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Commit 97f0b134 authored by Xie XiuQi's avatar Xie XiuQi Committed by Linus Torvalds
Browse files

tracing: add trace event for memory-failure 



RAS user space tools like rasdaemon which base on trace event, could
receive mce error event, but no memory recovery result event.  So, I want
to add this event to make this scenario complete.

This patch add a event at ras group for memory-failure.

The output like below:
#  tracer: nop
#
#  entries-in-buffer/entries-written: 2/2   #P:24
#
#                               _-----=> irqs-off
#                              / _----=> need-resched
#                             | / _---=> hardirq/softirq
#                             || / _--=> preempt-depth
#                             ||| /     delay
#            TASK-PID   CPU#  ||||    TIMESTAMP  FUNCTION
#               | |       |   ||||       |         |
       mce-inject-13150 [001] ....   277.019359: memory_failure_event: pfn 0x19869: recovery action for free buddy page: Delayed

[xiexiuqi@huawei.com: fix build error]
Signed-off-by: default avatarXie XiuQi <xiexiuqi@huawei.com>
Reviewed-by: default avatarNaoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Acked-by: default avatarSteven Rostedt <rostedt@goodmis.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Chen Gong <gong.chen@linux.intel.com>
Cc: Jim Davis <jim.epost@gmail.com>
Signed-off-by: default avatarXie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent cc3e2af4

include/ras/ras_event.h

+85 −0
Original line number Diff line number Diff line
@@ -11,6 +11,7 @@ 
#include <linux/pci.h>

#include <linux/aer.h>

#include <linux/cper.h>

#include <linux/mm.h>



/*

 * MCE Extended Error Log trace event
@@ -232,6 +233,90 @@ TRACE_EVENT(aer_event, 
		__print_flags(__entry->status, "|", aer_uncorrectable_errors))

);



/*

 * 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

 */



#ifdef CONFIG_MEMORY_FAILURE

#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_SLAB, "kernel slab page" )				\

	EM ( MF_MSG_DIFFERENT_COMPOUND, "different compound page after locking" ) \

	EM ( MF_MSG_POISONED_HUGE, "huge page already hardware poisoned" )	\

	EM ( MF_MSG_HUGE, "huge page" )					\

	EM ( MF_MSG_FREE_HUGE, "free huge 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_BUDDY_2ND, "free buddy page (2nd try)" )		\

	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 /* CONFIG_MEMORY_FAILURE */

#endif /* _TRACE_HW_EVENT_MC_H */



/* This part must be outside protection */

mm/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -368,6 +368,7 @@ config MEMORY_FAILURE 
	depends on ARCH_SUPPORTS_MEMORY_FAILURE

	bool "Enable recovery from hardware memory errors"

	select MEMORY_ISOLATION

	select RAS

	help

	  Enables code to recover from some memory failures on systems

	  with MCA recovery. This allows a system to continue running

mm/memory-failure.c

+3 −0
Original line number Diff line number Diff line
@@ -57,6 +57,7 @@ 
#include <linux/mm_inline.h>

#include <linux/kfifo.h>

#include "internal.h"

#include "ras/ras_event.h"



int sysctl_memory_failure_early_kill __read_mostly = 0;
@@ -855,6 +856,8 @@ static struct page_state { 
static void action_result(unsigned long pfn, enum mf_action_page_type type,

			  enum mf_result result)

{

	trace_memory_failure_event(pfn, type, result);



	pr_err("MCE %#lx: recovery action for %s: %s\n",

		pfn, action_page_types[type], action_name[result]);

}