Date: Wed, 7 Jul 2010 23:30:14 +0100 From: "Steven Hartland" <killing@multiplay.co.uk> To: "Randi Harper" <randi@freebsd.org>, "Mikhail T." <mi+thun@aldan.algebra.com> Cc: tom@hur.st, freebsd-stable@freebsd.org, Jeremy Chadwick <freebsd@jdc.parodius.com>, freebsd-usb@freebsd.org Subject: Re: 8.x grudges Message-ID: <55392D10B7BA4A3E85835F5B2BBD143B@multiplay.co.uk> References: <4C34C5DE.7040007@aldan.algebra.com><20100707185928.GA16180@icarus.home.lan><4C34E0E6.9070801@aldan.algebra.com><AANLkTimdSWkgOYaSp-sWVd2fHtjv65zEVCJIT6mHlNC5@mail.gmail.com><4C34E910.5020007@aldan.algebra.com> <AANLkTikVCqs_npfcorthKUqhN8vDYTDB0cPZOJGaJqzi@mail.gmail.com>
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For what its worth, we have had good success migrating our kernel configs
from 6 -> 7 -> 8 with very few changes, and no real problems.
The secret is to create a kernel that is based of GENERIC using include
in a "clean" the include that config in top level one which adds the specific
additional options you want.
It doesn't remove the requirement to check for changes between the versions
and act appropriately but it does make this process as simple as diffing
the two GENERIC configs and updating our clean and addition configs with
the few changes needed.
This structure also means kernels compile really quickly :)
e.g.
[MULTIPLAY]
include MULTIPLAY_CLEAN
ident MULTIPLAY
makeoptions MODULES_OVERRIDE="linux linprocfs acpi nullfs unionfs accf_http if_lagg"
options PRINTF_BUFR_SIZE=128 # Fix scrambled output on console
options COMPAT_LINUX32
options INCLUDE_CONFIG_FILE
options DEVICE_POLLING
[/MULTIPLAY]
[MULTIPLAY_CLEAN]
include GENERIC
nooptions INET6
nooptions SCTP
nooptions NFS_ROOT
nooptions NTFS
nooptions MSDOSFS
# SCSI Controllers
nodevice ahc
...
[/MULTIPLAY_CLEAN]
Hope this helps.
Regards
Steve
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