> AFAIK you are the only official distribution that uses 4.13 for zfcpdump - therefore IMHO this should be sufficient.
That is not true. We do not use v4.13 kernel for zfcpdump-kernel package. zfcpdump-kernel package is based on v4.9 and upgrading that to v4.10+ fails to perform any dumps at all.
> AFAIK you are the only official distribution that uses 4.13 for zfcpdump - therefore IMHO this should be sufficient.
That is not true. We do not use v4.13 kernel for zfcpdump-kernel package. zfcpdump-kernel package is based on v4.9 and upgrading that to v4.10+ fails to perform any dumps at all.
Please see https:/ /bugs.launchpad .net/ubuntu/ +source/ zfcpdump- kernel/ +bug/1722735 which has been requested for reverse-proxy.
Why was debugfs disabled upstream? Especially since s390-tools explicitly tries to mount debugfs.