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Date: Fri, 25 Aug 2017 09:04:37 +0100 From: Mel Gorman <mgorman@...hsingularity.net> To: Kemi Wang <kemi.wang@...el.com> Cc: Andrew Morton <akpm@...ux-foundation.org>, Michal Hocko <mhocko@...e.com>, Johannes Weiner <hannes@...xchg.org>, Christopher Lameter <cl@...ux.com>, Dave <dave.hansen@...ux.intel.com>, Andi Kleen <andi.kleen@...el.com>, Jesper Dangaard Brouer <brouer@...hat.com>, Ying Huang <ying.huang@...el.com>, Aaron Lu <aaron.lu@...el.com>, Tim Chen <tim.c.chen@...el.com>, Linux MM <linux-mm@...ck.org>, Linux Kernel <linux-kernel@...r.kernel.org> Subject: Re: [PATCH v2 0/3] Separate NUMA statistics from zone statistics On Thu, Aug 24, 2017 at 05:59:58PM +0800, Kemi Wang wrote: > Each page allocation updates a set of per-zone statistics with a call to > zone_statistics(). As discussed in 2017 MM summit, these are a substantial > source of overhead in the page allocator and are very rarely consumed. This > significant overhead in cache bouncing caused by zone counters (NUMA > associated counters) update in parallel in multi-threaded page allocation > (pointed out by Dave Hansen). > For the series; Acked-by: Mel Gorman <mgorman@...hsingularity.net> -- Mel Gorman SUSE Labs
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