The node will be offlined when all memory/cpu on the node is hotremoved.
So we should try offline the node when hotremoving a cpu on the node.

Cc: Yasuaki Ishimatsu <redacted>
Cc: David Rientjes <rientjes@google.com>
Cc: Jiang Liu <redacted>
Cc: Minchan Kim <redacted>
Cc: KOSAKI Motohiro <redacted>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Mel Gorman <redacted>
Cc: Thomas Gleixner <redacted>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tang Chen <redacted>
Signed-off-by: Wen Congyang <redacted>
---
 drivers/acpi/processor_driver.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c
index a4352b8..7fc728c7 100644
--- a/drivers/acpi/processor_driver.c
+++ b/drivers/acpi/processor_driver.c

@@ -44,6 +44,7 @@
 #include <linux/moduleparam.h>
 #include <linux/cpuidle.h>
 #include <linux/slab.h>
+#include <linux/memory_hotplug.h>
 
 #include <asm/io.h>
 #include <asm/cpu.h>

@@ -634,6 +635,7 @@ static int acpi_processor_remove(struct acpi_device *device, int type)
 
 	per_cpu(processors, pr->id) = NULL;
 	per_cpu(processor_device_array, pr->id) = NULL;
+	try_offline_node(cpu_to_node(pr->id));
 
 free:
 	free_cpumask_var(pr->throttling.shared_cpu_map);

-- 
1.8.0

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