Solaris 11 or Solaris 10 can panic with Deadlock: cycle in blocking chain

(Doc ID 2402539.1)

Last updated on MAY 23, 2018

Applies to:

Solaris Operating System - Version 10 3/05 to 11.3 [Release 10.0 to 11.0]
Oracle Solaris on SPARC (64-bit)
Oracle Solaris on x86-64 (64-bit)

Symptoms

The panic string will be: Deadlock: cycle in blocking chain

The panic stack will look similar to one of the two shown here:

genunix:turnstile_block
unix:rw_enter_sleep
zfs:zvol_close
zfs:zfsdev_close
genunix:dev_close
specfs:device_close
specfs:spec_close
genunix:fop_close
genunix:closef2
genunix:closef
genunix:closeandsetf
genunix:close
unix:brand_sys_sysenter

turnstile_block
mutex_vector_enter
zvol_update_minors
zfs_ioc_rename
zfsdev_ioctl_thread
thread_start

Cause

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