Re: [PATCH 1/2] mm/mm_init: don't overlap NORMAL and MOVABLE zones with kernelcore=mirror

[David Hildenbrand (Arm)]

On 6/25/26 09:39, Mike Rapoport wrote:
> From: "Mike Rapoport (Microsoft)" <rppt@xxxxxxxxxx>
> 
> When kernelcore or movablecore kernel parameters define size of the
> NORMAL and MOVABLE zones as percents of the total memory or by absolute
> value, ZONE_NORMAL is clamped at the beginning of ZONE_MOVABLE.
> 
> However, when kernelcore=mirror the ZONE_NORMAL span is not changed but
> rather pages from ZONE_MOVABLE counted as absent in ZONE_NORMAL.
> 
> Make the behaviour of kernelcore= parameter uniform and treat mirror
> just as another way to size the zones.

That sounds just about right to me.

Hard to imagine that any code would have relied on the old behavior.


Reviewed-by: David Hildenbrand (Arm) <david@xxxxxxxxxx>

-- 
Cheers,

David