From patchwork Fri Aug 7 06:25:58 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Morton X-Patchwork-Id: 11704935 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id DB3DA14B7 for ; Fri, 7 Aug 2020 06:26:13 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id A693E22D0A for ; Fri, 7 Aug 2020 06:26:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="o0rRsH6K" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A693E22D0A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 77F8C8D0085; Fri, 7 Aug 2020 02:26:12 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 68E688D0026; Fri, 7 Aug 2020 02:26:12 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 4E4718D0085; Fri, 7 Aug 2020 02:26:12 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0180.hostedemail.com [216.40.44.180]) by kanga.kvack.org (Postfix) with ESMTP id 39C528D0026 for ; Fri, 7 Aug 2020 02:26:12 -0400 (EDT) Received: from smtpin30.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 3BCAC181AEF1E for ; Fri, 7 Aug 2020 06:26:03 +0000 (UTC) X-FDA: 77122787406.30.need70_4817dc826fbe Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin30.hostedemail.com (Postfix) with ESMTP id 11976180B3C83 for ; Fri, 7 Aug 2020 06:26:03 +0000 (UTC) X-Spam-Summary: 50,0,0,38065c4e3017a764,d41d8cd98f00b204,akpm@linux-foundation.org,,RULES_HIT:41:355:379:800:960:966:967:973:981:988:989:1260:1263:1345:1359:1381:1431:1437:1534:1541:1711:1730:1747:1777:1792:2196:2198:2199:2200:2393:2525:2560:2563:2682:2685:2731:2859:2902:2933:2937:2939:2942:2945:2947:2951:2954:3022:3138:3139:3140:3141:3142:3352:3865:3866:3867:3868:3871:3934:3936:3938:3941:3944:3947:3950:3953:3956:3959:4321:4385:5007:6261:6653:7576:8599:9025:9545:10004:10913:11658:11914:12043:12048:12297:12517:12519:12555:12679:12783:12986:13069:13311:13357:14181:14384:14721:14849:21080:21451:21627:21939:30054,0,RBL:none,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:none,Custom_rules:0:0:0,LFtime:6,LUA_SUMMARY:none X-HE-Tag: need70_4817dc826fbe X-Filterd-Recvd-Size: 2608 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf31.hostedemail.com (Postfix) with ESMTP for ; Fri, 7 Aug 2020 06:26:02 +0000 (UTC) Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 92E2E22CAE; Fri, 7 Aug 2020 06:25:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596781558; bh=B4u3/7m1qpu/zy/YSXhr99cRUqeBVHYzNXa4WKkkhVc=; h=Date:From:To:Subject:In-Reply-To:From; b=o0rRsH6KomA914+cYqJPMMOWJfmLNTZvMKHQ3c4KeInU3m8FU+/aI4uDxG1kVMsDN l/hug2uGm7mobwBYR/82MshhjR5c+5+rLU5LGCFjL7nVtOwew24G8Y/SkDQur6ldlU 34smeS6DFOgKTFkFzfO7/wXyQ3bSGtdoMVlj8zY0= Date: Thu, 06 Aug 2020 23:25:58 -0700 From: Andrew Morton To: akpm@linux-foundation.org, david@redhat.com, linux-mm@kvack.org, mm-commits@vger.kernel.org, richard.weiyang@linux.alibaba.com, torvalds@linux-foundation.org Subject: [patch 153/163] mm/page_alloc: fallbacks at most has 3 elements Message-ID: <20200807062558.ui4uGHaCT%akpm@linux-foundation.org> In-Reply-To: <20200806231643.a2711a608dd0f18bff2caf2b@linux-foundation.org> User-Agent: s-nail v14.8.16 X-Rspamd-Queue-Id: 11976180B3C83 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam05 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Wei Yang Subject: mm/page_alloc: fallbacks at most has 3 elements MIGRAGE_TYPES is used to be the mark of end and there are at most 3 elements for the one dimension array. Reduce to 3 to save little memory. Link: http://lkml.kernel.org/r/20200625231022.18784-1-richard.weiyang@linux.alibaba.com Signed-off-by: Wei Yang Reviewed-by: David Hildenbrand Signed-off-by: Andrew Morton --- mm/page_alloc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/page_alloc.c~mm-page_alloc-fallbacks-at-most-has-3-elements +++ a/mm/page_alloc.c @@ -2268,7 +2268,7 @@ struct page *__rmqueue_smallest(struct z * This array describes the order lists are fallen back to when * the free lists for the desirable migrate type are depleted */ -static int fallbacks[MIGRATE_TYPES][4] = { +static int fallbacks[MIGRATE_TYPES][3] = { [MIGRATE_UNMOVABLE] = { MIGRATE_RECLAIMABLE, MIGRATE_MOVABLE, MIGRATE_TYPES }, [MIGRATE_MOVABLE] = { MIGRATE_RECLAIMABLE, MIGRATE_UNMOVABLE, MIGRATE_TYPES }, [MIGRATE_RECLAIMABLE] = { MIGRATE_UNMOVABLE, MIGRATE_MOVABLE, MIGRATE_TYPES },