22.10.2018 21:21, Andriy Gapon wrote: >>>>> Glen, maybe that errata record should be deleted. The problem is real but >>>>> it is long-standing >>>>> and present in 10.x too. >>>>> >>>> >>>> Could you elaborate more on the failure case you originally reported >>>> first? If the problem is real, my feeling is that the errata entry >>>> should stay, just worded differently to reflect the failure case here. >>> >>> zfs.ko depends on krpc.ko. The KRPC code in compiled in GENERIC kernel as >>> dependency >>> of NFS client/server code. The problem arises if all of these are true: >>> >>> 1) a system uses custom kernel with NFS options removed; >>> 2) there is no krpc.ko available due to MODULES_OVERRIDE excluding it; >>> 3) the system boots off ZFS pool. >>> >>> In such case, loader cannot resolve dependency and fails to load zfs.ko >>> and kernel fails to mount root breaking boot sequence. >>> >>> >> >> So, if I understand correctly (and please correct me if I am wrong), the >> majority of the text in the errata note is correct, however needs to be >> tweaked to remove "upgrading from 10.x...". Is this generally correct?
Yes. > This is just a typical foot-shooting (and a shortcoming of the kernel build > system that allows such foot-shooting to happen). > I think that there can be other ways in which you can specify inconsistent > kernel options and/or an incorrect subset of modules in MODULES_OVERRIDE to > create missing dependencies for critical modules. > Do we want to issue an errata for each possible misconfiguration? OTOH, we have option krpc in sys/conf/options but it is not mentioned elsewhere: not in the Handbook nor in the sys/conf/NOTES or GENERIC. Not a bit of our documentation mentions that ZFS requires KRPC for last 10 years. One can call it foot-shooting if it is against documentation but that's not the case. _______________________________________________ freebsd-stable@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
