On Tue, Mar 22, 2022 at 02:54:20PM -0700, Guenter Roeck wrote:
> On 3/22/22 11:24, Mark Brown wrote:

> > Just as a datapoint for debugging at least qemu/arm is getting coverage
> > in CI systems (KernelCI is covering a bunch of different emulated
> > machines and LKFT has at least one configuration as well, clang's tests
> > have some wider architecture coverage as well I think) and they don't
> > seem to be seeing any problems - there's some other variable in there.

> I use buildroot 2021.02.3. I have not changed the buildroot code, and it
> still seems to be the same in 2022.02. I don't see the problem with all
> boot tests, only with the architectures mentioned above, and not with all
> qemu machines on the affected platforms. For arm, mostly older machines
> are affected (versatile, realview, pxa configurations, collie, integratorcp,
> sx1, mps2-an385, vexpress-a9, cubieboard). I didn't check, but maybe
> kernelci doesn't test those machines ?

Kind of academic given that Jason seems to have a handle on what the
issues are but for KernelCI it's variations on mach-virt, plus
versatile-pb.  There's a physical cubietruck as well, and BeagleBone
Blacks among others.  My best guess would be systems with low RAM are
somehow more prone to issues.