在 2020/7/21 上午7:14, Andrew Morton 写道: >> --- a/mm/vmstat.c >> +++ b/mm/vmstat.c >> @@ -321,6 +321,9 @@ void __mod_zone_page_state(struct zone *zone, enum zone_stat_item item, >> long x; >> long t; >> >> + if (unlikely(!delta)) >> + return; >> + > Do we know that delta==0 is frequent enough to make the change a net > benefit? Uh,I check again. it seems no much place delta==0, forget this patch. Thanks Alex
