memory-failure.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#undef TRACE_SYSTEM
 3#define TRACE_SYSTEM memory_failure
 4#define TRACE_INCLUDE_FILE memory-failure
 5
 6#if !defined(_TRACE_MEMORY_FAILURE_H) || defined(TRACE_HEADER_MULTI_READ)
 7#define _TRACE_MEMORY_FAILURE_H
 8
 9#include <linux/tracepoint.h>
10#include <linux/mm.h>
11
12/*
13 * memory-failure recovery action result event
14 *
15 * unsigned long pfn -	Page Frame Number of the corrupted page
16 * int type	-	Page types of the corrupted page
17 * int result	-	Result of recovery action
18 */
19
20#define MF_ACTION_RESULT	\
21	EM ( MF_IGNORED, "Ignored" )	\
22	EM ( MF_FAILED,  "Failed" )	\
23	EM ( MF_DELAYED, "Delayed" )	\
24	EMe ( MF_RECOVERED, "Recovered" )
25
26#define MF_PAGE_TYPE		\
27	EM ( MF_MSG_KERNEL, "reserved kernel page" )			\
28	EM ( MF_MSG_KERNEL_HIGH_ORDER, "high-order kernel page" )	\
29	EM ( MF_MSG_HUGE, "huge page" )					\
30	EM ( MF_MSG_FREE_HUGE, "free huge page" )			\
31	EM ( MF_MSG_GET_HWPOISON, "get hwpoison page" )			\
32	EM ( MF_MSG_UNMAP_FAILED, "unmapping failed page" )		\
33	EM ( MF_MSG_DIRTY_SWAPCACHE, "dirty swapcache page" )		\
34	EM ( MF_MSG_CLEAN_SWAPCACHE, "clean swapcache page" )		\
35	EM ( MF_MSG_DIRTY_MLOCKED_LRU, "dirty mlocked LRU page" )	\
36	EM ( MF_MSG_CLEAN_MLOCKED_LRU, "clean mlocked LRU page" )	\
37	EM ( MF_MSG_DIRTY_UNEVICTABLE_LRU, "dirty unevictable LRU page" )	\
38	EM ( MF_MSG_CLEAN_UNEVICTABLE_LRU, "clean unevictable LRU page" )	\
39	EM ( MF_MSG_DIRTY_LRU, "dirty LRU page" )			\
40	EM ( MF_MSG_CLEAN_LRU, "clean LRU page" )			\
41	EM ( MF_MSG_TRUNCATED_LRU, "already truncated LRU page" )	\
42	EM ( MF_MSG_BUDDY, "free buddy page" )				\
43	EM ( MF_MSG_DAX, "dax page" )					\
44	EM ( MF_MSG_UNSPLIT_THP, "unsplit thp" )			\
45	EM ( MF_MSG_ALREADY_POISONED, "already poisoned" )		\
46	EM ( MF_MSG_PFN_MAP, "non struct page pfn" )                    \
47	EMe ( MF_MSG_UNKNOWN, "unknown page" )
48
49/*
50 * First define the enums in MM_ACTION_RESULT to be exported to userspace
51 * via TRACE_DEFINE_ENUM().
52 */
53#undef EM
54#undef EMe
55#define EM(a, b) TRACE_DEFINE_ENUM(a);
56#define EMe(a, b)	TRACE_DEFINE_ENUM(a);
57
58MF_ACTION_RESULT
59MF_PAGE_TYPE
60
61/*
62 * Now redefine the EM() and EMe() macros to map the enums to the strings
63 * that will be printed in the output.
64 */
65#undef EM
66#undef EMe
67#define EM(a, b)		{ a, b },
68#define EMe(a, b)	{ a, b }
69
70TRACE_EVENT(memory_failure_event,
71	TP_PROTO(unsigned long pfn,
72		 int type,
73		 int result),
74
75	TP_ARGS(pfn, type, result),
76
77	TP_STRUCT__entry(
78		__field(unsigned long, pfn)
79		__field(int, type)
80		__field(int, result)
81	),
82
83	TP_fast_assign(
84		__entry->pfn	= pfn;
85		__entry->type	= type;
86		__entry->result	= result;
87	),
88
89	TP_printk("pfn %#lx: recovery action for %s: %s",
90		__entry->pfn,
91		__print_symbolic(__entry->type, MF_PAGE_TYPE),
92		__print_symbolic(__entry->result, MF_ACTION_RESULT)
93	)
94);
95#endif /* _TRACE_MEMORY_FAILURE_H */
96
97/* This part must be outside protection */
98#include <trace/define_trace.h>