid based storage

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