From 987ffa5a3858bee448dc791cf6f596790aea52a8 Mon Sep 17 00:00:00 2001
From: Huan Yang
Date: Wed, 20 Sep 2023 09:57:27 +0800
Subject: mm/damon/core: remove unnecessary si_meminfo invoke.
si_meminfo() will read and assign more info not just free/ram pages. For
just DAMOS_WMARK_FREE_MEM_RATE use, only get free and ram pages is ok to
save cpu.
Link: https://lkml.kernel.org/r/20230920015727.4482-1-link@vivo.com
Signed-off-by: Huan Yang
Reviewed-by: SeongJae Park
Signed-off-by: Andrew Morton
---
mm/damon/core.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
(limited to 'mm/damon')
diff --git a/mm/damon/core.c b/mm/damon/core.c
index 5eb649bd002f..9f4f7c378cf3 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -1326,12 +1326,10 @@ static bool kdamond_need_stop(struct damon_ctx *ctx)
static unsigned long damos_wmark_metric_value(enum damos_wmark_metric metric)
{
- struct sysinfo i;
-
switch (metric) {
case DAMOS_WMARK_FREE_MEM_RATE:
- si_meminfo(&i);
- return i.freeram * 1000 / i.totalram;
+ return global_zone_page_state(NR_FREE_PAGES) * 1000 /
+ totalram_pages();
default:
break;
}
--
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