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 <[email protected]> --- 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
