XEN virtual system hang due to hypervisor stall

Solution Unverified - Updated -


  • XEN virtual system hang due to hypervisor stall:
INFO: task mdsd:2236 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
mdsd            D ffffa0ef8985f6c0     0  2236      1 0x00000080
Call Trace:
 [<ffffffffb35b7ca9>] schedule+0x29/0x70
 [<ffffffffc0397b73>] xfs_log_force_lsn+0x1a3/0x370 [xfs]
 [<ffffffffb2ee1170>] ? wake_up_state+0x20/0x20
 [<ffffffffc037751d>] xfs_file_fsync+0xfd/0x1c0 [xfs]
 [<ffffffffb30930d5>] do_fsync+0x55/0x80
 [<ffffffffb30933c3>] SyS_fdatasync+0x13/0x20
 [<ffffffffb35c539a>] system_call_fastpath+0x25/0x2a


  • Red Hat Enterprise Linux 7
  • Virtual system backed by XEN hypervisor

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