[gentoo-user] Inquiry about gentoo kernel configuration

[gentoo-user] Inquiry about gentoo kernel configuration

[Dongliang Mu]

Hi Gentoo users,

I am a newbie to Gentoo. For Debian, I can get configuration files
from Debian packages. I wonder if possible to get the kernel
configuration files of Gentoo.

If this question is invalid, please let me know.

[1] http://ftp.debian.org/debian/pool/main/l/linux/linux-config-5.10_5.10.46-1_amd64.deb

--
My best regards to you.

     No System Is Safe!
     Dongliang Mu

Re: [gentoo-user] Inquiry about gentoo kernel configuration

[Ramon Fischer]

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Hello Dongliang,

you could retrieve kernel configuration files from a "Minimal 
Installation CD"[1] of Gentoo. Mount it and look for "/boot/gentoo-config".

But I guess, you want a untouched version, don't you?

-Ramon

[1] https://www.gentoo.org/downloads/

On 10/07/2021 11:15, Dongliang Mu wrote:
> Hi Gentoo users,
>
> I am a newbie to Gentoo. For Debian, I can get configuration files
> from Debian packages. I wonder if possible to get the kernel
> configuration files of Gentoo.
>
> If this question is invalid, please let me know.
>
> [1] http://ftp.debian.org/debian/pool/main/l/linux/linux-config-5.10_5.10.46-1_amd64.deb
>
> --
> My best regards to you.
>
>       No System Is Safe!
>       Dongliang Mu
>

-- 
GPG public key: 5983 98DA 5F4D A464 38FD CF87 155B E264 13E6 99BF



[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 840 bytes --]

Re: [gentoo-user] Inquiry about gentoo kernel configuration

[William Kenworthy]

On 10/7/21 7:40 pm, Ramon Fischer wrote:
> Hello Dongliang,
>
> you could retrieve kernel configuration files from a "Minimal
> Installation CD"[1] of Gentoo. Mount it and look for
> "/boot/gentoo-config".
>
> But I guess, you want a untouched version, don't you?
>
> -Ramon

Hi, to expand on this - Gentoo doesn't really have a standardised kernel
config - the nearest to that is the above install CD, or the default
generic catchall "genkernel" one - most people seem to manually
configurate and tune/customise a .config and then copy it from system to
system.  There are a few bin(ary) kernels in portage/sys-kernel/* that
might work for you but I have never tried them.

You can boot almost any linux live media on your target hardware and
extract the config (sysrescuecd is a good one) and use their sources, or
build the kernel using their config on top of Gentoo's vanilla-sources,
or gentoo-sources.

Or grab another distros boot directory (containing the kernel, initrd
and config files), the matching /lib/modules directory and boot that
instead of building your own (I do this often on uboot based arm systems
and raspberry pi's.)

Or ask on the list if someone has a config that matches your target
(occasionally it comes up).

BillK




> [1] https://www.gentoo.org/downloads/
>
> On 10/07/2021 11:15, Dongliang Mu wrote:
>> Hi Gentoo users,
>>
>> I am a newbie to Gentoo. For Debian, I can get configuration files
>> from Debian packages. I wonder if possible to get the kernel
>> configuration files of Gentoo.
>>
>> If this question is invalid, please let me know.
>>
>> [1]
>> http://ftp.debian.org/debian/pool/main/l/linux/linux-config-5.10_5.10.46-1_amd64.deb
>>
>> -- 
>> My best regards to you.
>>
>>       No System Is Safe!
>>       Dongliang Mu
>>
>

Re: [gentoo-user] Inquiry about gentoo kernel configuration

[Ramon Fischer]

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In addition to this:

I did some further research about this, since I actually never thought 
about getting the Kernel sources without having an installed Gentoo system:

You may take a look at one of the HTTP mirrors[1], preferably one in 
your country and navigate to "/releases/<cpu_architecture>/". There you 
will find a Live DVD image - "livedvd-amd64-multilib-20160704.iso" for 
example - from which you could boot from; either virtually in VirtualBox 
or other virtualisation solutions or directly from hardware.

Click on "Login" to login and get the Kernel sources from 
"/usr/src/linux/.config".

-Ramon

[1] https://www.gentoo.org/downloads/mirrors/

On 10/07/2021 14:24, William Kenworthy wrote:
> On 10/7/21 7:40 pm, Ramon Fischer wrote:
>> Hello Dongliang,
>>
>> you could retrieve kernel configuration files from a "Minimal
>> Installation CD"[1] of Gentoo. Mount it and look for
>> "/boot/gentoo-config".
>>
>> But I guess, you want a untouched version, don't you?
>>
>> -Ramon
> Hi, to expand on this - Gentoo doesn't really have a standardised kernel
> config - the nearest to that is the above install CD, or the default
> generic catchall "genkernel" one - most people seem to manually
> configurate and tune/customise a .config and then copy it from system to
> system.  There are a few bin(ary) kernels in portage/sys-kernel/* that
> might work for you but I have never tried them.
>
> You can boot almost any linux live media on your target hardware and
> extract the config (sysrescuecd is a good one) and use their sources, or
> build the kernel using their config on top of Gentoo's vanilla-sources,
> or gentoo-sources.
>
> Or grab another distros boot directory (containing the kernel, initrd
> and config files), the matching /lib/modules directory and boot that
> instead of building your own (I do this often on uboot based arm systems
> and raspberry pi's.)
>
> Or ask on the list if someone has a config that matches your target
> (occasionally it comes up).
>
> BillK
>
>
>
>
>> [1] https://www.gentoo.org/downloads/
>>
>> On 10/07/2021 11:15, Dongliang Mu wrote:
>>> Hi Gentoo users,
>>>
>>> I am a newbie to Gentoo. For Debian, I can get configuration files
>>> from Debian packages. I wonder if possible to get the kernel
>>> configuration files of Gentoo.
>>>
>>> If this question is invalid, please let me know.
>>>
>>> [1]
>>> http://ftp.debian.org/debian/pool/main/l/linux/linux-config-5.10_5.10.46-1_amd64.deb
>>>
>>> -- 
>>> My best regards to you.
>>>
>>>        No System Is Safe!
>>>        Dongliang Mu
>>>

-- 
GPG public key: 5983 98DA 5F4D A464 38FD CF87 155B E264 13E6 99BF



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Re: [gentoo-user] Inquiry about gentoo kernel configuration

[Dongliang Mu]

On Sun, Jul 11, 2021 at 1:23 AM Ramon Fischer <Ramon_Fischer@hotmail.de> wrote:
>
> In addition to this:
>
> I did some further research about this, since I actually never thought
> about getting the Kernel sources without having an installed Gentoo system:
>
> You may take a look at one of the HTTP mirrors[1], preferably one in
> your country and navigate to "/releases/<cpu_architecture>/". There you
> will find a Live DVD image - "livedvd-amd64-multilib-20160704.iso" for
> example - from which you could boot from; either virtually in VirtualBox
> or other virtualisation solutions or directly from hardware.
>
> Click on "Login" to login and get the Kernel sources from
> "/usr/src/linux/.config".

Thanks for your effort. But it seems such livecd is not maintained
anymore. The latest version is 20170118 [1], right?

[1] http://mirrors.kernel.org/gentoo/releases/amd64/20170118/

>
> -Ramon
>
> [1] https://www.gentoo.org/downloads/mirrors/
>
> On 10/07/2021 14:24, William Kenworthy wrote:
> > On 10/7/21 7:40 pm, Ramon Fischer wrote:
> >> Hello Dongliang,
> >>
> >> you could retrieve kernel configuration files from a "Minimal
> >> Installation CD"[1] of Gentoo. Mount it and look for
> >> "/boot/gentoo-config".
> >>
> >> But I guess, you want a untouched version, don't you?
> >>
> >> -Ramon
> > Hi, to expand on this - Gentoo doesn't really have a standardised kernel
> > config - the nearest to that is the above install CD, or the default
> > generic catchall "genkernel" one - most people seem to manually
> > configurate and tune/customise a .config and then copy it from system to
> > system.  There are a few bin(ary) kernels in portage/sys-kernel/* that
> > might work for you but I have never tried them.
> >
> > You can boot almost any linux live media on your target hardware and
> > extract the config (sysrescuecd is a good one) and use their sources, or
> > build the kernel using their config on top of Gentoo's vanilla-sources,
> > or gentoo-sources.
> >
> > Or grab another distros boot directory (containing the kernel, initrd
> > and config files), the matching /lib/modules directory and boot that
> > instead of building your own (I do this often on uboot based arm systems
> > and raspberry pi's.)
> >
> > Or ask on the list if someone has a config that matches your target
> > (occasionally it comes up).
> >
> > BillK
> >
> >
> >
> >
> >> [1] https://www.gentoo.org/downloads/
> >>
> >> On 10/07/2021 11:15, Dongliang Mu wrote:
> >>> Hi Gentoo users,
> >>>
> >>> I am a newbie to Gentoo. For Debian, I can get configuration files
> >>> from Debian packages. I wonder if possible to get the kernel
> >>> configuration files of Gentoo.
> >>>
> >>> If this question is invalid, please let me know.
> >>>
> >>> [1]
> >>> http://ftp.debian.org/debian/pool/main/l/linux/linux-config-5.10_5.10.46-1_amd64.deb
> >>>
> >>> --
> >>> My best regards to you.
> >>>
> >>>        No System Is Safe!
> >>>        Dongliang Mu
> >>>
>
> --
> GPG public key: 5983 98DA 5F4D A464 38FD CF87 155B E264 13E6 99BF
>
>

Re: [gentoo-user] Inquiry about gentoo kernel configuration

[Ramon Fischer]

[-- Attachment #1.1: Type: text/plain, Size: 3867 bytes --]

Yes, but the image does not need to be up-to-date, since you only use it 
temporarily; everything else is done in a chroot environment. One thing 
to mention, though: The LiveDVD can be booted from UEFI, which you will 
need to finalise[2] the Gentoo installation on a UEFI system.

As William already mentioned, you can boot from almost any Linux live 
media and install Gentoo[1] from there.

-Ramon

[1] https://wiki.gentoo.org/wiki/Handbook:AMD64/Full/Installation
[2] See important note: 
https://wiki.gentoo.org/wiki/Handbook:AMD64/Full/Installation#Booting_the_installation_media

On 11/07/2021 15:11, Dongliang Mu wrote:
> On Sun, Jul 11, 2021 at 1:23 AM Ramon Fischer <Ramon_Fischer@hotmail.de> wrote:
>> In addition to this:
>>
>> I did some further research about this, since I actually never thought
>> about getting the Kernel sources without having an installed Gentoo system:
>>
>> You may take a look at one of the HTTP mirrors[1], preferably one in
>> your country and navigate to "/releases/<cpu_architecture>/". There you
>> will find a Live DVD image - "livedvd-amd64-multilib-20160704.iso" for
>> example - from which you could boot from; either virtually in VirtualBox
>> or other virtualisation solutions or directly from hardware.
>>
>> Click on "Login" to login and get the Kernel sources from
>> "/usr/src/linux/.config".
> Thanks for your effort. But it seems such livecd is not maintained
> anymore. The latest version is 20170118 [1], right?
>
> [1] http://mirrors.kernel.org/gentoo/releases/amd64/20170118/
>
>> -Ramon
>>
>> [1] https://www.gentoo.org/downloads/mirrors/
>>
>> On 10/07/2021 14:24, William Kenworthy wrote:
>>> On 10/7/21 7:40 pm, Ramon Fischer wrote:
>>>> Hello Dongliang,
>>>>
>>>> you could retrieve kernel configuration files from a "Minimal
>>>> Installation CD"[1] of Gentoo. Mount it and look for
>>>> "/boot/gentoo-config".
>>>>
>>>> But I guess, you want a untouched version, don't you?
>>>>
>>>> -Ramon
>>> Hi, to expand on this - Gentoo doesn't really have a standardised kernel
>>> config - the nearest to that is the above install CD, or the default
>>> generic catchall "genkernel" one - most people seem to manually
>>> configurate and tune/customise a .config and then copy it from system to
>>> system.  There are a few bin(ary) kernels in portage/sys-kernel/* that
>>> might work for you but I have never tried them.
>>>
>>> You can boot almost any linux live media on your target hardware and
>>> extract the config (sysrescuecd is a good one) and use their sources, or
>>> build the kernel using their config on top of Gentoo's vanilla-sources,
>>> or gentoo-sources.
>>>
>>> Or grab another distros boot directory (containing the kernel, initrd
>>> and config files), the matching /lib/modules directory and boot that
>>> instead of building your own (I do this often on uboot based arm systems
>>> and raspberry pi's.)
>>>
>>> Or ask on the list if someone has a config that matches your target
>>> (occasionally it comes up).
>>>
>>> BillK
>>>
>>>
>>>
>>>
>>>> [1] https://www.gentoo.org/downloads/
>>>>
>>>> On 10/07/2021 11:15, Dongliang Mu wrote:
>>>>> Hi Gentoo users,
>>>>>
>>>>> I am a newbie to Gentoo. For Debian, I can get configuration files
>>>>> from Debian packages. I wonder if possible to get the kernel
>>>>> configuration files of Gentoo.
>>>>>
>>>>> If this question is invalid, please let me know.
>>>>>
>>>>> [1]
>>>>> http://ftp.debian.org/debian/pool/main/l/linux/linux-config-5.10_5.10.46-1_amd64.deb
>>>>>
>>>>> --
>>>>> My best regards to you.
>>>>>
>>>>>         No System Is Safe!
>>>>>         Dongliang Mu
>>>>>
>> --
>> GPG public key: 5983 98DA 5F4D A464 38FD CF87 155B E264 13E6 99BF
>>
>>

-- 
GPG public key: 5983 98DA 5F4D A464 38FD CF87 155B E264 13E6 99BF



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[-- Type: application/pgp-signature, Size: 840 bytes --]

Re: [gentoo-user] Inquiry about gentoo kernel configuration

[Dongliang Mu]

On Sat, Jul 10, 2021 at 8:26 PM William Kenworthy <billk@iinet.net.au> wrote:
>
>
> On 10/7/21 7:40 pm, Ramon Fischer wrote:
> > Hello Dongliang,
> >
> > you could retrieve kernel configuration files from a "Minimal
> > Installation CD"[1] of Gentoo. Mount it and look for
> > "/boot/gentoo-config".
> >
> > But I guess, you want a untouched version, don't you?
> >
> > -Ramon
>
> Hi, to expand on this - Gentoo doesn't really have a standardised kernel
> config - the nearest to that is the above install CD, or the default
> generic catchall "genkernel" one - most people seem to manually
> configurate and tune/customise a .config and then copy it from system to
> system.  There are a few bin(ary) kernels in portage/sys-kernel/* that
> might work for you but I have never tried them.

I see, thanks for your explanation. Gentoo people seem to build
everything for their systems, including the underlying Linux kernel.

For the installation CD, it plays a role as a temporary system to
install the real Gentoo Linux.

So there should be no default kernel configuration files. It depends
on the Gentoo user, right?

>
> You can boot almost any linux live media on your target hardware and
> extract the config (sysrescuecd is a good one) and use their sources, or
> build the kernel using their config on top of Gentoo's vanilla-sources,
> or gentoo-sources.
>
> Or grab another distros boot directory (containing the kernel, initrd
> and config files), the matching /lib/modules directory and boot that
> instead of building your own (I do this often on uboot based arm systems
> and raspberry pi's.)
>
> Or ask on the list if someone has a config that matches your target
> (occasionally it comes up).
>
> BillK
>
>
>
>
> > [1] https://www.gentoo.org/downloads/
> >
> > On 10/07/2021 11:15, Dongliang Mu wrote:
> >> Hi Gentoo users,
> >>
> >> I am a newbie to Gentoo. For Debian, I can get configuration files
> >> from Debian packages. I wonder if possible to get the kernel
> >> configuration files of Gentoo.
> >>
> >> If this question is invalid, please let me know.
> >>
> >> [1]
> >> http://ftp.debian.org/debian/pool/main/l/linux/linux-config-5.10_5.10.46-1_amd64.deb
> >>
> >> --
> >> My best regards to you.
> >>
> >>       No System Is Safe!
> >>       Dongliang Mu
> >>
> >
>

Re: [gentoo-user] Inquiry about gentoo kernel configuration

[Mark Knecht]

[-- Attachment #1: Type: text/plain, Size: 583 bytes --]

On Sat, Jul 10, 2021 at 2:16 AM Dongliang Mu <mudongliangabcd@gmail.com>
wrote:
>
> Hi Gentoo users,
>
> I am a newbie to Gentoo. For Debian, I can get configuration files
> from Debian packages. I wonder if possible to get the kernel
> configuration files of Gentoo.
>
> If this question is invalid, please let me know.
>
> [1]
http://ftp.debian.org/debian/pool/main/l/linux/linux-config-5.10_5.10.46-1_amd64.deb
>
> --
> My best regards to you.
>
>      No System Is Safe!
>      Dongliang Mu

If the feature is enabled in the kernel you have running then

zcat /proc/config.gz

?

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[gentoo-user] Re: Inquiry about gentoo kernel configuration

[Nikos Chantziaras]

On 10/07/2021 12:15, Dongliang Mu wrote:
> Hi Gentoo users,
> 
> I am a newbie to Gentoo. For Debian, I can get configuration files
> from Debian packages. I wonder if possible to get the kernel
> configuration files of Gentoo.

You can use the one shipped in the sys-kernel/gentoo-kernel-bin package.

Re: [gentoo-user] Re: Inquiry about gentoo kernel configuration

[Dongliang Mu]

On Sun, Jul 11, 2021 at 1:54 AM Nikos Chantziaras <realnc@gmail.com> wrote:
>
> On 10/07/2021 12:15, Dongliang Mu wrote:
> > Hi Gentoo users,
> >
> > I am a newbie to Gentoo. For Debian, I can get configuration files
> > from Debian packages. I wonder if possible to get the kernel
> > configuration files of Gentoo.
>
> You can use the one shipped in the sys-kernel/gentoo-kernel-bin package.
>

Thanks. There is only a file - *.ebuild file in this package. From the
package, I did not find out what .config file it uses. It seems this
script uses the config file of current system.

>

Re: [gentoo-user] Re: Inquiry about gentoo kernel configuration

[Nils Freydank]

Am Sonntag, den 11.07.2021 um 21:17:50 Uhr +0800 schrieb Dongliang Mu <mudongliangabcd@gmail.com>:
> [...]
> Thanks. There is only a file - *.ebuild file in this package. From the
> package, I did not find out what .config file it uses. It seems this
> script uses the config file of current system.

Hi,

look here: https://github.com/mgorny/gentoo-kernel-config

In names of gentoo "packages" the -bin suffix indicates that it is a pre-built,
binary package, so the maintainers use a configuration, build the kernel
and upload everything as a binary package. Portage than installs the binary
package when you would call 'emerge --ask gentoo-kernel-bin'.

Some hints for reading ebuilds and finding stuff:

The ebuilds are basically bash scripts, and to find functions called inside each
ebuild you can search in the eclasses dir in
https://gitweb.gentoo.org/repo/gentoo.git/tree/eclass
while you can find (most) of the eclass names from the line starting with
'inherit'.

To find e.g. the link to the config I used the following workflow. Maybe it'll
be of usage for you, too:
https://packages.gentoo.org -> gentoo-kernel -> Git repository browser
  -> choose the package version -> link below:
https://gitweb.gentoo.org/repo/gentoo.git/tree/sys-kernel/gentoo-kernel/gentoo-kernel-5.12.15.ebuild#n20

Kind regards,
Nils

Re: [gentoo-user] Re: Inquiry about gentoo kernel configuration

[Hayley]

On Sun, 2021-07-11 at 21:17 +0800, Dongliang Mu wrote:
> On Sun, Jul 11, 2021 at 1:54 AM Nikos Chantziaras <realnc@gmail.com>
> wrote:
> > 
> > On 10/07/2021 12:15, Dongliang Mu wrote:
> > > Hi Gentoo users,
> > > 
> > > I am a newbie to Gentoo. For Debian, I can get configuration
> > > files
> > > from Debian packages. I wonder if possible to get the kernel
> > > configuration files of Gentoo.
> > 
> > You can use the one shipped in the sys-kernel/gentoo-kernel-bin
> > package.
> > 
> 
> Thanks. There is only a file - *.ebuild file in this package. From
> the
> package, I did not find out what .config file it uses. It seems this
> script uses the config file of current system.
> 
> > 
> 

sys-kernel/gentoo-kernel/gentoo-kernel-5.10.38.ebuild suggests that
gentoo-kernel-bin is based off of fedora's kernel config.

Hayley

[gentoo-user] Re: Inquiry about gentoo kernel configuration

[Nikos Chantziaras]

On 11/07/2021 16:17, Dongliang Mu wrote:
> On Sun, Jul 11, 2021 at 1:54 AM Nikos Chantziaras <realnc@gmail.com> wrote:
>> On 10/07/2021 12:15, Dongliang Mu wrote:
>>> I am a newbie to Gentoo. For Debian, I can get configuration files
>>> from Debian packages. I wonder if possible to get the kernel
>>> configuration files of Gentoo.
>>
>> You can use the one shipped in the sys-kernel/gentoo-kernel-bin package.
> 
> Thanks. There is only a file - *.ebuild file in this package. From the
> package, I did not find out what .config file it uses. It seems this
> script uses the config file of current system.

It ships its own .config. The easiest way here is to simply install 
gentoo-kernel-bin. After you get a system running that kernel, build 
your own, basing your new config on the existing one.

[gentoo-user] Re: Inquiry about gentoo kernel configuration

[Grant Edwards]

On 2021-07-13, Nikos Chantziaras <realnc@gmail.com> wrote:

>>> You can use the one shipped in the sys-kernel/gentoo-kernel-bin package.
>> 
>> Thanks. There is only a file - *.ebuild file in this package. From the
>> package, I did not find out what .config file it uses. It seems this
>> script uses the config file of current system.
>
> It ships its own .config. The easiest way here is to simply install 
> gentoo-kernel-bin. After you get a system running that kernel, build 
> your own, basing your new config on the existing one.

But remember: real Gentooers don't use modules or initrds.

;)

-- 
Grant Edwards               grant.b.edwards        Yow! Oh my GOD -- the
                                  at               SUN just fell into YANKEE
                              gmail.com            STADIUM!!