From: Yue Hu <huyue2@xxxxxxxxxxx>
The patch removes the needless scale in existing caluation, it
makes the calculation more simple and more effective.
Signed-off-by: Yue Hu <huyue2@xxxxxxxxxxx>
---
mm/vmpressure.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/mm/vmpressure.c b/mm/vmpressure.c
index 6063581..174b2f0 100644
--- a/mm/vmpressure.c
+++ b/mm/vmpressure.c
@@ -111,7 +111,6 @@ static enum vmpressure_levels vmpressure_level(unsigned long pressure)
static enum vmpressure_levels vmpressure_calc_level(unsigned long scanned,
unsigned long reclaimed)
{
- unsigned long scale = scanned + reclaimed;
unsigned long pressure = 0;
/*
@@ -128,8 +127,7 @@ static enum vmpressure_levels vmpressure_calc_level(unsigned long scanned,
* scanned. This makes it possible to set desired reaction time
* and serves as a ratelimit.
*/
- pressure = scale - (reclaimed * scale / scanned);
- pressure = pressure * 100 / scale;
+ pressure = (scanned - reclaimed) * 100 / scanned;
out:
pr_debug("%s: %3lu (s: %lu r: %lu)\n", __func__, pressure,
--
1.9.1
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