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Subject[PATCH] tracing: vmscan: add file/anon identifier to lru_shrink_[in]active tracepoints
Date
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@redhat.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
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