[Buildroot] [Bug 2875] New: Kernel doesn't build Ext2 support out-of-the-box

[Buildroot] [Bug 2875] New: Kernel doesn't build Ext2 support out-of-the-box

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=2875

           Summary: Kernel doesn't build Ext2 support out-of-the-box
           Product: buildroot
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: critical
          Priority: P5
         Component: Other
        AssignedTo: unassigned at buildroot.uclibc.org
        ReportedBy: tuukka.pasanen at ilmi.fi
                CC: buildroot at uclibc.org
   Estimated Hours: 0.0


Because kernel doesn't build Ext2 support out-of-the-box if you choose i386 for
default config you can use iso-image without minor tuning of kernel .config
file. This should work like initrd thing.

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[Buildroot] [Bug 2875] Kernel doesn't build Ext2 support out-of-the-box

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=2875

--- Comment #1 from Thomas Petazzoni <thomas.petazzoni@free-electrons.com>  ---
Well, in general we only try to minimally interact with the kernel
configuration. For example, regardless of whether IPv6 is enabled or not at the
toolchain level, we do not enforce IPv6 configuration at the kernel level. Or
it's not because you have enabled the iptables package that we enforce
Netfilter configuration at the kernel level. I don't think Buildroot can
replace the embedded developer Linux brain and skills, it would involve too
much black magic.

Therefore, I'm tempted to say that we should live it as it is in the code. But
we could definitely improve the documentation.

I will not mark the bug as WONTFIX, waiting for other Buildroot developers to
comment.

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[Buildroot] [Bug 2875] Kernel doesn't build Ext2 support out-of-the-box

[Peter Korsgaard]

>>>>> "bugzilla" == bugzilla  <bugzilla@busybox.net> writes:

Hi,

 bugzilla> https://bugs.busybox.net/show_bug.cgi?id=2875 --- Comment #1
 bugzilla> from Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
 bugzilla> --- Well, in general we only try to minimally interact with
 bugzilla> the kernel configuration. For example, regardless of whether
 bugzilla> IPv6 is enabled or not at the toolchain level, we do not
 bugzilla> enforce IPv6 configuration at the kernel level.

I agree, but you're giving a bad example:

linux/linux.mk:
ifeq ($(BR2_INET_IPV6),y)
        $(call KCONFIG_ENABLE_OPT,CONFIG_IPV6,$(@D)/.config)
else
        $(call KCONFIG_DISABLE_OPT,CONFIG_IPV6,$(@D)/.config)
endif

Which comes from:

commit 100c09a53b8806b2281a93ad21744d26f68bcc6b
Author: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Date:   Tue Jun 8 13:56:19 2010 +0200

    linux: adjust kernel config according to the Buildroot configuration
    
    We only adjust the configuration or ARM EABI and IPv6. The (more
    complicated) initramfs case is handled in a separate commit. The user
    is expected to take care of all other configuration details (like
    having Netfilter enabled to make iptables work, etc.)
    
    Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

;)

 bugzilla> I will not mark the bug as WONTFIX, waiting for other
 bugzilla> Buildroot developers to comment.

I vote for WONTFIX.

-- 
Bye, Peter Korsgaard

[Buildroot] [Bug 2875] Kernel doesn't build Ext2 support out-of-the-box

[Thomas Petazzoni]

Hello,

On Wed, 22 Dec 2010 11:11:27 +0100
Peter Korsgaard <jacmet@uclibc.org> wrote:

> I agree, but you're giving a bad example:
> 
> linux/linux.mk:
> ifeq ($(BR2_INET_IPV6),y)
>         $(call KCONFIG_ENABLE_OPT,CONFIG_IPV6,$(@D)/.config)
> else
>         $(call KCONFIG_DISABLE_OPT,CONFIG_IPV6,$(@D)/.config)
> endif
> 
> Which comes from:
> 
> commit 100c09a53b8806b2281a93ad21744d26f68bcc6b
> Author: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
> Date:   Tue Jun 8 13:56:19 2010 +0200
> 
>     linux: adjust kernel config according to the Buildroot configuration
>     
>     We only adjust the configuration or ARM EABI and IPv6. The (more
>     complicated) initramfs case is handled in a separate commit. The user
>     is expected to take care of all other configuration details (like
>     having Netfilter enabled to make iptables work, etc.)
>     
>     Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
> 
> ;)

Notice that this commit was not *introducing* this, it was only
re-adding that feature into the new linux/linux.mk Makefile. See
http://git.buildroot.net/buildroot/tree/target/linux/Makefile.in.advanced?id=2010.05#n342 :-)

So, yes I'm contradicting myself, but not that much :-)

>  bugzilla> I will not mark the bug as WONTFIX, waiting for other
>  bugzilla> Buildroot developers to comment.
> 
> I vote for WONTFIX.

Ok. I think the IPv6 could also be removed (it's not because you have
an IPv6 capable toolchain that you necessarly want IPv6 in your kernel).
The EABI one is more or less justified, because we would otherwise have
hundreds of bug reports saying that userspace programs do not start.

Regards,

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com

[Buildroot] [Bug 2875] Kernel doesn't build Ext2 support out-of-the-box

[Peter Korsgaard]

>>>>> "Thomas" == Thomas Petazzoni <thomas.petazzoni@free-electrons.com> writes:

 >> I vote for WONTFIX.

 Thomas> Ok. I think the IPv6 could also be removed (it's not because you have
 Thomas> an IPv6 capable toolchain that you necessarly want IPv6 in your kernel).
 Thomas> The EABI one is more or less justified, because we would otherwise have
 Thomas> hundreds of bug reports saying that userspace programs do not start.

Agreed.

-- 
Bye, Peter Korsgaard

[Buildroot] [Bug 2875] Kernel doesn't build Ext2 support out-of-the-box

[Gustavo Zacarias]

On 12/22/10 07:43, Peter Korsgaard wrote:

>>>>>> "Thomas" == Thomas Petazzoni <thomas.petazzoni@free-electrons.com> writes:
> 
>  >> I vote for WONTFIX.
> 
>  Thomas> Ok. I think the IPv6 could also be removed (it's not because you have
>  Thomas> an IPv6 capable toolchain that you necessarly want IPv6 in your kernel).
>  Thomas> The EABI one is more or less justified, because we would otherwise have
>  Thomas> hundreds of bug reports saying that userspace programs do not start.
> 
> Agreed.

Also ext2 can be used by ext3 and ext4 in the kernel, so it would make
things far more complicated.

[Buildroot] [Bug 2875] Kernel doesn't build Ext2 support out-of-the-box

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=2875

Thomas Petazzoni <thomas.petazzoni@free-electrons.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |WONTFIX

--- Comment #2 from Thomas Petazzoni <thomas.petazzoni@free-electrons.com>  ---
See http://lists.busybox.net/pipermail/buildroot/2010-December/040028.html for
Peter Korsgaard opinion on this, which agrees with the WONTFIX proposal.

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