Messages in this thread Patch in this message | | | From | Huan Yang <> | Subject | [PATCH v2] mm/damon/core: remove unnecessary si_meminfo invoke. | Date | Tue, 19 Sep 2023 10:00:57 +0800 |
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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.
Change from v1: v1 fold free mem rate logic into __damos_get_wmark_free_mem_rate and not invoke si_meminfo, just get free/ram_pages in global. v2 cancel this __damos_get_wmark_free_mem_rate and just calculate rate in damos_wmark_metric_value to keep it simple.
Signed-off-by: Huan Yang <link@vivo.com> --- mm/damon/core.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/mm/damon/core.c b/mm/damon/core.c index bcd2bd9d6c10..a3f812d78267 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -1280,12 +1280,9 @@ 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; } -- 2.34.1
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