vmscan/trace: Add 'file' info to trace_mm_vmscan_lru_isolate()

In trace_mm_vmscan_lru_isolate(), we don't output 'file' information to
the trace event and it is a bit inconvenient for the user to get the
real information(like pasted below).  mm_vmscan_lru_isolate:
isolate_mode=2 order=0 nr_requested=32 nr_scanned=32 nr_taken=32
contig_taken=0 contig_dirty=0 contig_failed=0

'active' can be obtained by analyzing mode(Thanks go to Minchan and
Mel), So this patch adds 'file' to the trace event and it now looks
like: mm_vmscan_lru_isolate: isolate_mode=2 order=0 nr_requested=32
nr_scanned=32 nr_taken=32 contig_taken=0 contig_dirty=0 contig_failed=0
file=0

Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Reviewed-by: Minchan Kim <minchan@kernel.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 15 insertions, 9 deletions

diff --git a/include/trace/events/vmscan.h b/include/trace/events/vmscan.h
index edc4b3d25a2d..f64560e204bc 100644
--- a/include/trace/events/vmscan.h
+++ b/include/trace/events/vmscan.h
@@ -266,9 +266,10 @@ DECLARE_EVENT_CLASS(mm_vmscan_lru_isolate_template,
                 unsigned long nr_lumpy_taken,
                 unsigned long nr_lumpy_dirty,
                 unsigned long nr_lumpy_failed,
-                isolate_mode_t isolate_mode),
+                isolate_mode_t isolate_mode,
+                int file),
 
-        TP_ARGS(order, nr_requested, nr_scanned, nr_taken, nr_lumpy_taken, nr_lumpy_dirty, nr_lumpy_failed, isolate_mode),
+        TP_ARGS(order, nr_requested, nr_scanned, nr_taken, nr_lumpy_taken, nr_lumpy_dirty, nr_lumpy_failed, isolate_mode, file),
 
         TP_STRUCT__entry(
                 __field(int, order)
@@ -279,6 +280,7 @@ DECLARE_EVENT_CLASS(mm_vmscan_lru_isolate_template,
                 __field(unsigned long, nr_lumpy_dirty)
                 __field(unsigned long, nr_lumpy_failed)
                 __field(isolate_mode_t, isolate_mode)
+                __field(int, file)
         ),
 
         TP_fast_assign(
@@ -290,9 +292,10 @@ DECLARE_EVENT_CLASS(mm_vmscan_lru_isolate_template,
                 __entry->nr_lumpy_dirty = nr_lumpy_dirty;
                 __entry->nr_lumpy_failed = nr_lumpy_failed;
                 __entry->isolate_mode = isolate_mode;
+                __entry->file = file;
         ),
 
-        TP_printk("isolate_mode=%d order=%d nr_requested=%lu nr_scanned=%lu nr_taken=%lu contig_taken=%lu contig_dirty=%lu contig_failed=%lu",
+        TP_printk("isolate_mode=%d order=%d nr_requested=%lu nr_scanned=%lu nr_taken=%lu contig_taken=%lu contig_dirty=%lu contig_failed=%lu file=%d",
                 __entry->isolate_mode,
                 __entry->order,
                 __entry->nr_requested,
@@ -300,7 +303,8 @@ DECLARE_EVENT_CLASS(mm_vmscan_lru_isolate_template,
                 __entry->nr_taken,
                 __entry->nr_lumpy_taken,
                 __entry->nr_lumpy_dirty,
-                __entry->nr_lumpy_failed)
+                __entry->nr_lumpy_failed,
+                __entry->file)
 );
 
 DEFINE_EVENT(mm_vmscan_lru_isolate_template, mm_vmscan_lru_isolate,
@@ -312,9 +316,10 @@ DEFINE_EVENT(mm_vmscan_lru_isolate_template, mm_vmscan_lru_isolate,
                 unsigned long nr_lumpy_taken,
                 unsigned long nr_lumpy_dirty,
                 unsigned long nr_lumpy_failed,
-                isolate_mode_t isolate_mode),
+                isolate_mode_t isolate_mode,
+                int file),
 
-        TP_ARGS(order, nr_requested, nr_scanned, nr_taken, nr_lumpy_taken, nr_lumpy_dirty, nr_lumpy_failed, isolate_mode)
+        TP_ARGS(order, nr_requested, nr_scanned, nr_taken, nr_lumpy_taken, nr_lumpy_dirty, nr_lumpy_failed, isolate_mode, file)
 
 );
 
@@ -327,9 +332,10 @@ DEFINE_EVENT(mm_vmscan_lru_isolate_template, mm_vmscan_memcg_isolate,
                 unsigned long nr_lumpy_taken,
                 unsigned long nr_lumpy_dirty,
                 unsigned long nr_lumpy_failed,
-                isolate_mode_t isolate_mode),
+                isolate_mode_t isolate_mode,
+                int file),
 
-        TP_ARGS(order, nr_requested, nr_scanned, nr_taken, nr_lumpy_taken, nr_lumpy_dirty, nr_lumpy_failed, isolate_mode)
+        TP_ARGS(order, nr_requested, nr_scanned, nr_taken, nr_lumpy_taken, nr_lumpy_dirty, nr_lumpy_failed, isolate_mode, file)
 
 );
 
diff --git a/mm/vmscan.c b/mm/vmscan.c
index e16ca8384ef7..a85a261bf8f9 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1234,7 +1234,7 @@ static unsigned long isolate_lru_pages(unsigned long nr_to_scan,
                         nr_to_scan, scan,
                         nr_taken,
                         nr_lumpy_taken, nr_lumpy_dirty, nr_lumpy_failed,
-                        mode);
+                        mode, file);
         return nr_taken;
 }