This reverts commit e1587a4945408faa58d0485002c110eb2454740c.
THP lru page is reclaimed , THP is split to normal page and loop again.
reclaimed pages should not be bigger than nr_scan. because of each
loop will increase nr_scan counter.
Signed-off-by: zhongjiang <zhongjiang@xxxxxxxxxx>
---
mm/vmpressure.c | 10 +---------
1 file changed, 1 insertion(+), 9 deletions(-)
diff --git a/mm/vmpressure.c b/mm/vmpressure.c
index 6063581..149fdf6 100644
--- a/mm/vmpressure.c
+++ b/mm/vmpressure.c
@@ -112,16 +112,9 @@ static enum vmpressure_levels vmpressure_calc_level(unsigned long scanned,
unsigned long reclaimed)
{
unsigned long scale = scanned + reclaimed;
- unsigned long pressure = 0;
+ unsigned long pressure;
/*
- * reclaimed can be greater than scanned in cases
- * like THP, where the scanned is 1 and reclaimed
- * could be 512
- */
- if (reclaimed >= scanned)
- goto out;
- /*
* We calculate the ratio (in percents) of how many pages were
* scanned vs. reclaimed in a given time frame (window). Note that
* time is in VM reclaimer's "ticks", i.e. number of pages
@@ -131,7 +124,6 @@ static enum vmpressure_levels vmpressure_calc_level(unsigned long scanned,
pressure = scale - (reclaimed * scale / scanned);
pressure = pressure * 100 / scale;
-out:
pr_debug("%s: %3lu (s: %lu r: %lu)\n", __func__, pressure,
scanned, reclaimed);
--
1.7.12.4
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