[PATCH v4 0/3] tracing: add trace event for memory-failure

[PATCH v4 0/3] tracing: add trace event for memory-failure

[Xie XiuQi]

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 patchset 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

--
v3->v4:
 - rebase on top of latest linux-next
 - update comments as Naoya's suggestion
 - add #ifdef CONFIG_MEMORY_FAILURE for this trace event
 - change type of action_result's param 3 to enum

v2->v3:
 - rebase on top of linux-next
 - based on Steven Rostedt's "tracing: Add TRACE_DEFINE_ENUM() macro
   to map enums to their values" patch set v1.

v1->v2:
 - Comment update
 - Just passing 'result' instead of 'action_name[result]',
   suggested by Steve. And hard coded there because trace-cmd
   and perf do not have a way to process enums.

Xie XiuQi (3):
  memory-failure: export page_type and action result
  memory-failure: change type of action_result's param 3 to enum
  tracing: add trace event for memory-failure

 include/linux/mm.h      |  34 ++++++++++
 include/ras/ras_event.h |  85 ++++++++++++++++++++++++
 mm/memory-failure.c     | 172 ++++++++++++++++++++----------------------------
 3 files changed, 190 insertions(+), 101 deletions(-)

-- 
1.8.3.1

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[PATCH v4 1/3] memory-failure: export page_type and action result

[Xie XiuQi]

Export 'outcome' and 'action_page_type' to mm.h, so we could use
this enums outside.

This patch is preparation for adding trace events for memory-failure
recovery action.

Signed-off-by: Xie XiuQi <xiexiuqi@huawei.com>
---
 include/linux/mm.h  |  34 +++++++++++
 mm/memory-failure.c | 168 +++++++++++++++++++++-------------------------------
 2 files changed, 101 insertions(+), 101 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 8b08607..8413615 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2152,6 +2152,40 @@ extern void shake_page(struct page *p, int access);
 extern atomic_long_t num_poisoned_pages;
 extern int soft_offline_page(struct page *page, int flags);
 
+
+/*
+ * Error handlers for various types of pages.
+ */
+enum mf_outcome {
+	MF_IGNORED,	/* Error: cannot be handled */
+	MF_FAILED,	/* Error: handling failed */
+	MF_DELAYED,	/* Will be handled later */
+	MF_RECOVERED,	/* Successfully recovered */
+};
+
+enum mf_action_page_type {
+	MF_MSG_KERNEL,
+	MF_MSG_KERNEL_HIGH_ORDER,
+	MF_MSG_SLAB,
+	MF_MSG_DIFFERENT_COMPOUND,
+	MF_MSG_POISONED_HUGE,
+	MF_MSG_HUGE,
+	MF_MSG_FREE_HUGE,
+	MF_MSG_UNMAP_FAILED,
+	MF_MSG_DIRTY_SWAPCACHE,
+	MF_MSG_CLEAN_SWAPCACHE,
+	MF_MSG_DIRTY_MLOCKED_LRU,
+	MF_MSG_CLEAN_MLOCKED_LRU,
+	MF_MSG_DIRTY_UNEVICTABLE_LRU,
+	MF_MSG_CLEAN_UNEVICTABLE_LRU,
+	MF_MSG_DIRTY_LRU,
+	MF_MSG_CLEAN_LRU,
+	MF_MSG_TRUNCATED_LRU,
+	MF_MSG_BUDDY,
+	MF_MSG_BUDDY_2ND,
+	MF_MSG_UNKNOWN,
+};
+
 #if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLBFS)
 extern void clear_huge_page(struct page *page,
 			    unsigned long addr,
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index d9359b7..6f5748d 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -503,68 +503,34 @@ static void collect_procs(struct page *page, struct list_head *tokill,
 	kfree(tk);
 }
 
-/*
- * Error handlers for various types of pages.
- */
-
-enum outcome {
-	IGNORED,	/* Error: cannot be handled */
-	FAILED,		/* Error: handling failed */
-	DELAYED,	/* Will be handled later */
-	RECOVERED,	/* Successfully recovered */
-};
-
 static const char *action_name[] = {
-	[IGNORED] = "Ignored",
-	[FAILED] = "Failed",
-	[DELAYED] = "Delayed",
-	[RECOVERED] = "Recovered",
-};
-
-enum action_page_type {
-	MSG_KERNEL,
-	MSG_KERNEL_HIGH_ORDER,
-	MSG_SLAB,
-	MSG_DIFFERENT_COMPOUND,
-	MSG_POISONED_HUGE,
-	MSG_HUGE,
-	MSG_FREE_HUGE,
-	MSG_UNMAP_FAILED,
-	MSG_DIRTY_SWAPCACHE,
-	MSG_CLEAN_SWAPCACHE,
-	MSG_DIRTY_MLOCKED_LRU,
-	MSG_CLEAN_MLOCKED_LRU,
-	MSG_DIRTY_UNEVICTABLE_LRU,
-	MSG_CLEAN_UNEVICTABLE_LRU,
-	MSG_DIRTY_LRU,
-	MSG_CLEAN_LRU,
-	MSG_TRUNCATED_LRU,
-	MSG_BUDDY,
-	MSG_BUDDY_2ND,
-	MSG_UNKNOWN,
+	[MF_IGNORED] = "Ignored",
+	[MF_FAILED] = "Failed",
+	[MF_DELAYED] = "Delayed",
+	[MF_RECOVERED] = "Recovered",
 };
 
 static const char * const action_page_types[] = {
-	[MSG_KERNEL]			= "reserved kernel page",
-	[MSG_KERNEL_HIGH_ORDER]		= "high-order kernel page",
-	[MSG_SLAB]			= "kernel slab page",
-	[MSG_DIFFERENT_COMPOUND]	= "different compound page after locking",
-	[MSG_POISONED_HUGE]		= "huge page already hardware poisoned",
-	[MSG_HUGE]			= "huge page",
-	[MSG_FREE_HUGE]			= "free huge page",
-	[MSG_UNMAP_FAILED]		= "unmapping failed page",
-	[MSG_DIRTY_SWAPCACHE]		= "dirty swapcache page",
-	[MSG_CLEAN_SWAPCACHE]		= "clean swapcache page",
-	[MSG_DIRTY_MLOCKED_LRU]		= "dirty mlocked LRU page",
-	[MSG_CLEAN_MLOCKED_LRU]		= "clean mlocked LRU page",
-	[MSG_DIRTY_UNEVICTABLE_LRU]	= "dirty unevictable LRU page",
-	[MSG_CLEAN_UNEVICTABLE_LRU]	= "clean unevictable LRU page",
-	[MSG_DIRTY_LRU]			= "dirty LRU page",
-	[MSG_CLEAN_LRU]			= "clean LRU page",
-	[MSG_TRUNCATED_LRU]		= "already truncated LRU page",
-	[MSG_BUDDY]			= "free buddy page",
-	[MSG_BUDDY_2ND]			= "free buddy page (2nd try)",
-	[MSG_UNKNOWN]			= "unknown page",
+	[MF_MSG_KERNEL]			= "reserved kernel page",
+	[MF_MSG_KERNEL_HIGH_ORDER]	= "high-order kernel page",
+	[MF_MSG_SLAB]			= "kernel slab page",
+	[MF_MSG_DIFFERENT_COMPOUND]	= "different compound page after locking",
+	[MF_MSG_POISONED_HUGE]		= "huge page already hardware poisoned",
+	[MF_MSG_HUGE]			= "huge page",
+	[MF_MSG_FREE_HUGE]		= "free huge page",
+	[MF_MSG_UNMAP_FAILED]		= "unmapping failed page",
+	[MF_MSG_DIRTY_SWAPCACHE]	= "dirty swapcache page",
+	[MF_MSG_CLEAN_SWAPCACHE]	= "clean swapcache page",
+	[MF_MSG_DIRTY_MLOCKED_LRU]	= "dirty mlocked LRU page",
+	[MF_MSG_CLEAN_MLOCKED_LRU]	= "clean mlocked LRU page",
+	[MF_MSG_DIRTY_UNEVICTABLE_LRU]	= "dirty unevictable LRU page",
+	[MF_MSG_CLEAN_UNEVICTABLE_LRU]	= "clean unevictable LRU page",
+	[MF_MSG_DIRTY_LRU]		= "dirty LRU page",
+	[MF_MSG_CLEAN_LRU]		= "clean LRU page",
+	[MF_MSG_TRUNCATED_LRU]		= "already truncated LRU page",
+	[MF_MSG_BUDDY]			= "free buddy page",
+	[MF_MSG_BUDDY_2ND]		= "free buddy page (2nd try)",
+	[MF_MSG_UNKNOWN]		= "unknown page",
 };
 
 /*
@@ -598,7 +564,7 @@ static int delete_from_lru_cache(struct page *p)
  */
 static int me_kernel(struct page *p, unsigned long pfn)
 {
-	return IGNORED;
+	return MF_IGNORED;
 }
 
 /*
@@ -607,7 +573,7 @@ static int me_kernel(struct page *p, unsigned long pfn)
 static int me_unknown(struct page *p, unsigned long pfn)
 {
 	printk(KERN_ERR "MCE %#lx: Unknown page state\n", pfn);
-	return FAILED;
+	return MF_FAILED;
 }
 
 /*
@@ -616,7 +582,7 @@ static int me_unknown(struct page *p, unsigned long pfn)
 static int me_pagecache_clean(struct page *p, unsigned long pfn)
 {
 	int err;
-	int ret = FAILED;
+	int ret = MF_FAILED;
 	struct address_space *mapping;
 
 	delete_from_lru_cache(p);
@@ -626,7 +592,7 @@ static int me_pagecache_clean(struct page *p, unsigned long pfn)
 	 * should be the one m_f() holds.
 	 */
 	if (PageAnon(p))
-		return RECOVERED;
+		return MF_RECOVERED;
 
 	/*
 	 * Now truncate the page in the page cache. This is really
@@ -640,7 +606,7 @@ static int me_pagecache_clean(struct page *p, unsigned long pfn)
 		/*
 		 * Page has been teared down in the meanwhile
 		 */
-		return FAILED;
+		return MF_FAILED;
 	}
 
 	/*
@@ -657,7 +623,7 @@ static int me_pagecache_clean(struct page *p, unsigned long pfn)
 				!try_to_release_page(p, GFP_NOIO)) {
 			pr_info("MCE %#lx: failed to release buffers\n", pfn);
 		} else {
-			ret = RECOVERED;
+			ret = MF_RECOVERED;
 		}
 	} else {
 		/*
@@ -665,7 +631,7 @@ static int me_pagecache_clean(struct page *p, unsigned long pfn)
 		 * This fails on dirty or anything with private pages
 		 */
 		if (invalidate_inode_page(p))
-			ret = RECOVERED;
+			ret = MF_RECOVERED;
 		else
 			printk(KERN_INFO "MCE %#lx: Failed to invalidate\n",
 				pfn);
@@ -751,9 +717,9 @@ static int me_swapcache_dirty(struct page *p, unsigned long pfn)
 	ClearPageUptodate(p);
 
 	if (!delete_from_lru_cache(p))
-		return DELAYED;
+		return MF_DELAYED;
 	else
-		return FAILED;
+		return MF_FAILED;
 }
 
 static int me_swapcache_clean(struct page *p, unsigned long pfn)
@@ -761,9 +727,9 @@ static int me_swapcache_clean(struct page *p, unsigned long pfn)
 	delete_from_swap_cache(p);
 
 	if (!delete_from_lru_cache(p))
-		return RECOVERED;
+		return MF_RECOVERED;
 	else
-		return FAILED;
+		return MF_FAILED;
 }
 
 /*
@@ -789,9 +755,9 @@ static int me_huge_page(struct page *p, unsigned long pfn)
 	if (!(page_mapping(hpage) || PageAnon(hpage))) {
 		res = dequeue_hwpoisoned_huge_page(hpage);
 		if (!res)
-			return RECOVERED;
+			return MF_RECOVERED;
 	}
-	return DELAYED;
+	return MF_DELAYED;
 }
 
 /*
@@ -823,10 +789,10 @@ static int me_huge_page(struct page *p, unsigned long pfn)
 static struct page_state {
 	unsigned long mask;
 	unsigned long res;
-	enum action_page_type type;
+	enum mf_action_page_type type;
 	int (*action)(struct page *p, unsigned long pfn);
 } error_states[] = {
-	{ reserved,	reserved,	MSG_KERNEL,	me_kernel },
+	{ reserved,	reserved,	MF_MSG_KERNEL,	me_kernel },
 	/*
 	 * free pages are specially detected outside this table:
 	 * PG_buddy pages only make a small fraction of all free pages.
@@ -837,31 +803,31 @@ static struct page_state {
 	 * currently unused objects without touching them. But just
 	 * treat it as standard kernel for now.
 	 */
-	{ slab,		slab,		MSG_SLAB,	me_kernel },
+	{ slab,		slab,		MF_MSG_SLAB,	me_kernel },
 
 #ifdef CONFIG_PAGEFLAGS_EXTENDED
-	{ head,		head,		MSG_HUGE,		me_huge_page },
-	{ tail,		tail,		MSG_HUGE,		me_huge_page },
+	{ head,		head,		MF_MSG_HUGE,		me_huge_page },
+	{ tail,		tail,		MF_MSG_HUGE,		me_huge_page },
 #else
-	{ compound,	compound,	MSG_HUGE,		me_huge_page },
+	{ compound,	compound,	MF_MSG_HUGE,		me_huge_page },
 #endif
 
-	{ sc|dirty,	sc|dirty,	MSG_DIRTY_SWAPCACHE,	me_swapcache_dirty },
-	{ sc|dirty,	sc,		MSG_CLEAN_SWAPCACHE,	me_swapcache_clean },
+	{ sc|dirty,	sc|dirty,	MF_MSG_DIRTY_SWAPCACHE,	me_swapcache_dirty },
+	{ sc|dirty,	sc,		MF_MSG_CLEAN_SWAPCACHE,	me_swapcache_clean },
 
-	{ mlock|dirty,	mlock|dirty,	MSG_DIRTY_MLOCKED_LRU,	me_pagecache_dirty },
-	{ mlock|dirty,	mlock,		MSG_CLEAN_MLOCKED_LRU,	me_pagecache_clean },
+	{ mlock|dirty,	mlock|dirty,	MF_MSG_DIRTY_MLOCKED_LRU,	me_pagecache_dirty },
+	{ mlock|dirty,	mlock,		MF_MSG_CLEAN_MLOCKED_LRU,	me_pagecache_clean },
 
-	{ unevict|dirty, unevict|dirty,	MSG_DIRTY_UNEVICTABLE_LRU,	me_pagecache_dirty },
-	{ unevict|dirty, unevict,	MSG_CLEAN_UNEVICTABLE_LRU,	me_pagecache_clean },
+	{ unevict|dirty, unevict|dirty,	MF_MSG_DIRTY_UNEVICTABLE_LRU,	me_pagecache_dirty },
+	{ unevict|dirty, unevict,	MF_MSG_CLEAN_UNEVICTABLE_LRU,	me_pagecache_clean },
 
-	{ lru|dirty,	lru|dirty,	MSG_DIRTY_LRU,	me_pagecache_dirty },
-	{ lru|dirty,	lru,		MSG_CLEAN_LRU,	me_pagecache_clean },
+	{ lru|dirty,	lru|dirty,	MF_MSG_DIRTY_LRU,	me_pagecache_dirty },
+	{ lru|dirty,	lru,		MF_MSG_CLEAN_LRU,	me_pagecache_clean },
 
 	/*
 	 * Catchall entry: must be at end.
 	 */
-	{ 0,		0,		MSG_UNKNOWN,	me_unknown },
+	{ 0,		0,		MF_MSG_UNKNOWN,	me_unknown },
 };
 
 #undef dirty
@@ -881,7 +847,7 @@ static struct page_state {
  * "Dirty/Clean" indication is not 100% accurate due to the possibility of
  * setting PG_dirty outside page lock. See also comment above set_page_dirty().
  */
-static void action_result(unsigned long pfn, enum action_page_type type, int result)
+static void action_result(unsigned long pfn, enum mf_action_page_type type, int result)
 {
 	pr_err("MCE %#lx: recovery action for %s: %s\n",
 		pfn, action_page_types[type], action_name[result]);
@@ -896,13 +862,13 @@ static int page_action(struct page_state *ps, struct page *p,
 	result = ps->action(p, pfn);
 
 	count = page_count(p) - 1;
-	if (ps->action == me_swapcache_dirty && result == DELAYED)
+	if (ps->action == me_swapcache_dirty && result == MF_DELAYED)
 		count--;
 	if (count != 0) {
 		printk(KERN_ERR
 		       "MCE %#lx: %s still referenced by %d users\n",
 		       pfn, action_page_types[ps->type], count);
-		result = FAILED;
+		result = MF_FAILED;
 	}
 	action_result(pfn, ps->type, result);
 
@@ -911,7 +877,7 @@ static int page_action(struct page_state *ps, struct page *p,
 	 * Could adjust zone counters here to correct for the missing page.
 	 */
 
-	return (result == RECOVERED || result == DELAYED) ? 0 : -EBUSY;
+	return (result == MF_RECOVERED || result == MF_DELAYED) ? 0 : -EBUSY;
 }
 
 /*
@@ -1152,7 +1118,7 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
 	if (!(flags & MF_COUNT_INCREASED) &&
 		!get_page_unless_zero(hpage)) {
 		if (is_free_buddy_page(p)) {
-			action_result(pfn, MSG_BUDDY, DELAYED);
+			action_result(pfn, MF_MSG_BUDDY, MF_DELAYED);
 			return 0;
 		} else if (PageHuge(hpage)) {
 			/*
@@ -1169,12 +1135,12 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
 			}
 			set_page_hwpoison_huge_page(hpage);
 			res = dequeue_hwpoisoned_huge_page(hpage);
-			action_result(pfn, MSG_FREE_HUGE,
-				      res ? IGNORED : DELAYED);
+			action_result(pfn, MF_MSG_FREE_HUGE,
+				      res ? MF_IGNORED : MF_DELAYED);
 			unlock_page(hpage);
 			return res;
 		} else {
-			action_result(pfn, MSG_KERNEL_HIGH_ORDER, IGNORED);
+			action_result(pfn, MF_MSG_KERNEL_HIGH_ORDER, MF_IGNORED);
 			return -EBUSY;
 		}
 	}
@@ -1196,10 +1162,10 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
 			 */
 			if (is_free_buddy_page(p)) {
 				if (flags & MF_COUNT_INCREASED)
-					action_result(pfn, MSG_BUDDY, DELAYED);
+					action_result(pfn, MF_MSG_BUDDY, MF_DELAYED);
 				else
-					action_result(pfn, MSG_BUDDY_2ND,
-						      DELAYED);
+					action_result(pfn, MF_MSG_BUDDY_2ND,
+						      MF_DELAYED);
 				return 0;
 			}
 		}
@@ -1212,7 +1178,7 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
 	 * If this happens just bail out.
 	 */
 	if (compound_head(p) != hpage) {
-		action_result(pfn, MSG_DIFFERENT_COMPOUND, IGNORED);
+		action_result(pfn, MF_MSG_DIFFERENT_COMPOUND, MF_IGNORED);
 		res = -EBUSY;
 		goto out;
 	}
@@ -1252,7 +1218,7 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
 	 * on the head page to show that the hugepage is hwpoisoned
 	 */
 	if (PageHuge(p) && PageTail(p) && TestSetPageHWPoison(hpage)) {
-		action_result(pfn, MSG_POISONED_HUGE, IGNORED);
+		action_result(pfn, MF_MSG_POISONED_HUGE, MF_IGNORED);
 		unlock_page(hpage);
 		put_page(hpage);
 		return 0;
@@ -1281,7 +1247,7 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
 	 */
 	if (hwpoison_user_mappings(p, pfn, trapno, flags, &hpage)
 	    != SWAP_SUCCESS) {
-		action_result(pfn, MSG_UNMAP_FAILED, IGNORED);
+		action_result(pfn, MF_MSG_UNMAP_FAILED, MF_IGNORED);
 		res = -EBUSY;
 		goto out;
 	}
@@ -1290,7 +1256,7 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
 	 * Torn down by someone else?
 	 */
 	if (PageLRU(p) && !PageSwapCache(p) && p->mapping == NULL) {
-		action_result(pfn, MSG_TRUNCATED_LRU, IGNORED);
+		action_result(pfn, MF_MSG_TRUNCATED_LRU, MF_IGNORED);
 		res = -EBUSY;
 		goto out;
 	}
-- 
1.8.3.1

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Re: [PATCH v4 1/3] memory-failure: export page_type and action result

[Naoya Horiguchi]

On Mon, Apr 20, 2015 at 04:44:38PM +0800, Xie XiuQi wrote:
> Export 'outcome' and 'action_page_type' to mm.h, so we could use
> this enums outside.
> 
> This patch is preparation for adding trace events for memory-failure
> recovery action.
> 
> Signed-off-by: Xie XiuQi <xiexiuqi@huawei.com>

Acked-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>

> ---
>  include/linux/mm.h  |  34 +++++++++++
>  mm/memory-failure.c | 168 +++++++++++++++++++++-------------------------------
>  2 files changed, 101 insertions(+), 101 deletions(-)
> 
> diff --git a/include/linux/mm.h b/include/linux/mm.h
> index 8b08607..8413615 100644
> --- a/include/linux/mm.h
> +++ b/include/linux/mm.h
> @@ -2152,6 +2152,40 @@ extern void shake_page(struct page *p, int access);
>  extern atomic_long_t num_poisoned_pages;
>  extern int soft_offline_page(struct page *page, int flags);
>  
> +
> +/*
> + * Error handlers for various types of pages.
> + */
> +enum mf_outcome {
> +	MF_IGNORED,	/* Error: cannot be handled */
> +	MF_FAILED,	/* Error: handling failed */
> +	MF_DELAYED,	/* Will be handled later */
> +	MF_RECOVERED,	/* Successfully recovered */
> +};
> +
> +enum mf_action_page_type {
> +	MF_MSG_KERNEL,
> +	MF_MSG_KERNEL_HIGH_ORDER,
> +	MF_MSG_SLAB,
> +	MF_MSG_DIFFERENT_COMPOUND,
> +	MF_MSG_POISONED_HUGE,
> +	MF_MSG_HUGE,
> +	MF_MSG_FREE_HUGE,
> +	MF_MSG_UNMAP_FAILED,
> +	MF_MSG_DIRTY_SWAPCACHE,
> +	MF_MSG_CLEAN_SWAPCACHE,
> +	MF_MSG_DIRTY_MLOCKED_LRU,
> +	MF_MSG_CLEAN_MLOCKED_LRU,
> +	MF_MSG_DIRTY_UNEVICTABLE_LRU,
> +	MF_MSG_CLEAN_UNEVICTABLE_LRU,
> +	MF_MSG_DIRTY_LRU,
> +	MF_MSG_CLEAN_LRU,
> +	MF_MSG_TRUNCATED_LRU,
> +	MF_MSG_BUDDY,
> +	MF_MSG_BUDDY_2ND,
> +	MF_MSG_UNKNOWN,
> +};
> +
>  #if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLBFS)
>  extern void clear_huge_page(struct page *page,
>  			    unsigned long addr,
> diff --git a/mm/memory-failure.c b/mm/memory-failure.c
> index d9359b7..6f5748d 100644
> --- a/mm/memory-failure.c
> +++ b/mm/memory-failure.c
> @@ -503,68 +503,34 @@ static void collect_procs(struct page *page, struct list_head *tokill,
>  	kfree(tk);
>  }
>  
> -/*
> - * Error handlers for various types of pages.
> - */
> -
> -enum outcome {
> -	IGNORED,	/* Error: cannot be handled */
> -	FAILED,		/* Error: handling failed */
> -	DELAYED,	/* Will be handled later */
> -	RECOVERED,	/* Successfully recovered */
> -};
> -
>  static const char *action_name[] = {
> -	[IGNORED] = "Ignored",
> -	[FAILED] = "Failed",
> -	[DELAYED] = "Delayed",
> -	[RECOVERED] = "Recovered",
> -};
> -
> -enum action_page_type {
> -	MSG_KERNEL,
> -	MSG_KERNEL_HIGH_ORDER,
> -	MSG_SLAB,
> -	MSG_DIFFERENT_COMPOUND,
> -	MSG_POISONED_HUGE,
> -	MSG_HUGE,
> -	MSG_FREE_HUGE,
> -	MSG_UNMAP_FAILED,
> -	MSG_DIRTY_SWAPCACHE,
> -	MSG_CLEAN_SWAPCACHE,
> -	MSG_DIRTY_MLOCKED_LRU,
> -	MSG_CLEAN_MLOCKED_LRU,
> -	MSG_DIRTY_UNEVICTABLE_LRU,
> -	MSG_CLEAN_UNEVICTABLE_LRU,
> -	MSG_DIRTY_LRU,
> -	MSG_CLEAN_LRU,
> -	MSG_TRUNCATED_LRU,
> -	MSG_BUDDY,
> -	MSG_BUDDY_2ND,
> -	MSG_UNKNOWN,
> +	[MF_IGNORED] = "Ignored",
> +	[MF_FAILED] = "Failed",
> +	[MF_DELAYED] = "Delayed",
> +	[MF_RECOVERED] = "Recovered",
>  };
>  
>  static const char * const action_page_types[] = {
> -	[MSG_KERNEL]			= "reserved kernel page",
> -	[MSG_KERNEL_HIGH_ORDER]		= "high-order kernel page",
> -	[MSG_SLAB]			= "kernel slab page",
> -	[MSG_DIFFERENT_COMPOUND]	= "different compound page after locking",
> -	[MSG_POISONED_HUGE]		= "huge page already hardware poisoned",
> -	[MSG_HUGE]			= "huge page",
> -	[MSG_FREE_HUGE]			= "free huge page",
> -	[MSG_UNMAP_FAILED]		= "unmapping failed page",
> -	[MSG_DIRTY_SWAPCACHE]		= "dirty swapcache page",
> -	[MSG_CLEAN_SWAPCACHE]		= "clean swapcache page",
> -	[MSG_DIRTY_MLOCKED_LRU]		= "dirty mlocked LRU page",
> -	[MSG_CLEAN_MLOCKED_LRU]		= "clean mlocked LRU page",
> -	[MSG_DIRTY_UNEVICTABLE_LRU]	= "dirty unevictable LRU page",
> -	[MSG_CLEAN_UNEVICTABLE_LRU]	= "clean unevictable LRU page",
> -	[MSG_DIRTY_LRU]			= "dirty LRU page",
> -	[MSG_CLEAN_LRU]			= "clean LRU page",
> -	[MSG_TRUNCATED_LRU]		= "already truncated LRU page",
> -	[MSG_BUDDY]			= "free buddy page",
> -	[MSG_BUDDY_2ND]			= "free buddy page (2nd try)",
> -	[MSG_UNKNOWN]			= "unknown page",
> +	[MF_MSG_KERNEL]			= "reserved kernel page",
> +	[MF_MSG_KERNEL_HIGH_ORDER]	= "high-order kernel page",
> +	[MF_MSG_SLAB]			= "kernel slab page",
> +	[MF_MSG_DIFFERENT_COMPOUND]	= "different compound page after locking",
> +	[MF_MSG_POISONED_HUGE]		= "huge page already hardware poisoned",
> +	[MF_MSG_HUGE]			= "huge page",
> +	[MF_MSG_FREE_HUGE]		= "free huge page",
> +	[MF_MSG_UNMAP_FAILED]		= "unmapping failed page",
> +	[MF_MSG_DIRTY_SWAPCACHE]	= "dirty swapcache page",
> +	[MF_MSG_CLEAN_SWAPCACHE]	= "clean swapcache page",
> +	[MF_MSG_DIRTY_MLOCKED_LRU]	= "dirty mlocked LRU page",
> +	[MF_MSG_CLEAN_MLOCKED_LRU]	= "clean mlocked LRU page",
> +	[MF_MSG_DIRTY_UNEVICTABLE_LRU]	= "dirty unevictable LRU page",
> +	[MF_MSG_CLEAN_UNEVICTABLE_LRU]	= "clean unevictable LRU page",
> +	[MF_MSG_DIRTY_LRU]		= "dirty LRU page",
> +	[MF_MSG_CLEAN_LRU]		= "clean LRU page",
> +	[MF_MSG_TRUNCATED_LRU]		= "already truncated LRU page",
> +	[MF_MSG_BUDDY]			= "free buddy page",
> +	[MF_MSG_BUDDY_2ND]		= "free buddy page (2nd try)",
> +	[MF_MSG_UNKNOWN]		= "unknown page",
>  };
>  
>  /*
> @@ -598,7 +564,7 @@ static int delete_from_lru_cache(struct page *p)
>   */
>  static int me_kernel(struct page *p, unsigned long pfn)
>  {
> -	return IGNORED;
> +	return MF_IGNORED;
>  }
>  
>  /*
> @@ -607,7 +573,7 @@ static int me_kernel(struct page *p, unsigned long pfn)
>  static int me_unknown(struct page *p, unsigned long pfn)
>  {
>  	printk(KERN_ERR "MCE %#lx: Unknown page state\n", pfn);
> -	return FAILED;
> +	return MF_FAILED;
>  }
>  
>  /*
> @@ -616,7 +582,7 @@ static int me_unknown(struct page *p, unsigned long pfn)
>  static int me_pagecache_clean(struct page *p, unsigned long pfn)
>  {
>  	int err;
> -	int ret = FAILED;
> +	int ret = MF_FAILED;
>  	struct address_space *mapping;
>  
>  	delete_from_lru_cache(p);
> @@ -626,7 +592,7 @@ static int me_pagecache_clean(struct page *p, unsigned long pfn)
>  	 * should be the one m_f() holds.
>  	 */
>  	if (PageAnon(p))
> -		return RECOVERED;
> +		return MF_RECOVERED;
>  
>  	/*
>  	 * Now truncate the page in the page cache. This is really
> @@ -640,7 +606,7 @@ static int me_pagecache_clean(struct page *p, unsigned long pfn)
>  		/*
>  		 * Page has been teared down in the meanwhile
>  		 */
> -		return FAILED;
> +		return MF_FAILED;
>  	}
>  
>  	/*
> @@ -657,7 +623,7 @@ static int me_pagecache_clean(struct page *p, unsigned long pfn)
>  				!try_to_release_page(p, GFP_NOIO)) {
>  			pr_info("MCE %#lx: failed to release buffers\n", pfn);
>  		} else {
> -			ret = RECOVERED;
> +			ret = MF_RECOVERED;
>  		}
>  	} else {
>  		/*
> @@ -665,7 +631,7 @@ static int me_pagecache_clean(struct page *p, unsigned long pfn)
>  		 * This fails on dirty or anything with private pages
>  		 */
>  		if (invalidate_inode_page(p))
> -			ret = RECOVERED;
> +			ret = MF_RECOVERED;
>  		else
>  			printk(KERN_INFO "MCE %#lx: Failed to invalidate\n",
>  				pfn);
> @@ -751,9 +717,9 @@ static int me_swapcache_dirty(struct page *p, unsigned long pfn)
>  	ClearPageUptodate(p);
>  
>  	if (!delete_from_lru_cache(p))
> -		return DELAYED;
> +		return MF_DELAYED;
>  	else
> -		return FAILED;
> +		return MF_FAILED;
>  }
>  
>  static int me_swapcache_clean(struct page *p, unsigned long pfn)
> @@ -761,9 +727,9 @@ static int me_swapcache_clean(struct page *p, unsigned long pfn)
>  	delete_from_swap_cache(p);
>  
>  	if (!delete_from_lru_cache(p))
> -		return RECOVERED;
> +		return MF_RECOVERED;
>  	else
> -		return FAILED;
> +		return MF_FAILED;
>  }
>  
>  /*
> @@ -789,9 +755,9 @@ static int me_huge_page(struct page *p, unsigned long pfn)
>  	if (!(page_mapping(hpage) || PageAnon(hpage))) {
>  		res = dequeue_hwpoisoned_huge_page(hpage);
>  		if (!res)
> -			return RECOVERED;
> +			return MF_RECOVERED;
>  	}
> -	return DELAYED;
> +	return MF_DELAYED;
>  }
>  
>  /*
> @@ -823,10 +789,10 @@ static int me_huge_page(struct page *p, unsigned long pfn)
>  static struct page_state {
>  	unsigned long mask;
>  	unsigned long res;
> -	enum action_page_type type;
> +	enum mf_action_page_type type;
>  	int (*action)(struct page *p, unsigned long pfn);
>  } error_states[] = {
> -	{ reserved,	reserved,	MSG_KERNEL,	me_kernel },
> +	{ reserved,	reserved,	MF_MSG_KERNEL,	me_kernel },
>  	/*
>  	 * free pages are specially detected outside this table:
>  	 * PG_buddy pages only make a small fraction of all free pages.
> @@ -837,31 +803,31 @@ static struct page_state {
>  	 * currently unused objects without touching them. But just
>  	 * treat it as standard kernel for now.
>  	 */
> -	{ slab,		slab,		MSG_SLAB,	me_kernel },
> +	{ slab,		slab,		MF_MSG_SLAB,	me_kernel },
>  
>  #ifdef CONFIG_PAGEFLAGS_EXTENDED
> -	{ head,		head,		MSG_HUGE,		me_huge_page },
> -	{ tail,		tail,		MSG_HUGE,		me_huge_page },
> +	{ head,		head,		MF_MSG_HUGE,		me_huge_page },
> +	{ tail,		tail,		MF_MSG_HUGE,		me_huge_page },
>  #else
> -	{ compound,	compound,	MSG_HUGE,		me_huge_page },
> +	{ compound,	compound,	MF_MSG_HUGE,		me_huge_page },
>  #endif
>  
> -	{ sc|dirty,	sc|dirty,	MSG_DIRTY_SWAPCACHE,	me_swapcache_dirty },
> -	{ sc|dirty,	sc,		MSG_CLEAN_SWAPCACHE,	me_swapcache_clean },
> +	{ sc|dirty,	sc|dirty,	MF_MSG_DIRTY_SWAPCACHE,	me_swapcache_dirty },
> +	{ sc|dirty,	sc,		MF_MSG_CLEAN_SWAPCACHE,	me_swapcache_clean },
>  
> -	{ mlock|dirty,	mlock|dirty,	MSG_DIRTY_MLOCKED_LRU,	me_pagecache_dirty },
> -	{ mlock|dirty,	mlock,		MSG_CLEAN_MLOCKED_LRU,	me_pagecache_clean },
> +	{ mlock|dirty,	mlock|dirty,	MF_MSG_DIRTY_MLOCKED_LRU,	me_pagecache_dirty },
> +	{ mlock|dirty,	mlock,		MF_MSG_CLEAN_MLOCKED_LRU,	me_pagecache_clean },
>  
> -	{ unevict|dirty, unevict|dirty,	MSG_DIRTY_UNEVICTABLE_LRU,	me_pagecache_dirty },
> -	{ unevict|dirty, unevict,	MSG_CLEAN_UNEVICTABLE_LRU,	me_pagecache_clean },
> +	{ unevict|dirty, unevict|dirty,	MF_MSG_DIRTY_UNEVICTABLE_LRU,	me_pagecache_dirty },
> +	{ unevict|dirty, unevict,	MF_MSG_CLEAN_UNEVICTABLE_LRU,	me_pagecache_clean },
>  
> -	{ lru|dirty,	lru|dirty,	MSG_DIRTY_LRU,	me_pagecache_dirty },
> -	{ lru|dirty,	lru,		MSG_CLEAN_LRU,	me_pagecache_clean },
> +	{ lru|dirty,	lru|dirty,	MF_MSG_DIRTY_LRU,	me_pagecache_dirty },
> +	{ lru|dirty,	lru,		MF_MSG_CLEAN_LRU,	me_pagecache_clean },
>  
>  	/*
>  	 * Catchall entry: must be at end.
>  	 */
> -	{ 0,		0,		MSG_UNKNOWN,	me_unknown },
> +	{ 0,		0,		MF_MSG_UNKNOWN,	me_unknown },
>  };
>  
>  #undef dirty
> @@ -881,7 +847,7 @@ static struct page_state {
>   * "Dirty/Clean" indication is not 100% accurate due to the possibility of
>   * setting PG_dirty outside page lock. See also comment above set_page_dirty().
>   */
> -static void action_result(unsigned long pfn, enum action_page_type type, int result)
> +static void action_result(unsigned long pfn, enum mf_action_page_type type, int result)
>  {
>  	pr_err("MCE %#lx: recovery action for %s: %s\n",
>  		pfn, action_page_types[type], action_name[result]);
> @@ -896,13 +862,13 @@ static int page_action(struct page_state *ps, struct page *p,
>  	result = ps->action(p, pfn);
>  
>  	count = page_count(p) - 1;
> -	if (ps->action == me_swapcache_dirty && result == DELAYED)
> +	if (ps->action == me_swapcache_dirty && result == MF_DELAYED)
>  		count--;
>  	if (count != 0) {
>  		printk(KERN_ERR
>  		       "MCE %#lx: %s still referenced by %d users\n",
>  		       pfn, action_page_types[ps->type], count);
> -		result = FAILED;
> +		result = MF_FAILED;
>  	}
>  	action_result(pfn, ps->type, result);
>  
> @@ -911,7 +877,7 @@ static int page_action(struct page_state *ps, struct page *p,
>  	 * Could adjust zone counters here to correct for the missing page.
>  	 */
>  
> -	return (result == RECOVERED || result == DELAYED) ? 0 : -EBUSY;
> +	return (result == MF_RECOVERED || result == MF_DELAYED) ? 0 : -EBUSY;
>  }
>  
>  /*
> @@ -1152,7 +1118,7 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
>  	if (!(flags & MF_COUNT_INCREASED) &&
>  		!get_page_unless_zero(hpage)) {
>  		if (is_free_buddy_page(p)) {
> -			action_result(pfn, MSG_BUDDY, DELAYED);
> +			action_result(pfn, MF_MSG_BUDDY, MF_DELAYED);
>  			return 0;
>  		} else if (PageHuge(hpage)) {
>  			/*
> @@ -1169,12 +1135,12 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
>  			}
>  			set_page_hwpoison_huge_page(hpage);
>  			res = dequeue_hwpoisoned_huge_page(hpage);
> -			action_result(pfn, MSG_FREE_HUGE,
> -				      res ? IGNORED : DELAYED);
> +			action_result(pfn, MF_MSG_FREE_HUGE,
> +				      res ? MF_IGNORED : MF_DELAYED);
>  			unlock_page(hpage);
>  			return res;
>  		} else {
> -			action_result(pfn, MSG_KERNEL_HIGH_ORDER, IGNORED);
> +			action_result(pfn, MF_MSG_KERNEL_HIGH_ORDER, MF_IGNORED);
>  			return -EBUSY;
>  		}
>  	}
> @@ -1196,10 +1162,10 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
>  			 */
>  			if (is_free_buddy_page(p)) {
>  				if (flags & MF_COUNT_INCREASED)
> -					action_result(pfn, MSG_BUDDY, DELAYED);
> +					action_result(pfn, MF_MSG_BUDDY, MF_DELAYED);
>  				else
> -					action_result(pfn, MSG_BUDDY_2ND,
> -						      DELAYED);
> +					action_result(pfn, MF_MSG_BUDDY_2ND,
> +						      MF_DELAYED);
>  				return 0;
>  			}
>  		}
> @@ -1212,7 +1178,7 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
>  	 * If this happens just bail out.
>  	 */
>  	if (compound_head(p) != hpage) {
> -		action_result(pfn, MSG_DIFFERENT_COMPOUND, IGNORED);
> +		action_result(pfn, MF_MSG_DIFFERENT_COMPOUND, MF_IGNORED);
>  		res = -EBUSY;
>  		goto out;
>  	}
> @@ -1252,7 +1218,7 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
>  	 * on the head page to show that the hugepage is hwpoisoned
>  	 */
>  	if (PageHuge(p) && PageTail(p) && TestSetPageHWPoison(hpage)) {
> -		action_result(pfn, MSG_POISONED_HUGE, IGNORED);
> +		action_result(pfn, MF_MSG_POISONED_HUGE, MF_IGNORED);
>  		unlock_page(hpage);
>  		put_page(hpage);
>  		return 0;
> @@ -1281,7 +1247,7 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
>  	 */
>  	if (hwpoison_user_mappings(p, pfn, trapno, flags, &hpage)
>  	    != SWAP_SUCCESS) {
> -		action_result(pfn, MSG_UNMAP_FAILED, IGNORED);
> +		action_result(pfn, MF_MSG_UNMAP_FAILED, MF_IGNORED);
>  		res = -EBUSY;
>  		goto out;
>  	}
> @@ -1290,7 +1256,7 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
>  	 * Torn down by someone else?
>  	 */
>  	if (PageLRU(p) && !PageSwapCache(p) && p->mapping == NULL) {
> -		action_result(pfn, MSG_TRUNCATED_LRU, IGNORED);
> +		action_result(pfn, MF_MSG_TRUNCATED_LRU, MF_IGNORED);
>  		res = -EBUSY;
>  		goto out;
>  	}
> -- 
> 1.8.3.1
> 
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[PATCH v4 2/3] memory-failure: change type of action_result's param 3 to enum

[Xie XiuQi]

Change type of action_result's param 3 to enum for type consistency,
and rename mf_outcome to mf_result for clearly.

Signed-off-by: Xie XiuQi <xiexiuqi@huawei.com>
---
 include/linux/mm.h  | 2 +-
 mm/memory-failure.c | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 8413615..93c4a00 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2156,7 +2156,7 @@ extern int soft_offline_page(struct page *page, int flags);
 /*
  * Error handlers for various types of pages.
  */
-enum mf_outcome {
+enum mf_result {
 	MF_IGNORED,	/* Error: cannot be handled */
 	MF_FAILED,	/* Error: handling failed */
 	MF_DELAYED,	/* Will be handled later */
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 6f5748d..f074f8e 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -847,7 +847,8 @@ static struct page_state {
  * "Dirty/Clean" indication is not 100% accurate due to the possibility of
  * setting PG_dirty outside page lock. See also comment above set_page_dirty().
  */
-static void action_result(unsigned long pfn, enum mf_action_page_type type, int result)
+static void action_result(unsigned long pfn, enum mf_action_page_type type,
+			  enum mf_result result)
 {
 	pr_err("MCE %#lx: recovery action for %s: %s\n",
 		pfn, action_page_types[type], action_name[result]);
-- 
1.8.3.1

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Re: [PATCH v4 2/3] memory-failure: change type of action_result's param 3 to enum

[Naoya Horiguchi]

On Mon, Apr 20, 2015 at 04:44:39PM +0800, Xie XiuQi wrote:
> Change type of action_result's param 3 to enum for type consistency,
> and rename mf_outcome to mf_result for clearly.
> 
> Signed-off-by: Xie XiuQi <xiexiuqi@huawei.com>

Acked-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>

> ---
>  include/linux/mm.h  | 2 +-
>  mm/memory-failure.c | 3 ++-
>  2 files changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/include/linux/mm.h b/include/linux/mm.h
> index 8413615..93c4a00 100644
> --- a/include/linux/mm.h
> +++ b/include/linux/mm.h
> @@ -2156,7 +2156,7 @@ extern int soft_offline_page(struct page *page, int flags);
>  /*
>   * Error handlers for various types of pages.
>   */
> -enum mf_outcome {
> +enum mf_result {
>  	MF_IGNORED,	/* Error: cannot be handled */
>  	MF_FAILED,	/* Error: handling failed */
>  	MF_DELAYED,	/* Will be handled later */
> diff --git a/mm/memory-failure.c b/mm/memory-failure.c
> index 6f5748d..f074f8e 100644
> --- a/mm/memory-failure.c
> +++ b/mm/memory-failure.c
> @@ -847,7 +847,8 @@ static struct page_state {
>   * "Dirty/Clean" indication is not 100% accurate due to the possibility of
>   * setting PG_dirty outside page lock. See also comment above set_page_dirty().
>   */
> -static void action_result(unsigned long pfn, enum mf_action_page_type type, int result)
> +static void action_result(unsigned long pfn, enum mf_action_page_type type,
> +			  enum mf_result result)
>  {
>  	pr_err("MCE %#lx: recovery action for %s: %s\n",
>  		pfn, action_page_types[type], action_name[result]);
> -- 
> 1.8.3.1
> 
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[PATCH v4 3/3] tracing: add trace event for memory-failure

[Xie XiuQi]

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

Cc: Tony Luck <tony.luck@intel.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Xie XiuQi <xiexiuqi@huawei.com>
---
 include/ras/ras_event.h | 85 +++++++++++++++++++++++++++++++++++++++++++++++++
 mm/memory-failure.c     |  3 ++
 2 files changed, 88 insertions(+)

diff --git a/include/ras/ras_event.h b/include/ras/ras_event.h
index 79abb9c..258ed89 100644
--- a/include/ras/ras_event.h
+++ b/include/ras/ras_event.h
@@ -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, "Ignord" )	\
+	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 */
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index f074f8e..42c5981 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -56,6 +56,7 @@
 #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;
 
@@ -850,6 +851,8 @@ 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]);
 }
-- 
1.8.3.1

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Re: [PATCH v4 3/3] tracing: add trace event for memory-failure

[Steven Rostedt]

On Mon, 20 Apr 2015 16:44:40 +0800
Xie XiuQi <xiexiuqi@huawei.com> wrote:

> 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
> 
> Cc: Tony Luck <tony.luck@intel.com>
> Cc: Steven Rostedt <rostedt@goodmis.org>
> Signed-off-by: Xie XiuQi <xiexiuqi@huawei.com>

Looks good to me.

Acked-by: Steven Rostedt <rostedt@goodmis.org>

-- Steve

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Re: [PATCH v4 3/3] tracing: add trace event for memory-failure

[Naoya Horiguchi]

On Mon, Apr 20, 2015 at 04:44:40PM +0800, Xie XiuQi wrote:
> 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
> 
> Cc: Tony Luck <tony.luck@intel.com>
> Cc: Steven Rostedt <rostedt@goodmis.org>
> Signed-off-by: Xie XiuQi <xiexiuqi@huawei.com>

Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>

> ---
>  include/ras/ras_event.h | 85 +++++++++++++++++++++++++++++++++++++++++++++++++
>  mm/memory-failure.c     |  3 ++
>  2 files changed, 88 insertions(+)
> 
> diff --git a/include/ras/ras_event.h b/include/ras/ras_event.h
> index 79abb9c..258ed89 100644
> --- a/include/ras/ras_event.h
> +++ b/include/ras/ras_event.h
> @@ -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, "Ignord" )	\
> +	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 */
> diff --git a/mm/memory-failure.c b/mm/memory-failure.c
> index f074f8e..42c5981 100644
> --- a/mm/memory-failure.c
> +++ b/mm/memory-failure.c
> @@ -56,6 +56,7 @@
>  #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;
>  
> @@ -850,6 +851,8 @@ 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]);
>  }
> -- 
> 1.8.3.1
> 
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Re: [PATCH v4 3/3] tracing: add trace event for memory-failure

[Steven Rostedt]

On Mon, 20 Apr 2015 16:44:40 +0800
Xie XiuQi <xiexiuqi@huawei.com> wrote:

> --- a/include/ras/ras_event.h
> +++ b/include/ras/ras_event.h
> @@ -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, "Ignord" )	\

 "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",

Hmm, "%#" is new to me. I'm not sure libtraceevent handles that.

Not your problem, I need to make sure that it does, and if it does not,
I need to fix it.

I'm not even sure what %# does.

Other than the typo,

Acked-by: Steven Rostedt <rostedt@goodmis.org>

-- Steve


> +		__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 */
> diff --git a/mm/memory-failure.c b/mm/memory-failure.c
> index f074f8e..42c5981 100644
> --- a/mm/memory-failure.c
> +++ b/mm/memory-failure.c
> @@ -56,6 +56,7 @@
>  #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;
>  
> @@ -850,6 +851,8 @@ 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]);
>  }

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Re: [PATCH v4 3/3] tracing: add trace event for memory-failure

[Xie XiuQi]

On 2015/5/7 10:25, Steven Rostedt wrote:
> On Mon, 20 Apr 2015 16:44:40 +0800
> Xie XiuQi <xiexiuqi@huawei.com> wrote:
> 

...

>> + *
>> + * 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, "Ignord" )	\
> 
>  "Ignored" ?

My fault, I'll correct it, thanks.

> 
>> +	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" )	\
...
>> +	),
>> +
>> +	TP_fast_assign(
>> +		__entry->pfn	= pfn;
>> +		__entry->type	= type;
>> +		__entry->result	= result;
>> +	),
>> +
>> +	TP_printk("pfn %#lx: recovery action for %s: %s",
> 
> Hmm, "%#" is new to me. I'm not sure libtraceevent handles that.
> 
> Not your problem, I need to make sure that it does, and if it does not,
> I need to fix it.
> 
> I'm not even sure what %# does.
> 
> Other than the typo,
> 
> Acked-by: Steven Rostedt <rostedt@goodmis.org>

Thanks,
	Xie XiuQi

> 
> -- Steve
> 
> 
>> +		__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 */
>> diff --git a/mm/memory-failure.c b/mm/memory-failure.c
>> index f074f8e..42c5981 100644
>> --- a/mm/memory-failure.c
>> +++ b/mm/memory-failure.c
>> @@ -56,6 +56,7 @@
>>  #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;
>>  
>> @@ -850,6 +851,8 @@ 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]);
>>  }
> 
> 
> .
> 


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Re: [PATCH v4 0/3] tracing: add trace event for memory-failure

[Xie XiuQi]

Hi Naoya,

Could you help to review and applied this series if possible.

Thanks,
Xie XiuQi

On 2015/4/20 16:44, Xie XiuQi wrote:
> 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 patchset 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
> 
> --
> v3->v4:
>  - rebase on top of latest linux-next
>  - update comments as Naoya's suggestion
>  - add #ifdef CONFIG_MEMORY_FAILURE for this trace event
>  - change type of action_result's param 3 to enum
> 
> v2->v3:
>  - rebase on top of linux-next
>  - based on Steven Rostedt's "tracing: Add TRACE_DEFINE_ENUM() macro
>    to map enums to their values" patch set v1.
> 
> v1->v2:
>  - Comment update
>  - Just passing 'result' instead of 'action_name[result]',
>    suggested by Steve. And hard coded there because trace-cmd
>    and perf do not have a way to process enums.
> 
> Xie XiuQi (3):
>   memory-failure: export page_type and action result
>   memory-failure: change type of action_result's param 3 to enum
>   tracing: add trace event for memory-failure
> 
>  include/linux/mm.h      |  34 ++++++++++
>  include/ras/ras_event.h |  85 ++++++++++++++++++++++++
>  mm/memory-failure.c     | 172 ++++++++++++++++++++----------------------------
>  3 files changed, 190 insertions(+), 101 deletions(-)
> 


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Re: [PATCH v4 0/3] tracing: add trace event for memory-failure

[Naoya Horiguchi]

On Wed, Apr 29, 2015 at 07:14:27PM +0800, Xie XiuQi wrote:
> Hi Naoya,
> 
> Could you help to review and applied this series if possible.

Sorry for late response, I was offline for several days due to national
holidays.

This patchset is good to me, but I'm not sure which path it should go through.
Ordinarily, memory-failure patches go to linux-mm, but patch 3 depends on
TRACE_DEFINE_ENUM patches, so this can go to linux-next directly, or go to
linux-mm with depending patches.

Steven, Andrew, which way do you like?

Thanks,
Naoya Horiguchi

> Thanks,
> Xie XiuQi
> 
> On 2015/4/20 16:44, Xie XiuQi wrote:
> > 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 patchset 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
> > 
> > --
> > v3->v4:
> >  - rebase on top of latest linux-next
> >  - update comments as Naoya's suggestion
> >  - add #ifdef CONFIG_MEMORY_FAILURE for this trace event
> >  - change type of action_result's param 3 to enum
> > 
> > v2->v3:
> >  - rebase on top of linux-next
> >  - based on Steven Rostedt's "tracing: Add TRACE_DEFINE_ENUM() macro
> >    to map enums to their values" patch set v1.
> > 
> > v1->v2:
> >  - Comment update
> >  - Just passing 'result' instead of 'action_name[result]',
> >    suggested by Steve. And hard coded there because trace-cmd
> >    and perf do not have a way to process enums.
> > 
> > Xie XiuQi (3):
> >   memory-failure: export page_type and action result
> >   memory-failure: change type of action_result's param 3 to enum
> >   tracing: add trace event for memory-failure
> > 
> >  include/linux/mm.h      |  34 ++++++++++
> >  include/ras/ras_event.h |  85 ++++++++++++++++++++++++
> >  mm/memory-failure.c     | 172 ++++++++++++++++++++----------------------------
> >  3 files changed, 190 insertions(+), 101 deletions(-)
> > 
> 
> 
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Re: [PATCH v4 0/3] tracing: add trace event for memory-failure

[Steven Rostedt]

On Thu, 7 May 2015 01:12:07 +0000
Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> wrote:

> On Wed, Apr 29, 2015 at 07:14:27PM +0800, Xie XiuQi wrote:
> > Hi Naoya,
> > 
> > Could you help to review and applied this series if possible.
> 
> Sorry for late response, I was offline for several days due to national
> holidays.
> 
> This patchset is good to me, but I'm not sure which path it should go through.
> Ordinarily, memory-failure patches go to linux-mm, but patch 3 depends on
> TRACE_DEFINE_ENUM patches, so this can go to linux-next directly, or go to
> linux-mm with depending patches.
> 
> Steven, Andrew, which way do you like?
> 

The TRACE_DEFINE_ENUM() patch set went into the 4.1 merge window. It
should be fine to base off of any of Linus's tags after or including
4.1-rc1.

I need to start converting other trace events for 4.2.

-- Steve

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Re: [PATCH v4 0/3] tracing: add trace event for memory-failure

[Xie XiuQi]

On 2015/5/7 9:12, Naoya Horiguchi wrote:
> On Wed, Apr 29, 2015 at 07:14:27PM +0800, Xie XiuQi wrote:
>> Hi Naoya,
>>
>> Could you help to review and applied this series if possible.
> 
> Sorry for late response, I was offline for several days due to national
> holidays.

It doesn't matter, wish you have a good holiday ;-)

> 
> This patchset is good to me, but I'm not sure which path it should go through.
> Ordinarily, memory-failure patches go to linux-mm, but patch 3 depends on
> TRACE_DEFINE_ENUM patches, so this can go to linux-next directly, or go to
> linux-mm with depending patches.

TRACE_DEFINE_ENUM patches has been merged into mainline. I'll correct patch 3's typo
and rebase them on top of latest mainline in v5.

Thanks,
	Xie XiuQi

> 
> Steven, Andrew, which way do you like?
> 
> Thanks,
> Naoya Horiguchi
> 
>> Thanks,
>> Xie XiuQi
>>
>> On 2015/4/20 16:44, Xie XiuQi wrote:
>>> 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 patchset 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
>>>
>>> --
>>> v3->v4:
>>>  - rebase on top of latest linux-next
>>>  - update comments as Naoya's suggestion
>>>  - add #ifdef CONFIG_MEMORY_FAILURE for this trace event
>>>  - change type of action_result's param 3 to enum
>>>
>>> v2->v3:
>>>  - rebase on top of linux-next
>>>  - based on Steven Rostedt's "tracing: Add TRACE_DEFINE_ENUM() macro
>>>    to map enums to their values" patch set v1.
>>>
>>> v1->v2:
>>>  - Comment update
>>>  - Just passing 'result' instead of 'action_name[result]',
>>>    suggested by Steve. And hard coded there because trace-cmd
>>>    and perf do not have a way to process enums.
>>>
>>> Xie XiuQi (3):
>>>   memory-failure: export page_type and action result
>>>   memory-failure: change type of action_result's param 3 to enum
>>>   tracing: add trace event for memory-failure
>>>
>>>  include/linux/mm.h      |  34 ++++++++++
>>>  include/ras/ras_event.h |  85 ++++++++++++++++++++++++
>>>  mm/memory-failure.c     | 172 ++++++++++++++++++++----------------------------
>>>  3 files changed, 190 insertions(+), 101 deletions(-)
>>>
>>
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