Date: Fri, 8 Mar 2019 18:53:55 +0000 (UTC) From: John Baldwin <jhb@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r344927 - in stable: 11 12 Message-ID: <201903081853.x28IrtaD058154@repo.freebsd.org>
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Author: jhb Date: Fri Mar 8 18:53:54 2019 New Revision: 344927 URL: https://svnweb.freebsd.org/changeset/base/344927 Log: MFC 343048: Update the note about the need for COMPAT_FREEBSD<n> kernel options. Rather than mentioning the requirement for 4.x binaries but not explaining why (it was assuming an upgrade from 4.x to 5.0-current), explain when compat options are needed (for running existing host binaries) in a more general way while using a more modern example (COMPAT_FREEBSD11 for 11.x binaries). While here, explicitly mention that a GENERIC kernel should always work. Modified: stable/12/UPDATING Directory Properties: stable/12/ (props changed) Changes in other areas also in this revision: Modified: stable/11/UPDATING Directory Properties: stable/11/ (props changed) Modified: stable/12/UPDATING ============================================================================== --- stable/12/UPDATING Fri Mar 8 18:49:27 2019 (r344926) +++ stable/12/UPDATING Fri Mar 8 18:53:54 2019 (r344927) @@ -1867,12 +1867,13 @@ COMMON ITEMS: can be deleted by "make delete-old-libs", but you have to make sure that no program is using those libraries anymore. - [8] In order to have a kernel that can run the 4.x binaries needed to - do an installworld, you must include the COMPAT_FREEBSD4 option in - your kernel. Failure to do so may leave you with a system that is - hard to boot to recover. A similar kernel option COMPAT_FREEBSD5 is - required to run the 5.x binaries on more recent kernels. And so on - for COMPAT_FREEBSD6 and COMPAT_FREEBSD7. + [8] The new kernel must be able to run existing binaries used by + an installworld. When upgrading across major versions, the new + kernel's configuration must include the correct COMPAT_FREEBSD<n> + option for existing binaries (e.g. COMPAT_FREEBSD11 to run 11.x + binaries). Failure to do so may leave you with a system that is + hard to boot to recover. A GENERIC kernel will include suitable + compatibility options to run binaries from older branches. Make sure that you merge any new devices from GENERIC since the last time you updated your kernel config file.
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