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Date: Fri, 9 Sep 2022 10:41:05 +0800
From: Xin Hao <xhao@...ux.alibaba.com>
To: sj@...nel.org
Cc: akpm@...ux-foundation.org, damon@...ts.linux.dev,
linux-mm@...ck.org, linux-kernel@...r.kernel.org,
xhao@...ux.alibaba.com
Subject: [PATCH V4] mm/damon: Remove duplicate get_monitoring_region() definitions
In lru_sort.c and reclaim.c, they are all defining get_monitoring_region()
function, there is no need to define it separately.
As 'get_monitoring_region()' is not a 'static' function anymore, we try
to use a prefix to distinguish with other functions, so there rename it
to 'damon_find_biggest_system_ram'.
Suggested-by: SeongJae Park <sj@...nel.org>
Signed-off-by: Xin Hao <xhao@...ux.alibaba.com>
---
include/linux/damon.h | 11 +++++++++++
mm/damon/core.c | 29 +++++++++++++++++++++++++++++
mm/damon/lru_sort.c | 37 ++-----------------------------------
mm/damon/reclaim.c | 37 ++-----------------------------------
4 files changed, 44 insertions(+), 70 deletions(-)
diff --git a/include/linux/damon.h b/include/linux/damon.h
index 7b1f4a488230..6c863b281fb2 100644
--- a/include/linux/damon.h
+++ b/include/linux/damon.h
@@ -448,6 +448,16 @@ struct damon_ctx {
struct list_head schemes;
};
+/**
+ * struct damon_system_ram_region - System RAM resource address region of [@start, @end).
+ * @start: Start address of the (inclusive).
+ * @end: End address of the region (exclusive).
+ */
+struct damon_system_ram_region {
+ unsigned long start;
+ unsigned long end;
+};
+
static inline struct damon_region *damon_next_region(struct damon_region *r)
{
return container_of(r->list.next, struct damon_region, list);
@@ -500,6 +510,7 @@ void damon_add_region(struct damon_region *r, struct damon_target *t);
void damon_destroy_region(struct damon_region *r, struct damon_target *t);
int damon_set_regions(struct damon_target *t, struct damon_addr_range *ranges,
unsigned int nr_ranges);
+bool damon_find_biggest_system_ram(unsigned long *start, unsigned long *end);
struct damos *damon_new_scheme(
unsigned long min_sz_region, unsigned long max_sz_region,
diff --git a/mm/damon/core.c b/mm/damon/core.c
index 7d25dc582fe3..d07181e1473b 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -276,6 +276,35 @@ struct damos *damon_new_scheme(
return scheme;
}
+static int walk_system_ram(struct resource *res, void *arg)
+{
+ struct damon_system_ram_region *a = arg;
+
+ if (a->end - a->start < resource_size(res)) {
+ a->start = res->start;
+ a->end = res->end;
+ }
+ return 0;
+}
+
+/*
+ * Find biggest 'System RAM' resource and store its start and end address in
+ * @start and @end, respectively. If no System RAM is found, returns false.
+ */
+bool damon_find_biggest_system_ram(unsigned long *start, unsigned long *end)
+
+{
+ struct damon_system_ram_region arg = {};
+
+ walk_system_ram_res(0, ULONG_MAX, &arg, walk_system_ram);
+ if (arg.end <= arg.start)
+ return false;
+
+ *start = arg.start;
+ *end = arg.end;
+ return true;
+}
+
void damon_add_scheme(struct damon_ctx *ctx, struct damos *s)
{
list_add_tail(&s->list, &ctx->schemes);
diff --git a/mm/damon/lru_sort.c b/mm/damon/lru_sort.c
index 9de6f00a71c5..b8ec52739e0f 100644
--- a/mm/damon/lru_sort.c
+++ b/mm/damon/lru_sort.c
@@ -257,39 +257,6 @@ module_param(nr_cold_quota_exceeds, ulong, 0400);
static struct damon_ctx *ctx;
static struct damon_target *target;
-struct damon_lru_sort_ram_walk_arg {
- unsigned long start;
- unsigned long end;
-};
-
-static int walk_system_ram(struct resource *res, void *arg)
-{
- struct damon_lru_sort_ram_walk_arg *a = arg;
-
- if (a->end - a->start < resource_size(res)) {
- a->start = res->start;
- a->end = res->end;
- }
- return 0;
-}
-
-/*
- * Find biggest 'System RAM' resource and store its start and end address in
- * @start and @end, respectively. If no System RAM is found, returns false.
- */
-static bool get_monitoring_region(unsigned long *start, unsigned long *end)
-{
- struct damon_lru_sort_ram_walk_arg arg = {};
-
- walk_system_ram_res(0, ULONG_MAX, &arg, walk_system_ram);
- if (arg.end <= arg.start)
- return false;
-
- *start = arg.start;
- *end = arg.end;
- return true;
-}
-
/* Create a DAMON-based operation scheme for hot memory regions */
static struct damos *damon_lru_sort_new_hot_scheme(unsigned int hot_thres)
{
@@ -404,8 +371,8 @@ static int damon_lru_sort_apply_parameters(void)
if (monitor_region_start > monitor_region_end)
return -EINVAL;
if (!monitor_region_start && !monitor_region_end &&
- !get_monitoring_region(&monitor_region_start,
- &monitor_region_end))
+ !damon_find_biggest_system_ram(&monitor_region_start,
+ &monitor_region_end))
return -EINVAL;
addr_range.start = monitor_region_start;
addr_range.end = monitor_region_end;
diff --git a/mm/damon/reclaim.c b/mm/damon/reclaim.c
index a7faf51b4bd4..7d41913cb0e1 100644
--- a/mm/damon/reclaim.c
+++ b/mm/damon/reclaim.c
@@ -229,39 +229,6 @@ module_param(nr_quota_exceeds, ulong, 0400);
static struct damon_ctx *ctx;
static struct damon_target *target;
-struct damon_reclaim_ram_walk_arg {
- unsigned long start;
- unsigned long end;
-};
-
-static int walk_system_ram(struct resource *res, void *arg)
-{
- struct damon_reclaim_ram_walk_arg *a = arg;
-
- if (a->end - a->start < resource_size(res)) {
- a->start = res->start;
- a->end = res->end;
- }
- return 0;
-}
-
-/*
- * Find biggest 'System RAM' resource and store its start and end address in
- * @start and @end, respectively. If no System RAM is found, returns false.
- */
-static bool get_monitoring_region(unsigned long *start, unsigned long *end)
-{
- struct damon_reclaim_ram_walk_arg arg = {};
-
- walk_system_ram_res(0, ULONG_MAX, &arg, walk_system_ram);
- if (arg.end <= arg.start)
- return false;
-
- *start = arg.start;
- *end = arg.end;
- return true;
-}
-
static struct damos *damon_reclaim_new_scheme(void)
{
struct damos_watermarks wmarks = {
@@ -323,8 +290,8 @@ static int damon_reclaim_apply_parameters(void)
if (monitor_region_start > monitor_region_end)
return -EINVAL;
if (!monitor_region_start && !monitor_region_end &&
- !get_monitoring_region(&monitor_region_start,
- &monitor_region_end))
+ !damon_find_biggest_system_ram(&monitor_region_start,
+ &monitor_region_end))
return -EINVAL;
addr_range.start = monitor_region_start;
addr_range.end = monitor_region_end;
--
2.31.0
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