rwsem lock breakage with task sleeping in rwsem_down_read_failed

Solution Verified - Updated -

Issue

  • PPC64 systems are experiencing intermittent hangs and I/Os seem to stop

Environment

  • Red Hat Enterprise Linux (RHEL) 7 PPC64
    • Seen in kernel 3.10.0-514.26.2.el7.ppc64
    • Fixed in kernel-3.10.0-862.14.4.el7.ppc64 (Unverified)

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