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Subject[PATCH 7/7] memcg: add mm_vmscan_memcg_isolate tracepoint
Date

Memcg also need to trace page isolation information as global reclaim.
This patch does it.

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
---
include/trace/events/vmscan.h | 15 +++++++++++++++
mm/memcontrol.c | 7 +++++++
2 files changed, 22 insertions(+), 0 deletions(-)

diff --git a/include/trace/events/vmscan.h b/include/trace/events/vmscan.h
index e37fe72..eefd399 100644
--- a/include/trace/events/vmscan.h
+++ b/include/trace/events/vmscan.h
@@ -213,6 +213,21 @@ DEFINE_EVENT(mm_vmscan_lru_isolate_template, mm_vmscan_lru_isolate,

);

+DEFINE_EVENT(mm_vmscan_lru_isolate_template, mm_vmscan_memcg_isolate,
+
+ TP_PROTO(int order,
+ unsigned long nr_requested,
+ unsigned long nr_scanned,
+ unsigned long nr_taken,
+ unsigned long nr_lumpy_taken,
+ unsigned long nr_lumpy_dirty,
+ unsigned long nr_lumpy_failed,
+ int isolate_mode),
+
+ TP_ARGS(order, nr_requested, nr_scanned, nr_taken, nr_lumpy_taken, nr_lumpy_dirty, nr_lumpy_failed, isolate_mode)
+
+);
+
TRACE_EVENT(mm_vmscan_writepage,

TP_PROTO(struct page *page,
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 81bc9bf..82e191f 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -52,6 +52,9 @@

#include <asm/uaccess.h>

+#include <trace/events/vmscan.h>
+
+
struct cgroup_subsys mem_cgroup_subsys __read_mostly;
#define MEM_CGROUP_RECLAIM_RETRIES 5
struct mem_cgroup *root_mem_cgroup __read_mostly;
@@ -1042,6 +1045,10 @@ unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
}

*scanned = scan;
+
+ trace_mm_vmscan_memcg_isolate(0, nr_to_scan, scan, nr_taken,
+ 0, 0, 0, mode);
+
return nr_taken;
}

--
1.6.5.2




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