Review D28062 of /usr/src/UPDATING with regard to upgrading FreeBSD and inconsistency with the FreeBSD Handbook

John Baldwin jhb at
Wed Apr 21 17:16:16 UTC 2021

On 4/18/21 1:48 AM, driesm.michiels at wrote:
>> If etcupdate -p fails before make installworld, then should the subsequent
>> etcupdate be with or without option -B ?
> -p and -B are not related.
> -p deals with changes needed for a correct run of installworld (see above).
> -B uses a freshly built world to speed up the tree comparison; although no
> flags work fine here as well, so -B is not necessarily required.

Technically -B speeds up generating the tree to compare against as it assumes
/usr/obj is up to date and uses that instead of rebuilding some files
generated by buildworld normally.  The actual tree comparison isn't affected.

John Baldwin

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