On Thu, Aug 10, 2017 at 11:50:19AM -0500, Reza Arbab wrote:
On Thu, Aug 10, 2017 at 02:53:48PM +0530, Bharata B Rao wrote:
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index f830562..24ecf53 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -524,6 +524,7 @@ static int __init early_init_dt_scan_drconf_memory(unsigned 
long node)
                                        size = 0x80000000ul - base;
                        memblock_add(base, size);
+                       memblock_mark_hotplug(base, size);
                } while (--rngs);

Doing this has the effect of putting all the affected memory into ZONE_MOVABLE. See find_zone_movable_pfns_for_nodes(). This means no kernel allocations can occur there. Is that okay?

I should clarify. The behavior change I mention applies when movable_node_is_enabled().

Reza Arbab

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