GNU bug report logs - #20757
"unable to fork" on armhf

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Efraim Flashner <efraim <at> flashner.co.il>
To: bug-guix <at> gnu.org
Subject: "unable to fork" on armhf
Date: Sun, 7 Jun 2015 11:41:47 +0300

[Message part 1 (text/plain, inline)]

I have an armhf marsboard that I'm trying to run guix on top of debian. I
started by flashing a debian wheezy image, stripping out most of the
packages, and upgrading to jessie. I installed using the 0.8.2 armhf binary.
`guix pull` failed with the error "unable to fork: Invalid argument", and
likewise `guix build hello` also failed.

I ran `sudo strace -o log /root/.guix-profile/bin/guix-daemon
--build-users-group=guix-builder &`  and `strace -o hello guix build hello`.
I've attached the guix-daemon log to the email and the hello log is at
https://flashner.co.il/~efraim/hello

uname -a:
Linux marsboard 3.0.36+ #67 SMP PREEMPT Sat Dec 13 10:01:50 HKT 2014 armv7l
GNU/Linux

ldd --version:
ldd (Debian GLIBC 2.19-18) 2.19

cat /proc/cpuinfo:
Processor	: ARMv7 Processor rev 0 (v7l)
processor	: 0
BogoMIPS	: 503.83

processor	: 1
BogoMIPS	: 503.83

Features	: swp falf thumb fastmult vfp edsp neon vfpv3
CPU implementer	: 0x41
CPU architecture: 7
CPU variant	: 0x3
CPU part	: 0xc09
CPU revision	: 0

Hardware	: RK30board
Revision	: 0000
Serial		: 0000000000000000

-- 
Efraim Flashner   <efraim <at> flashner.co.il>   אפרים פלשנר
GPG key = A28B F40C 3E55 1372 662D  14F7 41AA E7DC CA3D 8351
Confidentiality cannot be guaranteed on emails sent or received unencrypted

[log (application/octet-stream, attachment)]

[Message part 3 (application/pgp-signature, inline)]

Message #8 received at 20757 <at> debbugs.gnu.org (full text, mbox):

From: ludo <at> gnu.org (Ludovic Courtès)
To: Efraim Flashner <efraim <at> flashner.co.il>
Cc: 20757 <at> debbugs.gnu.org
Subject: Re: bug#20757: "unable to fork" on armhf
Date: Sun, 07 Jun 2015 21:44:08 +0200

Efraim Flashner <efraim <at> flashner.co.il> skribis:

> I have an armhf marsboard that I'm trying to run guix on top of debian. I
> started by flashing a debian wheezy image, stripping out most of the
> packages, and upgrading to jessie. I installed using the 0.8.2 armhf binary.
> `guix pull` failed with the error "unable to fork: Invalid argument", and
> likewise `guix build hello` also failed.
>
> I ran `sudo strace -o log /root/.guix-profile/bin/guix-daemon
> --build-users-group=guix-builder &`

Could you add -f so that child processes are traced?

  sudo strace -f -o log /root/.guix-profile/bin/guix-daemon \
     --build-users-group=guix-builder &

The main process doesn’t do the interesting bits.

TIA!

Ludo’.

Message #11 received at 20757 <at> debbugs.gnu.org (full text, mbox):

From: Mark H Weaver <mhw <at> netris.org>
To: Efraim Flashner <efraim <at> flashner.co.il>
Cc: 20757 <at> debbugs.gnu.org
Subject: Re: bug#20757: "unable to fork" on armhf
Date: Sun, 07 Jun 2015 17:46:18 -0400

Efraim Flashner <efraim <at> flashner.co.il> writes:

> I have an armhf marsboard that I'm trying to run guix on top of debian. I
> started by flashing a debian wheezy image, stripping out most of the
> packages, and upgrading to jessie. I installed using the 0.8.2 armhf binary.
> `guix pull` failed with the error "unable to fork: Invalid argument", and
> likewise `guix build hello` also failed.

This is probably because your kernel lacks the necessary features to
create the build containers needed by guix-daemon.  The above error is
printed if the 'clone' system call fails when invoked with the following
flags:

  CLONE_NEWPID | CLONE_NEWNS | CLONE_NEWIPC | CLONE_NEWUTS

You need PID namespaces, private mount namespaces, private network
namespaces, IPC namespaces, and UTS namespaces.  You will also need
CONFIG_DEVPTS_MULTIPLE_INSTANCES.

We should document this better, but I guess you need at least the
following options enabled in your kernel build-time configuration:

CONFIG_NAMESPACES=y
CONFIG_UTS_NS=y
CONFIG_IPC_NS=y
CONFIG_USER_NS=y
CONFIG_PID_NS=y
CONFIG_NET_NS=y
CONFIG_DEVPTS_MULTIPLE_INSTANCES=y

     Mark

Message #14 received at 20757 <at> debbugs.gnu.org (full text, mbox):

From: Efraim Flashner <efraim <at> flashner.co.il>
To: ludo <at> gnu.org (Ludovic Courtès)
Cc: 20757 <at> debbugs.gnu.org
Subject: Re: bug#20757: "unable to fork" on armhf
Date: Mon, 8 Jun 2015 10:17:01 +0300

[Message part 1 (text/plain, inline)]

On Sun, 07 Jun 2015 21:44:08 +0200
ludo <at> gnu.org (Ludovic Courtès) wrote:

> Efraim Flashner <efraim <at> flashner.co.il> skribis:
> 
> > I have an armhf marsboard that I'm trying to run guix on top of debian. I
> > started by flashing a debian wheezy image, stripping out most of the
> > packages, and upgrading to jessie. I installed using the 0.8.2 armhf
> > binary. `guix pull` failed with the error "unable to fork: Invalid
> > argument", and likewise `guix build hello` also failed.
> >
> > I ran `sudo strace -o log /root/.guix-profile/bin/guix-daemon
> > --build-users-group=guix-builder &`
> 
> Could you add -f so that child processes are traced?
> 
>   sudo strace -f -o log /root/.guix-profile/bin/guix-daemon \
>      --build-users-group=guix-builder &

the log file came out a bit big, so I've hosted it here:
https://flashner.co.il/~efraim/log

> The main process doesn’t do the interesting bits.
> 
> TIA!
> 
> Ludo’.



-- 
Efraim Flashner   <efraim <at> flashner.co.il>   אפרים פלשנר
GPG key = A28B F40C 3E55 1372 662D  14F7 41AA E7DC CA3D 8351
Confidentiality cannot be guaranteed on emails sent or received unencrypted

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Message #17 received at 20757 <at> debbugs.gnu.org (full text, mbox):

From: ludo <at> gnu.org (Ludovic Courtès)
To: Efraim Flashner <efraim <at> flashner.co.il>
Cc: 20757 <at> debbugs.gnu.org
Subject: Re: bug#20757: "unable to fork" on armhf
Date: Mon, 08 Jun 2015 14:25:28 +0200

Efraim Flashner <efraim <at> flashner.co.il> skribis:

> the log file came out a bit big, so I've hosted it here:
> https://flashner.co.il/~efraim/log

The culprit is:

  clone(child_stack=0xbe835ef8, flags=CLONE_NEWNS|CLONE_NEWUTS|CLONE_NEWIPC|CLONE_NEWPID|CLONE_NEWNET|SIGCHLD) = -1 EINVAL (Invalid argument)

3.0.36 is not so old so Mark probably came to the right conclusion: That
the kernel must be rebuilt with all these name space-related options.

Thanks,
Ludo’.

Message #22 received at 20757 <at> debbugs.gnu.org (full text, mbox):

From: Mark H Weaver <mhw <at> netris.org>
To: Efraim Flashner <efraim <at> flashner.co.il>
Cc: 20757 <at> debbugs.gnu.org
Subject: Re: bug#20757: "unable to fork" on armhf
Date: Sun, 14 Jun 2015 09:13:17 -0400

Any update on this?  Did you try rebuilding your kernel with the needed
configuration options enabled?

    Thanks,
      Mark

Message #25 received at 20757 <at> debbugs.gnu.org (full text, mbox):

From: Efraim Flashner <efraim <at> flashner.co.il>
To: Mark H Weaver <mhw <at> netris.org>
Cc: 20757 <at> debbugs.gnu.org
Subject: Re: bug#20757: "unable to fork" on armhf
Date: Sun, 14 Jun 2015 16:52:51 +0300

[Message part 1 (text/plain, inline)]

On Sun, 14 Jun 2015 09:13:17 -0400
Mark H Weaver <mhw <at> netris.org> wrote:

> Any update on this?  Did you try rebuilding your kernel with the needed
> configuration options enabled?
> 
>     Thanks,
>       Mark

I haven't had a chance yet to rebuild my kernel yet, but I hope to tonight

-- 
Efraim Flashner   <efraim <at> flashner.co.il>   אפרים פלשנר
GPG key = A28B F40C 3E55 1372 662D  14F7 41AA E7DC CA3D 8351
Confidentiality cannot be guaranteed on emails sent or received unencrypted

[Message part 2 (application/pgp-signature, inline)]

Message #28 received at 20757 <at> debbugs.gnu.org (full text, mbox):

From: Efraim Flashner <efraim <at> flashner.co.il>
To: Mark H Weaver <mhw <at> netris.org>
Cc: 20757 <at> debbugs.gnu.org
Subject: Re: bug#20757: "unable to fork" on armhf
Date: Mon, 15 Jun 2015 14:53:34 +0300

[Message part 1 (text/plain, inline)]

On Sun, 14 Jun 2015 16:52:51 +0300
Efraim Flashner <efraim <at> flashner.co.il> wrote:

> On Sun, 14 Jun 2015 09:13:17 -0400
> Mark H Weaver <mhw <at> netris.org> wrote:
> 
> > Any update on this?  Did you try rebuilding your kernel with the needed
> > configuration options enabled?
> > 
> >     Thanks,
> >       Mark
> 
> I haven't had a chance yet to rebuild my kernel yet, but I hope to tonight
> 

I recompiled the kernel, still getting failed to fork. I'm missing something
board specific about using the new kernel. I'll figure it out soonish.

-- 
Efraim Flashner   <efraim <at> flashner.co.il>   אפרים פלשנר
GPG key = A28B F40C 3E55 1372 662D  14F7 41AA E7DC CA3D 8351
Confidentiality cannot be guaranteed on emails sent or received unencrypted

[Message part 2 (application/pgp-signature, inline)]

Message #31 received at 20757 <at> debbugs.gnu.org (full text, mbox):

From: ludo <at> gnu.org (Ludovic Courtès)
To: Efraim Flashner <efraim <at> flashner.co.il>
Cc: Mark H Weaver <mhw <at> netris.org>, 20757 <at> debbugs.gnu.org,
 20735 <at> debbugs.gnu.org
Subject: Re: bug#20757: "unable to fork" on armhf
Date: Tue, 14 Jul 2015 15:33:58 +0200

Efraim Flashner <efraim <at> flashner.co.il> skribis:

> I recompiled the kernel, still getting failed to fork. I'm missing something
> board specific about using the new kernel. I'll figure it out soonish.

Did you have a chance to look further into it?

Thanks,
Ludo’.

Message #34 received at 20757 <at> debbugs.gnu.org (full text, mbox):

From: Efraim Flashner <efraim <at> flashner.co.il>
To: ludo <at> gnu.org (Ludovic Courtès)
Cc: Mark H Weaver <mhw <at> netris.org>, 20757 <at> debbugs.gnu.org,
 20735 <at> debbugs.gnu.org
Subject: Re: bug#20757: "unable to fork" on armhf
Date: Sun, 19 Jul 2015 22:09:37 +0300

[Message part 1 (text/plain, inline)]

On Tue, 14 Jul 2015 15:33:58 +0200
ludo <at> gnu.org (Ludovic Courtès) wrote:

> Efraim Flashner <efraim <at> flashner.co.il> skribis:
> 
> > I recompiled the kernel, still getting failed to fork. I'm missing
> > something board specific about using the new kernel. I'll figure it out
> > soonish.
> 
> Did you have a chance to look further into it?
> 
> Thanks,
> Ludo’.

Unfortunately I haven't had a chance to look at it more yet. I've been having
trouble with getting the board to accept my kernel for booting, so now I'm
looking at using one of the other images available (ubunutu, suse) and seeing
if they have the required kernel settings enabled. Given the problems I've
been having, when I do get it to work I plan on following their instructions
for getting the board to boot from a thumbdrive/sdcard and using that as a
target for guixsd. The two things I see as potential blockers down that road
is figuring out uboot, and I'll also have to make a separate rockchip.scm
with the 3(?) programs I needed to compile from source to get the video
working correctly.

Currently I'm on vacation for almost another 3 weeks, and I left the arm
board at home, so I can't work on it too much atm.

-- 
Efraim Flashner   <efraim <at> flashner.co.il>   אפרים פלשנר
GPG key = A28B F40C 3E55 1372 662D  14F7 41AA E7DC CA3D 8351
Confidentiality cannot be guaranteed on emails sent or received unencrypted

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Message #37 received at 20757 <at> debbugs.gnu.org (full text, mbox):

From: ludo <at> gnu.org (Ludovic Courtès)
To: Efraim Flashner <efraim <at> flashner.co.il>
Cc: Mark H Weaver <mhw <at> netris.org>, 20757 <at> debbugs.gnu.org,
 20735 <at> debbugs.gnu.org
Subject: Re: bug#20757: "unable to fork" on armhf
Date: Fri, 11 Sep 2015 19:31:09 +0200

Efraim Flashner <efraim <at> flashner.co.il> skribis:

> On Sun, 14 Jun 2015 16:52:51 +0300
> Efraim Flashner <efraim <at> flashner.co.il> wrote:
>
>> On Sun, 14 Jun 2015 09:13:17 -0400
>> Mark H Weaver <mhw <at> netris.org> wrote:
>> 
>> > Any update on this?  Did you try rebuilding your kernel with the needed
>> > configuration options enabled?
>> > 
>> >     Thanks,
>> >       Mark
>> 
>> I haven't had a chance yet to rebuild my kernel yet, but I hope to tonight
>> 
>
> I recompiled the kernel, still getting failed to fork. I'm missing something
> board specific about using the new kernel. I'll figure it out soonish.

Hi!  Any update?  Or should we close the bug until we have more clues?

Thanks,
Ludo’.

Message #40 received at 20757 <at> debbugs.gnu.org (full text, mbox):

From: Efraim Flashner <efraim <at> flashner.co.il>
To: ludo <at> gnu.org (Ludovic Courtès)
Cc: Mark H Weaver <mhw <at> netris.org>, 20757 <at> debbugs.gnu.org,
 20735 <at> debbugs.gnu.org
Subject: Re: bug#20757: "unable to fork" on armhf
Date: Sun, 13 Sep 2015 07:17:03 +0300

[Message part 1 (text/plain, inline)]

On Fri, 11 Sep 2015 19:31:09 +0200
ludo <at> gnu.org (Ludovic Courtès) wrote:

> Efraim Flashner <efraim <at> flashner.co.il> skribis:
> 
> > On Sun, 14 Jun 2015 16:52:51 +0300
> > Efraim Flashner <efraim <at> flashner.co.il> wrote:
> >
> >> On Sun, 14 Jun 2015 09:13:17 -0400
> >> Mark H Weaver <mhw <at> netris.org> wrote:
> >> 
> >> > Any update on this?  Did you try rebuilding your kernel with the needed
> >> > configuration options enabled?
> >> > 
> >> >     Thanks,
> >> >       Mark
> >> 
> >> I haven't had a chance yet to rebuild my kernel yet, but I hope to
> >> tonight
> >> 
> >
> > I recompiled the kernel, still getting failed to fork. I'm missing
> > something board specific about using the new kernel. I'll figure it out
> > soonish.
> 
> Hi!  Any update?  Or should we close the bug until we have more clues?
> 
> Thanks,
> Ludo’.

Lets close it for now. I haven't had anytime to work on it still, and its not
a guix bug that an unrelated kernel didn't have the configuration set the way
we'd like.

-- 
Efraim Flashner   <efraim <at> flashner.co.il>   אפרים פלשנר
GPG key = A28B F40C 3E55 1372 662D  14F7 41AA E7DC CA3D 8351
Confidentiality cannot be guaranteed on emails sent or received unencrypted

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Message #45 received at 20757-done <at> debbugs.gnu.org (full text, mbox):

From: ludo <at> gnu.org (Ludovic Courtès)
To: Efraim Flashner <efraim <at> flashner.co.il>
Cc: Mark H Weaver <mhw <at> netris.org>, 20757-done <at> debbugs.gnu.org,
 20735 <at> debbugs.gnu.org
Subject: Re: bug#20757: "unable to fork" on armhf
Date: Sun, 13 Sep 2015 11:33:03 +0200

Efraim Flashner <efraim <at> flashner.co.il> skribis:

> Lets close it for now. I haven't had anytime to work on it still, and its not
> a guix bug that an unrelated kernel didn't have the configuration set the way
> we'd like.

OK, done.

Ludo’.

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