Re: [PATCH v2 2/9] mm/vmstat: show start_pfn when zone spans pages

[Michal Hocko]

On Wed 12-10-22 16:57:53, Doug Berger wrote:
[...]
> I was working from the notion that the classic 'movablecore' implementation
> keeps the ZONE_MOVABLE zone the last zone on System RAM so it always spans
> the last page on the node (i.e. 0x33ffff000). My implementation moves the
> start of ZONE_MOVABLE up to the lowest page of any defined DMBs on the node.

I wouldn't rely on movablecore specific implementation. ZONE_MOVABLE can
span any physical address range. ZONE_NORMAL usually covers any ranges
not covered by more specific zones like ZONE_DMA{32}. At least on most
architectures I am familiar with.
-- 
Michal Hocko
SUSE Labs