Re: 5.2.saving modules problem

Hi KP

Am 30.07.2015 um 15:51 schrieb kp kirchdoerfer:
> Hi Erich;
>
> Am Mittwoch, 29. Juli 2015, 10:01:42 schrieb Erich Titl:
>> Hi
>>
>> Am 25.07.2015 um 18:15 schrieb kp kirchdoerfer:
>> ...
>>
>>>> Ok, I'll try to add option to init/hwdetect util in some days. I think
>>>> that by default we shouldn't save probed modules to moddb.
>>>
>>> What about this one?
>>> Do you have time to add the code soon?
>>>
>>> I'd like to have it before we are doing another rc release for 5.2.
>>
>> To tellyou the truth, I don't like the idea of an option, it just adds
>> complexity and changes to the init process and that one is rotten enough
>> as it is now.
>>
>> I would like the current behaviour be kept as the default, new stuff can
>> be added as optional, thus users don't have to worry about the settings
>> of the boot process.
>>
>
> It depends what you define as "current behaviour".

Put it that way, no changes in boor config files, e.g. syslinux.conf or 
menu.lst (for grub)

>
> The current behaviour in 5.2-rc2 is that modules are probed from modules.sqfs
> during boot, copied to /lib/mdoules and loaded.
> This is extremly convenient if you have (boot) time and space.

OK current for me is not the _beta_ behaviour :-)

>
> Also updating a kernel requires to replace the kernel, initmod and
> modules.sqfs.

This one should _not_ be a dependency. At least to me that is a nice 
add_on but it must not be required to build a working system.

New dependencies will be resolved with next boot.
>
> The drawback is, that it is not possible to delete the 9MB modules.sqfs and
> that it always probe, copies and load modules.sqfs.

That is bad, it should not be this way.

>
> The idea is to have a parameter in leaf.cfg to save the probed modules to
> moddb, which is a lot smaller and to speed up boottime using moddb instead of
> moduels.sqfs. I believe this is inline with your arguments for small machines.

I don't like the idea to have additional parameters for something I 
don't like anyway :-(

>
> The code to save to and use moddb isn't really working yet, at least for me.
> But I think we should have that ready when releasing the next rc with
> modules.sqfs insteasd of modules.tgz.

To me it does not make a difference if it is a tgz file or sqfs, I won't 
use it anyway except for upgrade and then be done with it. I prefer 
moddb.lrp. I don't like the idea of a parameter because it adds complexity.

IMHO it should be

- load kernel and an absolute minimum of device drivers for the 
architecture, I _believe_ initmod is overcharged.
- load drivers as defined in moddb and /etc/modules
- if modules.sqfs exists, use it to load additional modules
- _don't_ touch the modules backup logic in any case

cheers

Erich

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