HEADS UP: caution required with updates using custom kernels
Erich Dollansky
erichsfreebsdlist at alogt.com
Mon Jun 27 13:30:31 UTC 2016
Hi,
On Thu, 23 Jun 2016 21:07:51 +0000
Brooks Davis <brooks at freebsd.org> wrote:
> Kernel config minimalists and those running aarch64 and riscv systems
> will want to head this UPDATING message.
>
> In practice, if you're fairly up to date, doing installworld before
> installkernel will also work (I've tested that case from ALPHA4), but
> is always somewhat risky.
>
there is another scenario in which you will use a word starting with an
f followed by three letters. I did a normal update, compiled a custom
kernel but did not re-compile my own application. As the application is
required for the start of the machine, I was left with a system which
could not be used. So, downgrading it, recompile the kernel with the
compatibility option, compile the program and then it should work again
is the way.
Erich
> -- Brooks
>
> ----- Forwarded message from Brooks Davis <brooks at FreeBSD.org> -----
>
> Date: Thu, 23 Jun 2016 21:02:05 +0000 (UTC)
> From: Brooks Davis <brooks at FreeBSD.org>
> To: src-committers at freebsd.org, svn-src-all at freebsd.org,
> svn-src-head at freebsd.org
> Subject: svn commit: r302152 - head
>
> Author: brooks
> Date: Thu Jun 23 21:02:05 2016
> New Revision: 302152
> URL: https://svnweb.freebsd.org/changeset/base/302152
>
> Log:
> Add an UPDATING entry for the pipe() -> pipe2() transition.
>
> Approved by: re (gjb)
> Sponsored by: DARPA, AFRL
>
> Modified:
> head/UPDATING
>
> Modified: head/UPDATING
> ==============================================================================
> --- head/UPDATING Thu Jun 23 20:59:13 2016 (r302151)
> +++ head/UPDATING Thu Jun 23 21:02:05 2016 (r302152)
> @@ -31,6 +31,14 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 11
> disable the most expensive debugging functionality run
> "ln -s 'abort:false,junk:false' /etc/malloc.conf".)
>
> +20160622:
> + The the libc stub for the pipe(2) system call has been
> replaced with
> + a wrapper which calls the pipe2(2) system call and the
> pipe(2) is now
> + only implemented by the kernels which include "options
> + FREEBSD10_COMPAT" in their config file (this is the default).
Shouldn't it read 'COMPAT_FREEBSD10'?
Erich
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