1 files changed, 13 insertions, 1 deletions

diff --git a/include/trace/events/kmem.h b/include/trace/events/kmem.h
index 78efa0a197a9..aa863549e77a 100644
--- a/include/trace/events/kmem.h
+++ b/include/trace/events/kmem.h
@@ -158,12 +158,24 @@ DEFINE_EVENT_CONDITION(kmem_free, kmem_cache_free,
         TP_CONDITION(cpu_online(raw_smp_processor_id()))
 );
 
-TRACE_EVENT(mm_page_free,
+TRACE_EVENT_CONDITION(mm_page_free,
 
         TP_PROTO(struct page *page, unsigned int order),
 
         TP_ARGS(page, order),
 
+
+        /*
+         * This trace can be potentially called from an offlined cpu.
+         * Since trace points use RCU and RCU should not be used from
+         * offline cpus, filter such calls out.
+         * While this trace can be called from a preemptable section,
+         * it has no impact on the condition since tasks can migrate
+         * only from online cpus to other online cpus. Thus its safe
+         * to use raw_smp_processor_id.
+         */
+        TP_CONDITION(cpu_online(raw_smp_processor_id())),
+
         TP_STRUCT__entry(
                 __field(        unsigned long,  pfn             )
                 __field(        unsigned int,   order           )