From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 67CE3C2D0E2 for ; Tue, 22 Sep 2020 14:37:24 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 053CE2399A for ; Tue, 22 Sep 2020 14:37:23 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 053CE2399A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.cz Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id A7B14900093; Tue, 22 Sep 2020 10:37:22 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 92D33900092; Tue, 22 Sep 2020 10:37:22 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 7E965900096; Tue, 22 Sep 2020 10:37:22 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0061.hostedemail.com [216.40.44.61]) by kanga.kvack.org (Postfix) with ESMTP id 57F4F900086 for ; Tue, 22 Sep 2020 10:37:22 -0400 (EDT) Received: from smtpin07.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 111C63628 for ; Tue, 22 Sep 2020 14:37:22 +0000 (UTC) X-FDA: 77290950324.07.rain73_580717e2714e Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin07.hostedemail.com (Postfix) with ESMTP id E1D4D1803F9A3 for ; Tue, 22 Sep 2020 14:37:21 +0000 (UTC) X-HE-Tag: rain73_580717e2714e X-Filterd-Recvd-Size: 4528 Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) by imf46.hostedemail.com (Postfix) with ESMTP for ; Tue, 22 Sep 2020 14:37:21 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 01803B08C; Tue, 22 Sep 2020 14:37:57 +0000 (UTC) From: Vlastimil Babka To: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org, Michal Hocko , Pavel Tatashin , David Hildenbrand , Oscar Salvador , Joonsoo Kim , Vlastimil Babka Subject: [PATCH 2/9] mm, page_alloc: calculate pageset high and batch once per zone Date: Tue, 22 Sep 2020 16:37:05 +0200 Message-Id: <20200922143712.12048-3-vbabka@suse.cz> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200922143712.12048-1-vbabka@suse.cz> References: <20200922143712.12048-1-vbabka@suse.cz> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000001, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: We currently call pageset_set_high_and_batch() for each possible cpu, whi= ch repeats the same calculations of high and batch values. Instead call the function just once per zone, and make it apply the calcu= lated values to all per-cpu pagesets of the zone. This also allows removing the zone_pageset_init() and __zone_pcp_update() wrappers. No functional change. Signed-off-by: Vlastimil Babka Reviewed-by: Oscar Salvador Reviewed-by: David Hildenbrand --- mm/page_alloc.c | 42 ++++++++++++++++++------------------------ 1 file changed, 18 insertions(+), 24 deletions(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index a163c5e561f2..26069c8d1b19 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -6219,13 +6219,14 @@ static void setup_pageset(struct per_cpu_pageset = *p) } =20 /* - * Calculate and set new high and batch values for given per-cpu pageset= of a + * Calculate and set new high and batch values for all per-cpu pagesets = of a * zone, based on the zone's size and the percpu_pagelist_fraction sysct= l. */ -static void pageset_set_high_and_batch(struct zone *zone, - struct per_cpu_pageset *p) +static void zone_set_pageset_high_and_batch(struct zone *zone) { unsigned long new_high, new_batch; + struct per_cpu_pageset *p; + int cpu; =20 if (percpu_pagelist_fraction) { new_high =3D zone_managed_pages(zone) / percpu_pagelist_fraction; @@ -6237,23 +6238,25 @@ static void pageset_set_high_and_batch(struct zon= e *zone, new_high =3D 6 * new_batch; new_batch =3D max(1UL, 1 * new_batch); } - pageset_update(&p->pcp, new_high, new_batch); -} - -static void __meminit zone_pageset_init(struct zone *zone, int cpu) -{ - struct per_cpu_pageset *pcp =3D per_cpu_ptr(zone->pageset, cpu); =20 - pageset_init(pcp); - pageset_set_high_and_batch(zone, pcp); + for_each_possible_cpu(cpu) { + p =3D per_cpu_ptr(zone->pageset, cpu); + pageset_update(&p->pcp, new_high, new_batch); + } } =20 void __meminit setup_zone_pageset(struct zone *zone) { + struct per_cpu_pageset *p; int cpu; + zone->pageset =3D alloc_percpu(struct per_cpu_pageset); - for_each_possible_cpu(cpu) - zone_pageset_init(zone, cpu); + for_each_possible_cpu(cpu) { + p =3D per_cpu_ptr(zone->pageset, cpu); + pageset_init(p); + } + + zone_set_pageset_high_and_batch(zone); } =20 /* @@ -7985,15 +7988,6 @@ int lowmem_reserve_ratio_sysctl_handler(struct ctl= _table *table, int write, return 0; } =20 -static void __zone_pcp_update(struct zone *zone) -{ - unsigned int cpu; - - for_each_possible_cpu(cpu) - pageset_set_high_and_batch(zone, - per_cpu_ptr(zone->pageset, cpu)); -} - /* * percpu_pagelist_fraction - changes the pcp->high for each zone on eac= h * cpu. It is the fraction of total pages in each zone that a hot per c= pu @@ -8026,7 +8020,7 @@ int percpu_pagelist_fraction_sysctl_handler(struct = ctl_table *table, int write, goto out; =20 for_each_populated_zone(zone) - __zone_pcp_update(zone); + zone_set_pageset_high_and_batch(zone); out: mutex_unlock(&pcp_batch_high_lock); return ret; @@ -8633,7 +8627,7 @@ EXPORT_SYMBOL(free_contig_range); void __meminit zone_pcp_update(struct zone *zone) { mutex_lock(&pcp_batch_high_lock); - __zone_pcp_update(zone); + zone_set_pageset_high_and_batch(zone); mutex_unlock(&pcp_batch_high_lock); } =20 --=20 2.28.0