If kernelcore or movablecore is specified at the same time with movablecore_map,
movablecore_map will have higher priority to be satisfied.
Signed-off-by: Tang Chen <tangchen@xxxxxxxxxxxxxx>
Reviewed-by: Wen Congyang <wency@xxxxxxxxxxxxxx>
Tested-by: Lin Feng <linfeng@xxxxxxxxxxxxxx>
---
mm/page_alloc.c | 29 +++++++++++++++++++++++++++--
1 files changed, 27 insertions(+), 2 deletions(-)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index ae29970..c8dfb1e 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -4774,7 +4774,7 @@ static unsigned long __init early_calculate_totalpages(void)
static void __init find_zone_movable_pfns_for_nodes(void)
{
int i, nid;
- unsigned long usable_startpfn;
+ unsigned long usable_startpfn, node_movable_limit;
unsigned long kernelcore_node, kernelcore_remaining;
/* save the state before borrow the nodemask */
nodemask_t saved_node_state = node_states[N_HIGH_MEMORY];
@@ -4803,7 +4803,6 @@ static void __init find_zone_movable_pfns_for_nodes(void)
required_kernelcore = max(required_kernelcore, corepages);
}
- /* If kernelcore was not specified, there is no ZONE_MOVABLE */
if (!required_kernelcore)
goto out;
@@ -4817,6 +4816,9 @@ restart:
for_each_node_state(nid, N_HIGH_MEMORY) {
unsigned long start_pfn, end_pfn;
+ node_movable_limit = zone_movable_pfn[nid];
+ zone_movable_pfn[nid] = 0;
+
/*
* Recalculate kernelcore_node if the division per node
* now exceeds what is necessary to satisfy the requested
@@ -4840,6 +4842,29 @@ restart:
if (start_pfn >= end_pfn)
continue;
+ /*
+ * If movablecore_map was specified with kernelcore
+ * or movablecore, it will have higher priority to be
+ * satisfied.
+ */
+ if (start_pfn >= node_movable_limit) {
+ /*
+ * Here, we meet the ZONE_MOVABLE boundary
+ * specified by movablecore_map. We should
+ * not spread any more, but keep the rest
+ * of kernelcore_remaining and break out.
+ * And also, usable_nodes should be decreased.
+ */
+ usable_nodes--;
+ break;
+ }
+
+ /*
+ * If ZONE_MOVABLE start_pfn is in the range, we need
+ * to shrink end_pfn to ZONE_MOVABLE start_pfn.
+ */
+ end_pfn = min(end_pfn, node_movable_limit);
+
/* Account for what is only usable for kernelcore */
if (start_pfn < usable_startpfn) {
unsigned long kernel_pages;
--
1.7.1
--
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