Mailinglist Archive: opensuse-kernel (59 mails)

[Greg KH <gregkh@xxxxxxx>]

On Sat, Jun 20, 2009 at 05:07:05PM -0400, Jeff Mahoney wrote:
> Greg KH wrote:
> > Hi all,
> >
> > I just now got the Moblin (2.6.29) kernel merged into the FACTORY
> > kernel, so it should start showing up in the next few builds.
>
> Cool. The majority of it looks like small fixes and adding the /dev stuff.

Yes.  There is also some wierd init call ordering that I'm not quite
sure why it's needed, but it speeds boot up, so I'm not complaining.

> > It really wasn't that many changes, the real work is in the
> > configurations.
> >
> > So, here's what I plan on doing, and it would be great to get some
> > feedback.
> >
> > For Moblin, we used a PAE kernel as "kernel-default".  For FACTORY, I
> > can't do that, and as we moved away from the -legacy to -default naming
> > scheme, I'll change the Moblin images to use kernel-pae.
> >
> > In the kernel-pae config, I'd like to start changing stuff to reflect
> > the fastboot things we did for Moblin.  In the end, we were booting the
> > kernel in less than a second on a tiny netbook, and I see no reason why
> > we can't do the same for FACTORY and all future releases.
> >
> > To achieve this, I'll start to change the i386/pae and x86-64/default
> > configurations to build a whole raft of drivers into the kernel, which
> > speeds up booting a _lot_ due to the async probing that it allows the
> > kernel to do.
>
> I'm still not a fan of this, but in the absence of the ability to link
> in modules at install time, I guess the gains outweigh the drawbacks.
>
> > I'll also disable a few things that PAE systems should never need (like
> > ISA), and a few other things that are in the Moblin kernel config.
>
> The PAE config already has CONFIG_ISA=n.

Ah, you're right, no wonder my diff didn't show it :)

> > In the end, this means that you can boot without an initrd at all,
> > but we need to move our init script changes over to FACTORY as well to
> > take full advantage of this.  There's also some mkinitrd magic I need to
> > figure out so that we don't accidentally create initrd when we don't
> > need them (which is a bug right now.)
>
> Did you figure out a way to discover when a module is built into the
> kernel instead of just unavailable?

No.

thanks,

greg k-h
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