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Date:      Fri, 30 Nov 2012 11:25:13 +0100
From:      Fleuriot Damien <ml@my.gd>
To:        Alfred Bartsch <bartsch@dssgmbh.de>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: How to clean up /
Message-ID:  <129391C5-DBD1-4E14-9834-0CEC8713C05E@my.gd>
In-Reply-To: <50B8758C.2070202@dssgmbh.de>
References:  <A802184434754A128800ECE0A900127B@CMOTUM25PC> <1354239860.19647.8.camel@eva02> <2A4F276A-B95D-4D03-86F4-0A7C5A06B9A9@gsoft.com.au> <CAN6yY1uwcUJi3Y4O=gJvf-e5obkgvzV3nn8HoCF54r0KvEzc9w@mail.gmail.com> <50B8758C.2070202@dssgmbh.de>

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On Nov 30, 2012, at 9:59 AM, Alfred Bartsch <bartsch@dssgmbh.de> wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>=20
> Am 30.11.2012 08:16, schrieb Kevin Oberman:
>> On Thu, Nov 29, 2012 at 8:46 PM, Daniel O'Connor
>> <doconnor@gsoft.com.au> wrote:
>>>=20
>>> On 30/11/2012, at 12:14, mbsd <mbsd@isgroup.com.ua> wrote:
>>>> =CE=9E ~ =E2=86=92 du -sh /boot/kernel 59M   kernel
>>>>=20
>>>> Try to recompile your kernel without debug.
>>>=20
>>> Or delete /boot/kernel/*.symbols.
>=20
> You may suppress the installation of the *.symbols files by inserting
> the following statement into /etc/make.conf:
>=20
> # prevent installation of "*.symbols" in /boot/kernel
> INSTALL_NODEBUG=3D        yes


In addition to the previous advice you've received regarding symbol =
files, you may also want to only compile and install the kernel modules =
you actually use.
There's also the side benefit of the kernel being that much faster to =
rebuild.

Get the list with "kldstat".

Here for example, we only build a very few of them:
$ kldstat
Id Refs Address            Size     Name
 1   19 0xffffffff80100000 b0eec0   kernel
 2    1 0xffffffff80c0f000 bca8     geom_label.ko
 3    1 0xffffffff80c1b000 1350     mfi_linux.ko
 4    4 0xffffffff80c1d000 47958    linux.ko
 5    1 0xffffffff80e12000 40c3     linprocfs.ko
 6    1 0xffffffff80e17000 a14      linsysfs.ko


This yields a very lightweight kernel folder, even when retaining the =
debug symbols:
$ du -hs
 46M	.

This is what you want in /etc/rc.conf :
MODULES_OVERRIDE=3Dgeom/geom_label if_lagg if_vlan linprocfs linsysfs =
linux mfi/mfi_linux




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