On Wed 14-03-18 14:35:12, Ard Biesheuvel wrote: > On 14 March 2018 at 14:13, Michal Hocko <[email protected]> wrote: > > Does http://lkml.kernel.org/r/[email protected] > > fix your issue? From the debugging info you provided it should because > > the patch prevents jumping backwards. > > > > The patch does fix the boot hang. > > But I am concerned that we are papering over a fundamental flaw in > memblock_next_valid_pfn().
It seems that memblock_next_valid_pfn is doing the right thing here. It is the alignment which moves the pfn back AFAICS. I am not really impressed about the original patch either, to be completely honest. It just looks awfully tricky. I still didn't manage to wrap my head around the original issue though so I do not have much better ideas to be honest. -- Michal Hocko SUSE Labs
