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=-12.7 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 21FADC46466 for ; Thu, 8 Oct 2020 11:42:14 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 9FA9F20B1F for ; Thu, 8 Oct 2020 11:42:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9FA9F20B1F 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 A0BB56B005D; Thu, 8 Oct 2020 07:42:10 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 7DD4F6B0072; Thu, 8 Oct 2020 07:42:10 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 455336B0068; Thu, 8 Oct 2020 07:42:10 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0132.hostedemail.com [216.40.44.132]) by kanga.kvack.org (Postfix) with ESMTP id 0F393900002 for ; Thu, 8 Oct 2020 07:42:10 -0400 (EDT) Received: from smtpin28.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 9E1AC1EE6 for ; Thu, 8 Oct 2020 11:42:09 +0000 (UTC) X-FDA: 77348569578.28.vase38_4b0b5ff271d7 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin28.hostedemail.com (Postfix) with ESMTP id 5F78B6C11 for ; Thu, 8 Oct 2020 11:42:09 +0000 (UTC) X-HE-Tag: vase38_4b0b5ff271d7 X-Filterd-Recvd-Size: 4607 Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) by imf43.hostedemail.com (Postfix) with ESMTP for ; Thu, 8 Oct 2020 11:42:08 +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 8290BAFCF; Thu, 8 Oct 2020 11:42:07 +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 , Michal Hocko Subject: [PATCH v2 2/7] mm, page_alloc: calculate pageset high and batch once per zone Date: Thu, 8 Oct 2020 13:41:56 +0200 Message-Id: <20201008114201.18824-3-vbabka@suse.cz> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201008114201.18824-1-vbabka@suse.cz> References: <20201008114201.18824-1-vbabka@suse.cz> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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: 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 Acked-by: Michal Hocko --- 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 81f360c0d9fc..463f40b12aca 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -6295,13 +6295,14 @@ 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; @@ -6313,23 +6314,25 @@ 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 /* @@ -8063,15 +8066,6 @@ 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 @@ -8104,7 +8098,7 @@ 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; @@ -8711,7 +8705,7 @@ 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