In affected releases prior to the introduction of the option "cifs.smb2.signing.multiprocessing" there is an internal workaround available to customers via support.
In releases that have the options "cifs.smb2.signing.multiprocessing" there are 3 states. default, enabled, and disabled.
default=use whatever the default is for that ontap release. Signifies it has not specifically been set by the customer.
enabled/disabled=user specified operating modes.
Or like it says in the man page:
cifs.smb2.signing.multiprocessing
This option controls the SMB2 multiprocessor signing
optimization feature. If this option is enabled, it
allows CIFS to use multiple CPUs available in the con-
troller to compute and verify SMB2 security signature.
Enabling this feature may improve CIFS performance
when SMB2 protocol with security signature verifica-
tion is used. If this option is set to "default" the
feature is enabled or disabled depending on the Data
ONTAP version. The "cifs stat" command shows whether
SMB2 multiprocessor signing is enabled or disabled and
the system default value.
Default: default
Values: default, enabled, disabled
Effective: Immediately
Persistence: Remains in effect across system reboots