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Date: Sun, 17 Sep 2017 21:13:13 -0700 From: Dave Hansen <dave.hansen@...ux.intel.com> To: kemi <kemi.wang@...el.com>, Michal Hocko <mhocko@...nel.org> Cc: "Luis R . Rodriguez" <mcgrof@...nel.org>, Kees Cook <keescook@...omium.org>, Andrew Morton <akpm@...ux-foundation.org>, Jonathan Corbet <corbet@....net>, Mel Gorman <mgorman@...hsingularity.net>, Johannes Weiner <hannes@...xchg.org>, Christopher Lameter <cl@...ux.com>, Sebastian Andrzej Siewior <bigeasy@...utronix.de>, Vlastimil Babka <vbabka@...e.cz>, Tim Chen <tim.c.chen@...el.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>, Proc sysctl <linux-fsdevel@...r.kernel.org>, Linux MM <linux-mm@...ck.org>, Linux Kernel <linux-kernel@...r.kernel.org> Subject: Re: [PATCH 2/3] mm: Handle numa statistics distinctively based-on different VM stats modes On 09/17/2017 08:07 PM, kemi wrote: >>> + if (vmstat_mode) { >>> + if (vmstat_mode == VMSTAT_COARSE_MODE) >>> + return; >>> + } else if (disable_zone_statistics) >>> + return; >>> + >>> if (z->node != numa_node_id()) >>> local_stat = NUMA_OTHER; >> >> A jump label could make this completely out of the way for the case >> where every single cycle matters. > > Could you be more explicit for how to implement it here. Thanks very much. Take a look at include/linux/jump_label.h.
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