linux-kernel - [PATCH] tracing: vmscan: add file/anon identifier to lru_shrink

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Message-ID: <20230804205326.33952-1-npache@redhat.com>
Date:   Fri,  4 Aug 2023 14:53:26 -0600
From:   Nico Pache <npache@...hat.com>
To:     linux-trace-kernel@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     mhiramat@...nel.org, rostedt@...dmis.org
Subject: [PATCH] tracing: vmscan: add file/anon identifier to lru_shrink_[in]active tracepoints

Add the file variable to the tracepoint data for both the active and
inactive lru shrink functions. This should help increase observability
in the LRU reclaim algorithm.

Signed-off-by: Nico Pache <npache@...hat.com>
---
 include/trace/events/vmscan.h | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/include/trace/events/vmscan.h b/include/trace/events/vmscan.h
index d2123dd960d5..055d50c10842 100644
--- a/include/trace/events/vmscan.h
+++ b/include/trace/events/vmscan.h
@@ -372,6 +372,7 @@ TRACE_EVENT(mm_vmscan_lru_shrink_inactive,
 		__field(unsigned long, nr_unmap_fail)
 		__field(int, priority)
 		__field(int, reclaim_flags)
+		__field(int, file)
 	),
 
 	TP_fast_assign(
@@ -388,10 +389,11 @@ TRACE_EVENT(mm_vmscan_lru_shrink_inactive,
 		__entry->nr_unmap_fail = stat->nr_unmap_fail;
 		__entry->priority = priority;
 		__entry->reclaim_flags = trace_reclaim_flags(file);
+		__entry->file = file;
 	),
 
-	TP_printk("nid=%d nr_scanned=%ld nr_reclaimed=%ld nr_dirty=%ld nr_writeback=%ld nr_congested=%ld nr_immediate=%ld nr_activate_anon=%d nr_activate_file=%d nr_ref_keep=%ld nr_unmap_fail=%ld priority=%d flags=%s",
-		__entry->nid,
+	TP_printk("nid=%d is_file=%d nr_scanned=%ld nr_reclaimed=%ld nr_dirty=%ld nr_writeback=%ld nr_congested=%ld nr_immediate=%ld nr_activate_anon=%d nr_activate_file=%d nr_ref_keep=%ld nr_unmap_fail=%ld priority=%d flags=%s",
+		__entry->nid, __entry->file,
 		__entry->nr_scanned, __entry->nr_reclaimed,
 		__entry->nr_dirty, __entry->nr_writeback,
 		__entry->nr_congested, __entry->nr_immediate,
@@ -417,6 +419,7 @@ TRACE_EVENT(mm_vmscan_lru_shrink_active,
 		__field(unsigned long, nr_referenced)
 		__field(int, priority)
 		__field(int, reclaim_flags)
+		__field(int, file)
 	),
 
 	TP_fast_assign(
@@ -427,10 +430,11 @@ TRACE_EVENT(mm_vmscan_lru_shrink_active,
 		__entry->nr_referenced = nr_referenced;
 		__entry->priority = priority;
 		__entry->reclaim_flags = trace_reclaim_flags(file);
+		__entry->file = file;
 	),
 
-	TP_printk("nid=%d nr_taken=%ld nr_active=%ld nr_deactivated=%ld nr_referenced=%ld priority=%d flags=%s",
-		__entry->nid,
+	TP_printk("nid=%d is_file=%d nr_taken=%ld nr_active=%ld nr_deactivated=%ld nr_referenced=%ld priority=%d flags=%s",
+		__entry->nid, __entry->file,
 		__entry->nr_taken,
 		__entry->nr_active, __entry->nr_deactivated, __entry->nr_referenced,
 		__entry->priority,
-- 
2.41.0