Messages in this thread | | | Subject | Re: [PATCH] mm/vmstat: don't do count if no needs | From | Alex Shi <> | Date | Tue, 21 Jul 2020 11:07:48 +0800 |
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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
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