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Message-Id: <20220913174449.50645-7-sj@kernel.org>
Date: Tue, 13 Sep 2022 17:44:33 +0000
From: SeongJae Park <sj@...nel.org>
To: SeongJae Park <sj@...nel.org>,
Andrew Morton <akpm@...ux-foundation.org>
Cc: damon@...ts.linux.dev, linux-mm@...ck.org,
linux-kernel@...r.kernel.org
Subject: [PATCH 06/22] mm/damon/core: reduce parameters for damon_set_attrs()
Number of parameters for 'damon_set_attrs()' is six. As it could be
confusing and verbose, this commit reduces the number by receiving
single pointer to a 'struct damon_attrs'.
Signed-off-by: SeongJae Park <sj@...nel.org>
---
include/linux/damon.h | 4 +---
mm/damon/core.c | 21 +++++----------------
mm/damon/dbgfs.c | 9 ++++++---
mm/damon/lru_sort.c | 10 ++++++++--
mm/damon/reclaim.c | 10 ++++++++--
mm/damon/sysfs.c | 12 ++++++++----
6 files changed, 36 insertions(+), 30 deletions(-)
diff --git a/include/linux/damon.h b/include/linux/damon.h
index 2ceee8b07726..c5dc0c77c772 100644
--- a/include/linux/damon.h
+++ b/include/linux/damon.h
@@ -540,9 +540,7 @@ unsigned int damon_nr_regions(struct damon_target *t);
struct damon_ctx *damon_new_ctx(void);
void damon_destroy_ctx(struct damon_ctx *ctx);
-int damon_set_attrs(struct damon_ctx *ctx, unsigned long sample_int,
- unsigned long aggr_int, unsigned long ops_upd_int,
- unsigned long min_nr_reg, unsigned long max_nr_reg);
+int damon_set_attrs(struct damon_ctx *ctx, struct damon_attrs *attrs);
int damon_set_schemes(struct damon_ctx *ctx,
struct damos **schemes, ssize_t nr_schemes);
int damon_nr_running_ctxs(void);
diff --git a/mm/damon/core.c b/mm/damon/core.c
index 1f43ea9d956c..d9d1bebc6a78 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -451,32 +451,21 @@ void damon_destroy_ctx(struct damon_ctx *ctx)
/**
* damon_set_attrs() - Set attributes for the monitoring.
* @ctx: monitoring context
- * @sample_int: time interval between samplings
- * @aggr_int: time interval between aggregations
- * @ops_upd_int: time interval between monitoring operations updates
- * @min_nr_reg: minimal number of regions
- * @max_nr_reg: maximum number of regions
+ * @attrs: monitoring attributes
*
* This function should not be called while the kdamond is running.
* Every time interval is in micro-seconds.
*
* Return: 0 on success, negative error code otherwise.
*/
-int damon_set_attrs(struct damon_ctx *ctx, unsigned long sample_int,
- unsigned long aggr_int, unsigned long ops_upd_int,
- unsigned long min_nr_reg, unsigned long max_nr_reg)
+int damon_set_attrs(struct damon_ctx *ctx, struct damon_attrs *attrs)
{
- if (min_nr_reg < 3)
+ if (attrs->min_nr_regions < 3)
return -EINVAL;
- if (min_nr_reg > max_nr_reg)
+ if (attrs->min_nr_regions > attrs->max_nr_regions)
return -EINVAL;
- ctx->attrs.sample_interval = sample_int;
- ctx->attrs.aggr_interval = aggr_int;
- ctx->attrs.ops_update_interval = ops_upd_int;
- ctx->attrs.min_nr_regions = min_nr_reg;
- ctx->attrs.max_nr_regions = max_nr_reg;
-
+ ctx->attrs = *attrs;
return 0;
}
diff --git a/mm/damon/dbgfs.c b/mm/damon/dbgfs.c
index 74e7542af6d3..c00eba4448d8 100644
--- a/mm/damon/dbgfs.c
+++ b/mm/damon/dbgfs.c
@@ -67,7 +67,7 @@ static ssize_t dbgfs_attrs_write(struct file *file,
const char __user *buf, size_t count, loff_t *ppos)
{
struct damon_ctx *ctx = file->private_data;
- unsigned long s, a, r, minr, maxr;
+ struct damon_attrs attrs;
char *kbuf;
ssize_t ret;
@@ -76,7 +76,10 @@ static ssize_t dbgfs_attrs_write(struct file *file,
return PTR_ERR(kbuf);
if (sscanf(kbuf, "%lu %lu %lu %lu %lu",
- &s, &a, &r, &minr, &maxr) != 5) {
+ &attrs.sample_interval, &attrs.aggr_interval,
+ &attrs.ops_update_interval,
+ &attrs.min_nr_regions,
+ &attrs.max_nr_regions) != 5) {
ret = -EINVAL;
goto out;
}
@@ -87,7 +90,7 @@ static ssize_t dbgfs_attrs_write(struct file *file,
goto unlock_out;
}
- ret = damon_set_attrs(ctx, s, a, r, minr, maxr);
+ ret = damon_set_attrs(ctx, &attrs);
if (!ret)
ret = count;
unlock_out:
diff --git a/mm/damon/lru_sort.c b/mm/damon/lru_sort.c
index 307ba71adcfa..6d5f83965276 100644
--- a/mm/damon/lru_sort.c
+++ b/mm/damon/lru_sort.c
@@ -350,13 +350,19 @@ static struct damos *damon_lru_sort_new_cold_scheme(unsigned int cold_thres)
static int damon_lru_sort_apply_parameters(void)
{
+ struct damon_attrs attrs = {
+ .sample_interval = sample_interval,
+ .aggr_interval = aggr_interval,
+ .ops_update_interval = 0,
+ .min_nr_regions = min_nr_regions,
+ .max_nr_regions = max_nr_regions,
+ };
struct damos *scheme;
struct damon_addr_range addr_range;
unsigned int hot_thres, cold_thres;
int err = 0;
- err = damon_set_attrs(ctx, sample_interval, aggr_interval, 0,
- min_nr_regions, max_nr_regions);
+ err = damon_set_attrs(ctx, &attrs);
if (err)
return err;
diff --git a/mm/damon/reclaim.c b/mm/damon/reclaim.c
index fe7bc0c55ecb..bc841efbab45 100644
--- a/mm/damon/reclaim.c
+++ b/mm/damon/reclaim.c
@@ -275,12 +275,18 @@ static struct damos *damon_reclaim_new_scheme(void)
static int damon_reclaim_apply_parameters(void)
{
+ struct damon_attrs attrs = {
+ .sample_interval = sample_interval,
+ .aggr_interval = aggr_interval,
+ .ops_update_interval = 0,
+ .min_nr_regions = min_nr_regions,
+ .max_nr_regions = max_nr_regions,
+ };
struct damos *scheme;
struct damon_addr_range addr_range;
int err = 0;
- err = damon_set_attrs(ctx, sample_interval, aggr_interval, 0,
- min_nr_regions, max_nr_regions);
+ err = damon_set_attrs(ctx, &attrs);
if (err)
return err;
diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c
index 3606eec9b65d..1fa0023f136e 100644
--- a/mm/damon/sysfs.c
+++ b/mm/damon/sysfs.c
@@ -2130,10 +2130,14 @@ static int damon_sysfs_set_attrs(struct damon_ctx *ctx,
struct damon_sysfs_intervals *sys_intervals = sys_attrs->intervals;
struct damon_sysfs_ul_range *sys_nr_regions =
sys_attrs->nr_regions_range;
-
- return damon_set_attrs(ctx, sys_intervals->sample_us,
- sys_intervals->aggr_us, sys_intervals->update_us,
- sys_nr_regions->min, sys_nr_regions->max);
+ struct damon_attrs attrs = {
+ .sample_interval = sys_intervals->sample_us,
+ .aggr_interval = sys_intervals->aggr_us,
+ .ops_update_interval = sys_intervals->update_us,
+ .min_nr_regions = sys_nr_regions->min,
+ .max_nr_regions = sys_nr_regions->max,
+ };
+ return damon_set_attrs(ctx, &attrs);
}
static void damon_sysfs_destroy_targets(struct damon_ctx *ctx)
--
2.25.1
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