[nacked] mm-vmscan-add-new-event-to-trace-shrink-lru.patch removed from -mm tree

[Andrew Morton <akpm@linux-foundation.org>]

The quilt patch titled
     Subject: mm: vmscan: add new event to trace shrink lru
has been removed from the -mm tree.  Its filename was
     mm-vmscan-add-new-event-to-trace-shrink-lru.patch

This patch was dropped because it was nacked

------------------------------------------------------
From: Bixuan Cui <cuibixuan@vivo.com>
Subject: mm: vmscan: add new event to trace shrink lru
Date: Thu, 4 Jan 2024 17:36:07 -0800

Page reclaim is an important part of memory reclaim, including:
  * shrink_active_list(), moves folios from the active LRU to the inactive LRU
  * shrink_inactive_list(), shrink lru from inactive LRU list

Add the new events to calculate the execution time to better evaluate the
entire memory recycling ratio.

Example of output:
         kswapd0-103     [007] .....  1098.353020: mm_vmscan_lru_shrink_active_start: nid=0
         kswapd0-103     [007] .....  1098.353040: mm_vmscan_lru_shrink_active_end: nid=0 nr_taken=32 nr_active=0 nr_deactivated=32 nr_referenced=0 priority=6 flags=RECLAIM_WB_FILE|RECLAIM_WB_ASYNC
         kswapd0-103     [007] .....  1098.353040: mm_vmscan_lru_shrink_inactive_start: nid=0
         kswapd0-103     [007] .....  1098.353094: mm_vmscan_lru_shrink_inactive_end: nid=0 nr_scanned=32 nr_reclaimed=0 nr_dirty=0 nr_writeback=0 nr_congested=0 nr_immediate=0 nr_activate_anon=0 nr_activate_file=0 nr_ref_keep=32 nr_unmap_fail=0 priority=6 flags=RECLAIM_WB_ANON|RECLAIM_WB_ASYNC
         kswapd0-103     [007] .....  1098.353094: mm_vmscan_lru_shrink_inactive_start: nid=0
         kswapd0-103     [007] .....  1098.353162: mm_vmscan_lru_shrink_inactive_end: nid=0 nr_scanned=32 nr_reclaimed=21 nr_dirty=0 nr_writeback=0 nr_congested=0 nr_immediate=0 nr_activate_anon=0 nr_activate_file=0 nr_ref_keep=11 nr_unmap_fail=0 priority=6 flags=RECLAIM_WB_FILE|RECLAIM_WB_ASYNC

Link: https://lkml.kernel.org/r/20240105013607.2868-3-cuibixuan@vivo.com
Signed-off-by: Bixuan Cui <cuibixuan@vivo.com>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/trace/events/vmscan.h |   31 +++++++++++++++++++++++++++++--
 mm/vmscan.c                   |   11 ++++++++---
 2 files changed, 37 insertions(+), 5 deletions(-)

--- a/include/trace/events/vmscan.h~mm-vmscan-add-new-event-to-trace-shrink-lru
+++ a/include/trace/events/vmscan.h
@@ -395,7 +395,34 @@ TRACE_EVENT(mm_vmscan_write_folio,
 		show_reclaim_flags(__entry->reclaim_flags))
 );
 
-TRACE_EVENT(mm_vmscan_lru_shrink_inactive,
+DECLARE_EVENT_CLASS(mm_vmscan_lru_shrink_start_template,
+
+	TP_PROTO(int nid),
+
+	TP_ARGS(nid),
+
+	TP_STRUCT__entry(
+		__field(int, nid)
+	),
+
+	TP_fast_assign(
+		__entry->nid = nid;
+	),
+
+	TP_printk("nid=%d", __entry->nid)
+);
+
+DEFINE_EVENT(mm_vmscan_lru_shrink_start_template, mm_vmscan_lru_shrink_inactive_start,
+	TP_PROTO(int nid),
+	TP_ARGS(nid)
+);
+
+DEFINE_EVENT(mm_vmscan_lru_shrink_start_template, mm_vmscan_lru_shrink_active_start,
+	TP_PROTO(int nid),
+	TP_ARGS(nid)
+);
+
+TRACE_EVENT(mm_vmscan_lru_shrink_inactive_end,
 
 	TP_PROTO(int nid,
 		unsigned long nr_scanned, unsigned long nr_reclaimed,
@@ -446,7 +473,7 @@ TRACE_EVENT(mm_vmscan_lru_shrink_inactiv
 		show_reclaim_flags(__entry->reclaim_flags))
 );
 
-TRACE_EVENT(mm_vmscan_lru_shrink_active,
+TRACE_EVENT(mm_vmscan_lru_shrink_active_end,
 
 	TP_PROTO(int nid, unsigned long nr_taken,
 		unsigned long nr_active, unsigned long nr_deactivated,
--- a/mm/vmscan.c~mm-vmscan-add-new-event-to-trace-shrink-lru
+++ a/mm/vmscan.c
@@ -1879,6 +1879,8 @@ static unsigned long shrink_inactive_lis
 	struct pglist_data *pgdat = lruvec_pgdat(lruvec);
 	bool stalled = false;
 
+	trace_mm_vmscan_lru_shrink_inactive_start(pgdat->node_id);
+
 	while (unlikely(too_many_isolated(pgdat, file, sc))) {
 		if (stalled)
 			return 0;
@@ -1963,7 +1965,7 @@ static unsigned long shrink_inactive_lis
 	if (file)
 		sc->nr.file_taken += nr_taken;
 
-	trace_mm_vmscan_lru_shrink_inactive(pgdat->node_id,
+	trace_mm_vmscan_lru_shrink_inactive_end(pgdat->node_id,
 			nr_scanned, nr_reclaimed, &stat, sc->priority, file);
 	return nr_reclaimed;
 }
@@ -2001,6 +2003,8 @@ static void shrink_active_list(unsigned
 	int file = is_file_lru(lru);
 	struct pglist_data *pgdat = lruvec_pgdat(lruvec);
 
+	trace_mm_vmscan_lru_shrink_active_start(pgdat->node_id);
+
 	lru_add_drain();
 
 	spin_lock_irq(&lruvec->lru_lock);
@@ -2080,7 +2084,7 @@ static void shrink_active_list(unsigned
 		lru_note_cost(lruvec, file, 0, nr_rotated);
 	mem_cgroup_uncharge_list(&l_active);
 	free_unref_page_list(&l_active);
-	trace_mm_vmscan_lru_shrink_active(pgdat->node_id, nr_taken, nr_activate,
+	trace_mm_vmscan_lru_shrink_active_end(pgdat->node_id, nr_taken, nr_activate,
 			nr_deactivate, nr_rotated, sc->priority, file);
 }
 
@@ -4518,9 +4522,10 @@ static int evict_folios(struct lruvec *l
 	if (list_empty(&list))
 		return scanned;
 retry:
+	trace_mm_vmscan_lru_shrink_inactive_start(pgdat->node_id);
 	reclaimed = shrink_folio_list(&list, pgdat, sc, &stat, false);
 	sc->nr_reclaimed += reclaimed;
-	trace_mm_vmscan_lru_shrink_inactive(pgdat->node_id,
+	trace_mm_vmscan_lru_shrink_inactive_end(pgdat->node_id,
 			scanned, reclaimed, &stat, sc->priority,
 			type ? LRU_INACTIVE_FILE : LRU_INACTIVE_ANON);
 
_

Patches currently in -mm which might be from cuibixuan@vivo.com are