The patch titled
Subject: mm/damon/reclaim: provide reclamation statistics
has been removed from the -mm tree. Its filename was
mm-damon-reclaim-provide-reclamation-statistics.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: SeongJae Park <sj@xxxxxxxxxx>
Subject: mm/damon/reclaim: provide reclamation statistics
This commit implements new DAMON_RECLAIM parameters for statistics
reporting. Those can be used for understanding how DAMON_RECLAIM is
working, and for tuning the other parameters.
Link: https://lkml.kernel.org/r/20211210150016.35349-4-sj@xxxxxxxxxx
Signed-off-by: SeongJae Park <sj@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/damon/reclaim.c | 46 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 46 insertions(+)
--- a/mm/damon/reclaim.c~mm-damon-reclaim-provide-reclamation-statistics
+++ a/mm/damon/reclaim.c
@@ -185,6 +185,36 @@ module_param(monitor_region_end, ulong,
static int kdamond_pid __read_mostly = -1;
module_param(kdamond_pid, int, 0400);
+/*
+ * Number of memory regions that tried to be reclaimed.
+ */
+static unsigned long nr_reclaim_tried_regions __read_mostly;
+module_param(nr_reclaim_tried_regions, ulong, 0400);
+
+/*
+ * Total bytes of memory regions that tried to be reclaimed.
+ */
+static unsigned long bytes_reclaim_tried_regions __read_mostly;
+module_param(bytes_reclaim_tried_regions, ulong, 0400);
+
+/*
+ * Number of memory regions that successfully be reclaimed.
+ */
+static unsigned long nr_reclaimed_regions __read_mostly;
+module_param(nr_reclaimed_regions, ulong, 0400);
+
+/*
+ * Total bytes of memory regions that successfully be reclaimed.
+ */
+static unsigned long bytes_reclaimed_regions __read_mostly;
+module_param(bytes_reclaimed_regions, ulong, 0400);
+
+/*
+ * Number of times that the time/space quota limits have exceeded
+ */
+static unsigned long nr_quota_exceeds __read_mostly;
+module_param(nr_quota_exceeds, ulong, 0400);
+
static struct damon_ctx *ctx;
static struct damon_target *target;
@@ -333,6 +363,21 @@ static void damon_reclaim_timer_fn(struc
}
static DECLARE_DELAYED_WORK(damon_reclaim_timer, damon_reclaim_timer_fn);
+static int damon_reclaim_after_aggregation(struct damon_ctx *c)
+{
+ struct damos *s;
+
+ /* update the stats parameter */
+ damon_for_each_scheme(s, c) {
+ nr_reclaim_tried_regions = s->stat.nr_tried;
+ bytes_reclaim_tried_regions = s->stat.sz_tried;
+ nr_reclaimed_regions = s->stat.nr_applied;
+ bytes_reclaimed_regions = s->stat.sz_applied;
+ nr_quota_exceeds = s->stat.qt_exceeds;
+ }
+ return 0;
+}
+
static int __init damon_reclaim_init(void)
{
ctx = damon_new_ctx();
@@ -340,6 +385,7 @@ static int __init damon_reclaim_init(voi
return -ENOMEM;
damon_pa_set_primitives(ctx);
+ ctx->callback.after_aggregation = damon_reclaim_after_aggregation;
/* 4242 means nothing but fun */
target = damon_new_target(4242);
_
Patches currently in -mm which might be from sj@xxxxxxxxxx are
