https://www.ibm.com/docs/en/linux-on-systems?topic=messages-af-iucv
af_iucv
Messages with a prefix af_iucv are issued by the kernel module that supports the AF_IUCV address family for communication and addressing with z/VM IUCV.
afiucv
https://lkml.org/lkml/2023/12/20/320
LKML: Greg Kroah-Hartman: [PATCH v2] iucv: make iucv_bus const
greg kroah hartmanlkmlpatchv2iucv
https://lkml.org/lkml/2020/12/6/264
LKML: Greg Kroah-Hartman: [PATCH 4.19 02/32] net/af_iucv: set correct sk_protocol for child sockets
https://www.ibm.com/docs/en/linux-on-systems?topic=driver-what-you-should-know-about-iucv
What you should know about IUCV
The NETIUCV device driver assigns IUCV interface names and creates IUCV devices in sysfs.
what you should knowiucv