The patch titled
Subject: mm-vmscan-add-active-list-aging-tracepoint-update
has been added to the -mm tree. Its filename is
mm-vmscan-add-active-list-aging-tracepoint-update.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-vmscan-add-active-list-aging-tracepoint-update.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-vmscan-add-active-list-aging-tracepoint-update.patch
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The -mm tree is included into linux-next and is updated
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------------------------------------------------------
From: Michal Hocko <mhocko@xxxxxxxx>
Subject: mm-vmscan-add-active-list-aging-tracepoint-update
Our reclaim process has several tracepoints to tell us more about how
things are progressing. We are, however, missing a tracepoint to track
active list aging. Introduce mm_vmscan_lru_shrink_active which reports
the number of
- nr_taken is number of isolated pages from the active list
- nr_referenced pages which tells us that we are hitting referenced
pages which are deactivated. If this is a large part of the
reported nr_deactivated pages then we might be hitting into
the active list too early because they might be still part of
the working set. This might help to debug performance issues.
- nr_active pages which tells us how many pages are kept on the
active list - mostly exec file backed pages. A high number can
indicate that we might be trashing on executables.
Link: http://lkml.kernel.org/r/20170104135244.GJ25453@xxxxxxxxxxxxxx
Signed-off-by: Michal Hocko <mhocko@xxxxxxxx>
Acked-by: Hillf Danton <hillf.zj@xxxxxxxxxxxxxxx>
Acked-by: Mel Gorman <mgorman@xxxxxxx>
Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/trace/events/vmscan.h | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff -puN include/trace/events/vmscan.h~mm-vmscan-add-active-list-aging-tracepoint-update include/trace/events/vmscan.h
--- a/include/trace/events/vmscan.h~mm-vmscan-add-active-list-aging-tracepoint-update
+++ a/include/trace/events/vmscan.h
@@ -366,15 +366,15 @@ TRACE_EVENT(mm_vmscan_lru_shrink_inactiv
TRACE_EVENT(mm_vmscan_lru_shrink_active,
TP_PROTO(int nid, unsigned long nr_taken,
- unsigned long nr_activate, unsigned long nr_deactivated,
+ unsigned long nr_active, unsigned long nr_deactivated,
unsigned long nr_referenced, int priority, int file),
- TP_ARGS(nid, nr_taken, nr_activate, nr_deactivated, nr_referenced, priority, file),
+ TP_ARGS(nid, nr_taken, nr_active, nr_deactivated, nr_referenced, priority, file),
TP_STRUCT__entry(
__field(int, nid)
__field(unsigned long, nr_taken)
- __field(unsigned long, nr_activate)
+ __field(unsigned long, nr_active)
__field(unsigned long, nr_deactivated)
__field(unsigned long, nr_referenced)
__field(int, priority)
@@ -384,17 +384,17 @@ TRACE_EVENT(mm_vmscan_lru_shrink_active,
TP_fast_assign(
__entry->nid = nid;
__entry->nr_taken = nr_taken;
- __entry->nr_activate = nr_activate;
+ __entry->nr_active = nr_active;
__entry->nr_deactivated = nr_deactivated;
__entry->nr_referenced = nr_referenced;
__entry->priority = priority;
__entry->reclaim_flags = trace_shrink_flags(file);
),
- TP_printk("nid=%d nr_taken=%ld nr_activated=%ld nr_deactivated=%ld nr_referenced=%ld priority=%d flags=%s",
+ TP_printk("nid=%d nr_taken=%ld nr_active=%ld nr_deactivated=%ld nr_referenced=%ld priority=%d flags=%s",
__entry->nid,
__entry->nr_taken,
- __entry->nr_activate, __entry->nr_deactivated, __entry->nr_referenced,
+ __entry->nr_active, __entry->nr_deactivated, __entry->nr_referenced,
__entry->priority,
show_reclaim_flags(__entry->reclaim_flags))
);
_
Patches currently in -mm which might be from mhocko@xxxxxxxx are
mm-slab-make-sure-that-kmalloc_max_size-will-fit-into-max_order.patch
bpf-do-not-use-kmalloc_shift_max.patch
mm-fix-remote-numa-hits-statistics.patch
mm-get-rid-of-__gfp_other_node.patch
mm-throttle-show_mem-from-warn_alloc.patch
mm-trace-extract-compaction_status-and-zone_type-to-a-common-header.patch
oom-trace-add-oom-detection-tracepoints.patch
oom-trace-add-compaction-retry-tracepoint.patch
mm-vmscan-remove-unused-mm_vmscan_memcg_isolate.patch
mm-vmscan-add-active-list-aging-tracepoint.patch
mm-vmscan-add-active-list-aging-tracepoint-update.patch
mm-vmscan-show-the-number-of-skipped-pages-in-mm_vmscan_lru_isolate.patch
mm-vmscan-show-lru-name-in-mm_vmscan_lru_isolate-tracepoint.patch
mm-vmscan-extract-shrink_page_list-reclaim-counters-into-a-struct.patch
mm-vmscan-enhance-mm_vmscan_lru_shrink_inactive-tracepoint.patch
mm-vmscan-add-mm_vmscan_inactive_list_is_low-tracepoint.patch
trace-vmscan-postprocess-sync-with-tracepoints-updates.patch
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