If kernelcore is not set, then we are working with a very large kernelcore
for nothing - no movable zone will be created. If kernelcore is set,
then it is not respected at all.
Signed-off-by: Zhihui Zhang <zzhs...@gmail.com>
---
mm/page_alloc.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 40e2942..32bf5da 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5199,7 +5199,11 @@ static void __init find_zone_movable_pfns_for_nodes(void)
*/
required_movablecore =
roundup(required_movablecore, MAX_ORDER_NR_PAGES);
- corepages = totalpages - required_movablecore;
+
+ if (totalpages > required_movablecore)
+ corepages = totalpages - required_movablecore;
+ else
+ corepages = 0;
required_kernelcore = max(required_kernelcore, corepages);
}
--
1.9.1
--
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