HEADS UP: caution required with updates using custom kernels

[O. Hartmann]

Am Thu, 23 Jun 2016 21:07:51 +0000
Brooks Davis <brooks at freebsd.org> schrieb:

> 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.
> 
> -- 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).
> +	Users should ensure that this option is enabled in their kernel
> +	or upgrade userspace to r302092 before upgrading their kernel.
> +
>  20160527:
>  	CAM will now strip leading spaces from SCSI disks' serial numbers.
>  	This will effect users who create UFS filesystems on SCSI disks using
> 
> 
> ----- End forwarded message -----

Is this showing up, when one doesn't have the expected COMPAT_FREEBSD10 in kernel and
updated kernel __before___ world?:

most recent CURRENT (FreeBSD 11.0-ALPHA4 #41 r302149: Thu Jun 23 21:58:25 CEST 2016
amd64, custom kernel) dies when trying to

make buildworld 

or

make buildkernel/kernel

with the message shown below:

root at localhost: [src] make buildkernel
*** Signal 12

Stop.
make: stopped in /usr/src
.ERROR_TARGET='buildkernel'
.ERROR_META_FILE=''
.MAKE.LEVEL='0'
MAKEFILE=''
.MAKE.MODE='normal'
.CURDIR='/usr/src'
.MAKE='make'
.OBJDIR='/usr/obj/usr/src'
.TARGETS='buildkernel'
DESTDIR=''
LD_LIBRARY_PATH=''
MACHINE='amd64'
MACHINE_ARCH='amd64'
MAKEOBJDIRPREFIX='/usr/obj'
MAKESYSPATH='/usr/src/share/mk'
MAKE_VERSION='20160606'
PATH='/sbin:/bin:/usr/sbin:/usr/bin'
SRCTOP='/usr/src'
OBJTOP='/usr/obj/usr/src'

Regards,

oh
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