1 files changed, 98 insertions, 0 deletions
diff --git a/include/trace/events/memory-failure.h b/include/trace/events/memory-failure.h
new file mode 100644
index 000000000000..aa57cc8f896b
--- /dev/null
+++ b/include/trace/events/memory-failure.h
@@ -0,0 +1,98 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM memory_failure
+#define TRACE_INCLUDE_FILE memory-failure
+
+#if !defined(_TRACE_MEMORY_FAILURE_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_MEMORY_FAILURE_H
+
+#include <linux/tracepoint.h>
+#include <linux/mm.h>
+
+/*
+ * memory-failure recovery action result event
+ *
+ * unsigned long pfn -	Page Frame Number of the corrupted page
+ * int type	-	Page types of the corrupted page
+ * int result	-	Result of recovery action
+ */
+
+#define MF_ACTION_RESULT	\
+	EM ( MF_IGNORED, "Ignored" )	\
+	EM ( MF_FAILED,  "Failed" )	\
+	EM ( MF_DELAYED, "Delayed" )	\
+	EMe ( MF_RECOVERED, "Recovered" )
+
+#define MF_PAGE_TYPE		\
+	EM ( MF_MSG_KERNEL, "reserved kernel page" )			\
+	EM ( MF_MSG_KERNEL_HIGH_ORDER, "high-order kernel page" )	\
+	EM ( MF_MSG_HUGE, "huge page" )					\
+	EM ( MF_MSG_FREE_HUGE, "free huge page" )			\
+	EM ( MF_MSG_GET_HWPOISON, "get hwpoison page" )			\
+	EM ( MF_MSG_UNMAP_FAILED, "unmapping failed page" )		\
+	EM ( MF_MSG_DIRTY_SWAPCACHE, "dirty swapcache page" )		\
+	EM ( MF_MSG_CLEAN_SWAPCACHE, "clean swapcache page" )		\
+	EM ( MF_MSG_DIRTY_MLOCKED_LRU, "dirty mlocked LRU page" )	\
+	EM ( MF_MSG_CLEAN_MLOCKED_LRU, "clean mlocked LRU page" )	\
+	EM ( MF_MSG_DIRTY_UNEVICTABLE_LRU, "dirty unevictable LRU page" )	\
+	EM ( MF_MSG_CLEAN_UNEVICTABLE_LRU, "clean unevictable LRU page" )	\
+	EM ( MF_MSG_DIRTY_LRU, "dirty LRU page" )			\
+	EM ( MF_MSG_CLEAN_LRU, "clean LRU page" )			\
+	EM ( MF_MSG_TRUNCATED_LRU, "already truncated LRU page" )	\
+	EM ( MF_MSG_BUDDY, "free buddy page" )				\
+	EM ( MF_MSG_DAX, "dax page" )					\
+	EM ( MF_MSG_UNSPLIT_THP, "unsplit thp" )			\
+	EM ( MF_MSG_ALREADY_POISONED, "already poisoned" )		\
+	EM ( MF_MSG_PFN_MAP, "non struct page pfn" )                    \
+	EMe ( MF_MSG_UNKNOWN, "unknown page" )
+
+/*
+ * First define the enums in MM_ACTION_RESULT to be exported to userspace
+ * via TRACE_DEFINE_ENUM().
+ */
+#undef EM
+#undef EMe
+#define EM(a, b) TRACE_DEFINE_ENUM(a);
+#define EMe(a, b)	TRACE_DEFINE_ENUM(a);
+
+MF_ACTION_RESULT
+MF_PAGE_TYPE
+
+/*
+ * Now redefine the EM() and EMe() macros to map the enums to the strings
+ * that will be printed in the output.
+ */
+#undef EM
+#undef EMe
+#define EM(a, b)		{ a, b },
+#define EMe(a, b)	{ a, b }
+
+TRACE_EVENT(memory_failure_event,
+	TP_PROTO(unsigned long pfn,
+		 int type,
+		 int result),
+
+	TP_ARGS(pfn, type, result),
+
+	TP_STRUCT__entry(
+		__field(unsigned long, pfn)
+		__field(int, type)
+		__field(int, result)
+	),
+
+	TP_fast_assign(
+		__entry->pfn	= pfn;
+		__entry->type	= type;
+		__entry->result	= result;
+	),
+
+	TP_printk("pfn %#lx: recovery action for %s: %s",
+		__entry->pfn,
+		__print_symbolic(__entry->type, MF_PAGE_TYPE),
+		__print_symbolic(__entry->result, MF_ACTION_RESULT)
+	)
+);
+#endif /* _TRACE_MEMORY_FAILURE_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>