Re: [gentoo-user] Re: How to run 2.6.25 kernel (no DEVTMPFS)?

[J. Roeleveld]

On 14 February 2014 22:31:54 CET, Grant Edwards <grant.b.edwards@×××××.com> wrote:
>On 2014-02-14, Mike Gilbert <floppym@g.o> wrote:
>> On Fri, Feb 14, 2014 at 4:12 PM, Grant Edwards
>><grant.b.edwards@×××××.com> wrote:
>>> I need to do some testing with kernels as far back as 2.6.25.  I've
>>> currently got a Gentoo box that can build and run kernels ranging
>from
>>> 3.14.rc2 to 2.6.32. There are various gcc and make issues which have
>>> been successfully dealt with, but now I'm stuck on DEVTMPFS.
>>>
>>> Prior to 2.6.32 DEVTMPFS isn't available, so even though I can build
>>> and boot a 2.6.25 kernel, udev craps out.
>>>
>>> There are plenty of spare paritions to play with, so doing a Linux
>>> install to test with kernels older than 2.6.32 is no problem.
>>>
>>> I'm wondering if instead of downloading an old Ubuntu or Fedora DVD,
>>> is there any way to install an "old" version of Gentoo that will
>work
>>> with pre-DEVTMPFS kernels?
>>
>> Do you actually need udev?
>
>Good question -- I probably don't.  For the testing in question I
>should be able to live with a static /dev directory.  Is there any
>documentation on doing a Gentoo install without udev?
>
>> If you can get away with just having a static /dev with pre-created
>> device nodes, that would be the simplest solution.
>
>It would probably be asking for too much to try to toggle between udev
>and static /dev at boot time in a single installation...

Not aware of documentation.
Mkdev would be a good start for google.

To toggle at boottime, use different runlevels.

1 that mounts tmpfs over /dev and starts udev.
Another that doesn't.

And /dev contains static device nodes.

--
Joost
-- 
Sent from my Android device with K-9 Mail. Please excuse my brevity.