Re: [PATCH v2 0/3] Yocto Gitlab CI

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Wed, 12 Oct 2022, Bertrand Marquis wrote:
> This patch series is a first attempt to check if we could use Yocto in
> gitlab ci to build and run xen on qemu for arm, arm64 and x86.
> 
> The first patch is creating a container with all elements required to
> build Yocto, a checkout of the yocto layers required and an helper
> script to build and run xen on qemu with yocto.
> 
> The second patch is creating containers with a first build of yocto done
> so that susbsequent build with those containers would only rebuild what
> was changed and take the rest from the cache.
> 
> The third patch is adding a way to easily clean locally created
> containers.
> 
> This is is mainly for discussion and sharing as there are still some
> issues/problem to solve:
> - building the qemu* containers can take several hours depending on the
>   network bandwith and computing power of the machine where those are
>   created
> - produced containers containing the cache have a size between 8 and
>   12GB depending on the architecture. We might need to store the build
>   cache somewhere else to reduce the size. If we choose to have one
>   single image, the needed size is around 20GB and we need up to 40GB
>   during the build, which is why I splitted them.
> - during the build and run, we use a bit more then 20GB of disk which is
>   over the allowed size in gitlab
> 
> Once all problems passed, this can be used to build and run dom0 on qemu
> with a modified Xen on the 3 archs in less than 10 minutes.

The build still doesn't work for me. I found the reason:

  create archive failed: cpio: write failed - Cannot allocate memory

It is a "silly" out of memory error. I tried to solve the problem by
adding:

  export RPM_BUILD_NCPUS=8

at the beginning of build-yocto.sh but it didn't work. I realize that
this error might be considered a workstation configuration error at my
end but I cannot find a way past it. Any suggestions?