Solaris 11 or Solaris 10 can panic with Deadlock: cycle in blocking chain when executing within zvol_close and zvol_update_minors ZFS code
(Doc ID 2402539.1)
Last updated on JULY 06, 2023
Applies to:
Solaris Operating System - Version 10 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:
turnstile_block
rw_enter_sleep
*
zvol_close
zfsdev_close
or
turnstile_block
mutex_vector_enter
*
zvol_update_minors
zfs_ioc_rename
Cause
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In this Document
| Symptoms |
| Cause |
| Solution |