The patch titled
Subject: mm/page_alloc.c: skip ZONE_MOVABLE if required_kernelcore is larger than totalpages
has been added to the -mm tree. Its filename is
mm-skip-if-required_kernelcore-is-larger-than-totalpages.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-skip-if-required_kernelcore-is-larger-than-totalpages.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-skip-if-required_kernelcore-is-larger-than-totalpages.patch
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------------------------------------------------------
From: Xishi Qiu <qiuxishi@xxxxxxxxxx>
Subject: mm/page_alloc.c: skip ZONE_MOVABLE if required_kernelcore is larger than totalpages
If kernelcore was not specified, or the kernelcore size is zero
(required_movablecore >= totalpages), or the kernelcore size is larger
than totalpages, there is no ZONE_MOVABLE. We should fill the zone with
both kernel memory and movable memory.
Signed-off-by: Xishi Qiu <qiuxishi@xxxxxxxxxx>
Cc: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: "David Rientjes" <rientjes@xxxxxxxxxx>
Cc: Tang Chen <tangchen@xxxxxxxxxxxxxx>
Cc: <zhongjiang@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff -puN mm/page_alloc.c~mm-skip-if-required_kernelcore-is-larger-than-totalpages mm/page_alloc.c
--- a/mm/page_alloc.c~mm-skip-if-required_kernelcore-is-larger-than-totalpages
+++ a/mm/page_alloc.c
@@ -5495,8 +5495,11 @@ static void __init find_zone_movable_pfn
required_kernelcore = max(required_kernelcore, corepages);
}
- /* If kernelcore was not specified, there is no ZONE_MOVABLE */
- if (!required_kernelcore)
+ /*
+ * If kernelcore was not specified or kernelcore size is larger
+ * than totalpages, there is no ZONE_MOVABLE.
+ */
+ if (!required_kernelcore || required_kernelcore >= totalpages)
goto out;
/* usable_startpfn is the lowest possible pfn ZONE_MOVABLE can be at */
_
Patches currently in -mm which might be from qiuxishi@xxxxxxxxxx are
mm-fix-overflow-in-find_zone_movable_pfns_for_nodes.patch
mm-skip-if-required_kernelcore-is-larger-than-totalpages.patch
kasan-use-is_aligned-in-memory_is_poisoned_8.patch
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