mm/mm_init: don't overlap NORMAL and MOVABLE zones with kernelcore=mirror

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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.

Co-developed-by: Wei Yang <richard.weiyang@gmail.com>
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Link: https://patch.msgid.link/20260630072212.624305-2-rppt@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reviewed-by: David Hildenbrand (Arm) <david@kernel.org>

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This commit is contained in:

Mike Rapoport (Microsoft) 2026-06-30 10:22:11 +03:00

parent dc59e4fea9

commit eb0e5b6136

1 changed files with 3 additions and 33 deletions

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mm/mm_init.c

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