[CRIU] ppc64le criu auxv problems

[Laurent Dufour]

On 07/08/2017 17:17, Pavel Emelyanov wrote:
> On 08/04/2017 01:11 PM, Adrian Reber wrote:
>> I have problems building CRIU on ppc64le and running the binary on
>> different kernel versions. This is from the standpoint of providing a
>> distribution package. I want to build criu on a 3.10 kernel and have the
>> same binary run on 4.1x.y
>>
>> The problem with ppc64le is that the following test tells me that there
>> is something wrong:
>>
>> ############## Test zdtm/static/cmdlinenv00 FAIL at result check ###############
>> Test output: ================================
>> 06:02:02.188:    30: old cmdline: ./cmdlinenv00
>> 06:02:02.188:    30: old environ: RHTS_OPTION_COMPAT_SERVICE=
>> 06:02:02.300:    30: new cmdline: ./cmdlinenv00
>> 06:02:02.300:    30: new environ: RHTS_OPTION_COMPAT_SERVICE=
>> 06:02:02.300:    30: FAIL: cmdlinenv00.c:116: auxv corrupted on restore (errno = 11 (Resource temporarily unavailable))
>>
>>
>> which is correct and kind of related to:
>>
>>     commit c10e0d215412edac55e941f57cc4ba80422968dd
>>     Author: Gianfranco Costamagna <costamagnagianfranco at yahoo.it>
>>     Date:   Wed Jul 5 12:50:07 2017 +0200
>>     
>>         Fix ppc64el build failure, by not redefining AT_VECTOR_SIZE_ARCH
>>
>>
>> CRIU hardcodes it to 6 and newer kernels set it to 14. So if I compile
>> my CRIU package on an older kernel it is set to 6. If I run the same RPM
>> on a newer kernel I get the failure from above as it does not match the
>> compile time values any more. Any ideas how to solve this during
>> runtime?
> 
> So the question is about how to auto-detect the aux vector size? Heh ... need
> to look at the kernel, maybe the answer is obvious :)
> 
> I've added Laurent to Cc, maybe he already knows the answer

Hi Pavel and Adrian,

I don't have the answer but I'll looking for it ;)

Cheers,
Laurent.