[Bug 252554] dumpon doesn't work with -z or -Z options?

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Sun Jan 10 18:21:02 UTC 2021


https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=252554

--- Comment #2 from Mark Johnston <markj at FreeBSD.org> ---
Hidden in the CAVEATS section of the man page we have:

-Z requires a kernel compiled with the ZSTDIO kernel option.

so my first question is whether your kernel indeed has these options.  "sysctl
kern.conftxt | grep ZSTDIO" should tell you.  FreeBSD GENERIC has them but if
this is HardenedBSD (how do we know?) then presumably there is some custom
config.

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