rc.d script to load kernel modules
eirnym at gmail.com
Mon Jun 13 06:59:02 UTC 2011
On 13 June 2011 06:32, Garrett Cooper <yanegomi at gmail.com> wrote:
> On Sun, Jun 12, 2011 at 11:11 PM, Eir Nym <eirnym at gmail.com> wrote:
>> On 11 June 2011 22:17, Doug Barton <dougb at freebsd.org> wrote:
>>> Per discussion on -arch and the svn list about improving boot time and
>>> stripping down the kernel to just that-which-cannot-be-modularized I created
>>> the attached script to kldload modules that don't need to be in loader.conf.
>>> It cut quite a bit of time off my boot, so hopefully it will be useful to
>>> others as well.
>>> To use it just put everything that is being _load'ed in loader.conf into
>>> kld_list in rc.conf[.local]. For example, mine has:
>>> kld_list='umass coretemp ichwd linux nvidia if_wpi'
>>> If there is agreement that this is a good direction to go I'll be happy to
>>> commit this along with the relevant /etc/defaults/rc.conf and rc.conf.5
>> How do you would suggest set tunables, which are readonly or have no
>> sysctl(8) equivalent after boot-time? AFAIK loader can't set tunable
>> if module is not loaded at boot-time.
> Not true. Kernel tunables are really not that different (in
> concept) from kernel-level environment variables. Certainly, they
> would have less value if one's loading modules at boot (depending when
> things are done -- i.e. how closely the sysctl pseudo service is run
> to the proposed kld pseudo service), but sysctls can't be set until
> the module (or respective OID leaf) has been created by the kernel
> (somehow, i.e. via driver initialization, etc).
I use tunables and it will be great if I can add tunables for module
while load them from user space with rc(8).
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