Re: INTERNAL: Exiting with 2 jobserver tokens available; should be 5!

[Jaak Ristioja]

On 09.11.2016 20:09, Jaak Ristioja wrote:
> On 09.11.2016 19:55, Paul Smith wrote:
>> On Wed, 2016-11-09 at 19:29 +0200, Jaak Ristioja wrote:
>>> GNU Make seems to randomly crash on an Raspberry Pi 2 with
>>>
>>>    INTERNAL: Exiting with 2 jobserver tokens available; should be 5!
>>>
>>> or similar when emerging Gentoo Linux packages using multiple jobs
>>> (e.g. -j5). The kernel log then has lines like
>>>
>>>   Segmentation fault occurred at    (nil) in
>>> /usr/bin/gmake[make:23312]
>>> uid/euid:250/250 gid/egid:250/250, parent /bin/bash[sh:23311]
>>> uid/euid:250/250 gid/egid:250/250
>>
>> Internal errors don't dump core in GNU make.
>>
>> I think what is happening is that GNU make is crashing, and that's
>> causing it to lose jobserver tokens (if an instance of GNU make owns an
>> extra token and crashes, then no one is available to release that token
>> again and you'll get an error about mismatched numbers of tokens at the
>> end of the build).
>>
>> In other words, cause and effect here are backwards.  You'll need to
>> figure out why GNU make is throwing a segfault (is there a core file
>> you can examine for example): fixing that will likely solve the token
>> count issue.
>>
>>> Is this some known GNU Make bug on ARM?
>>
>> I'm not aware of any such bug on ARM.
>>
>> It would be helpful if you mentioned which version of GNU make you're
>> using.
> 
> # make --version
> GNU Make 4.2.1
> Built for armv7a-hardfloat-linux-gnueabi
> 
> But this also happened with 4.1 and 4.2.

I'm attaching[*] the core and the binaries for 4.2.1, but I don't know how
to debug it myself.

FWIW, these are probably compiled using

  CHOST="armv7a-hardfloat-linux-gnueabi"
  CFLAGS="-O2 -pipe -mcpu=cortex-a7 -mfpu=neon-vfpv4 -mfloat-abi=hard"

in my /etc/portage/make.conf file.

Best regards,
J


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 xzcat rpi2-make-crash.tar.base64.xz | base64 -d | tar -xf -

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rpi2-make-crash.tar.base64.xz
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