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

(Doc ID 2405194.1)

Last updated on MAY 30, 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 be similar to one of the following:

either this:

turnstile_block
mutex_vector_enter
dmu_objset_set_user
zvol_last_close_locked
zvol_close
zfsdev_close
dev_close
device_close
spec_close
fop_close
closef2
closef
closeall
proc_exit
exit
rexit
sys_syscall

or this:

turnstile_block
mutex_vector_enter
zvol_calc_reservation
zfs_zprop_zvol_update_refres
zfs_zprop_set_special
zfs_zprop_set_nvlist_impl
zfs_zprop_set_nvlist_with_granted
zfs_ioc_create
zfsdev_ioctl_task
taskq_d_thread
thread_start

Cause

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