mm/damon/reclaim: use stat parameters generator

This commit makes DAMON_RECLAIM to generate the module parameters for
DAMOS statistics using the generator macro to simplify the code and
reduce duplicates.

Link: https://lkml.kernel.org/r/20220913174449.50645-17-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/damon/reclaim.c b/mm/damon/reclaim.c
index 7f845f6..1ef8353 100644 (file)
--- a/mm/damon/reclaim.c
+++ b/mm/damon/reclaim.c
@@ -136,35 +136,9 @@ module_param(monitor_region_end, ulong, 0600);
 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 damos_stat damon_reclaim_stat;
+DEFINE_DAMON_MODULES_DAMOS_STATS_PARAMS(damon_reclaim_stat,
+               reclaim_tried_regions, reclaimed_regions, quota_exceeds);
 
 static struct damon_ctx *ctx;
 static struct damon_target *target;
@@ -318,13 +292,8 @@ 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;
-       }
+       damon_for_each_scheme(s, c)
+               damon_reclaim_stat = s->stat;
 
        return damon_reclaim_handle_commit_inputs();
 }