[CRIU] ppc64le criu auxv problems

[Pavel Emelyanov]

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

-- Pavel

> 		Adrian
> _______________________________________________
> CRIU mailing list
> CRIU at openvz.org
> https://lists.openvz.org/mailman/listinfo/criu
> .
>