[PATCH v2 3/5] mm: add numa fields for tracepoint rss_stat

[Gang Li]

Since we add numa_count for mm->rss_stat, the tracepoint should
also be modified. Now the output looks like this:

```
sleep-660   [002]   918.524333: rss_stat:             mm_id=1539334265 curr=0 type=MM_NO_TYPE type_size=0B node=2 node_size=32768B diff_size=-8192B
sleep-660   [002]   918.524333: rss_stat:             mm_id=1539334265 curr=0 type=MM_FILEPAGES type_size=4096B node=-1 node_size=0B diff_size=-4096B
sleep-660   [002]   918.524333: rss_stat:             mm_id=1539334265 curr=0 type=MM_NO_TYPE type_size=0B node=1 node_size=0B diff_size=-4096B
```

Signed-off-by: Gang Li <ligang.bdlg@xxxxxxxxxxxxx>
---
 include/linux/mm.h          |  9 +++++----
 include/trace/events/kmem.h | 27 ++++++++++++++++++++-------
 mm/memory.c                 |  5 +++--
 3 files changed, 28 insertions(+), 13 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 84ce6e1b1252..a7150ee7439c 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2041,27 +2041,28 @@ static inline unsigned long get_mm_counter(struct mm_struct *mm, int member, int
 	return (unsigned long)val;
 }
 
-void mm_trace_rss_stat(struct mm_struct *mm, int member, long count);
+void mm_trace_rss_stat(struct mm_struct *mm, int member, long member_count, int node,
+		       long numa_count, long diff_count);
 
 static inline void add_mm_counter(struct mm_struct *mm, int member, long value, int node)
 {
 	long count = atomic_long_add_return(value, &mm->rss_stat.count[member]);
 
-	mm_trace_rss_stat(mm, member, count);
+	mm_trace_rss_stat(mm, member, count, NUMA_NO_NODE, 0, value);
 }
 
 static inline void inc_mm_counter(struct mm_struct *mm, int member, int node)
 {
 	long count = atomic_long_inc_return(&mm->rss_stat.count[member]);
 
-	mm_trace_rss_stat(mm, member, count);
+	mm_trace_rss_stat(mm, member, count, NUMA_NO_NODE, 0, 1);
 }
 
 static inline void dec_mm_counter(struct mm_struct *mm, int member, int node)
 {
 	long count = atomic_long_dec_return(&mm->rss_stat.count[member]);
 
-	mm_trace_rss_stat(mm, member, count);
+	mm_trace_rss_stat(mm, member, count, NUMA_NO_NODE, 0, -1);
 }
 
 /* Optimized variant when page is already known not to be PageAnon */
diff --git a/include/trace/events/kmem.h b/include/trace/events/kmem.h
index 4cb51ace600d..7c8ad4aeb7b1 100644
--- a/include/trace/events/kmem.h
+++ b/include/trace/events/kmem.h
@@ -363,7 +363,8 @@ static unsigned int __maybe_unused mm_ptr_to_hash(const void *ptr)
 	EM(MM_FILEPAGES)	\
 	EM(MM_ANONPAGES)	\
 	EM(MM_SWAPENTS)		\
-	EMe(MM_SHMEMPAGES)
+	EM(MM_SHMEMPAGES)	\
+	EMe(MM_NO_TYPE)
 
 #undef EM
 #undef EMe
@@ -383,29 +384,41 @@ TRACE_EVENT(rss_stat,
 
 	TP_PROTO(struct mm_struct *mm,
 		int member,
-		long count),
+		long member_count,
+		int node,
+		long node_count,
+		long diff_count),
 
-	TP_ARGS(mm, member, count),
+	TP_ARGS(mm, member, member_count, node, node_count, diff_count),
 
 	TP_STRUCT__entry(
 		__field(unsigned int, mm_id)
 		__field(unsigned int, curr)
 		__field(int, member)
-		__field(long, size)
+		__field(long, member_size)
+		__field(int, node)
+		__field(long, node_size)
+		__field(long, diff_size)
 	),
 
 	TP_fast_assign(
 		__entry->mm_id = mm_ptr_to_hash(mm);
 		__entry->curr = !!(current->mm == mm);
 		__entry->member = member;
-		__entry->size = (count << PAGE_SHIFT);
+		__entry->member_size = (member_count << PAGE_SHIFT);
+		__entry->node = node;
+		__entry->node_size = (node_count << PAGE_SHIFT);
+		__entry->diff_size = (diff_count << PAGE_SHIFT);
 	),
 
-	TP_printk("mm_id=%u curr=%d type=%s size=%ldB",
+	TP_printk("mm_id=%u curr=%d type=%s type_size=%ldB node=%d node_size=%ldB diff_size=%ldB",
 		__entry->mm_id,
 		__entry->curr,
 		__print_symbolic(__entry->member, TRACE_MM_PAGES),
-		__entry->size)
+		__entry->member_size,
+		__entry->node,
+		__entry->node_size,
+		__entry->diff_size)
 	);
 #endif /* _TRACE_KMEM_H */
 
diff --git a/mm/memory.c b/mm/memory.c
index bb24da767f79..b085f368ae11 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -173,9 +173,10 @@ static int __init init_zero_pfn(void)
 }
 early_initcall(init_zero_pfn);
 
-void mm_trace_rss_stat(struct mm_struct *mm, int member, long count)
+void mm_trace_rss_stat(struct mm_struct *mm, int member, long member_count, int node,
+		       long numa_count, long diff_count)
 {
-	trace_rss_stat(mm, member, count);
+	trace_rss_stat(mm, member, member_count, node, numa_count, diff_count);
 }
 
 #if defined(SPLIT_RSS_COUNTING)
-- 
2.20.1