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=-6.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=no 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 D8547C43461 for ; Mon, 7 Sep 2020 16:36:46 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 6F44421D95 for ; Mon, 7 Sep 2020 16:36:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6F44421D95 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 53D118E0005; Mon, 7 Sep 2020 12:36:45 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 4C4698E0001; Mon, 7 Sep 2020 12:36:45 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 364FF6B0062; Mon, 7 Sep 2020 12:36:45 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0215.hostedemail.com [216.40.44.215]) by kanga.kvack.org (Postfix) with ESMTP id 1626B6B0055 for ; Mon, 7 Sep 2020 12:36:45 -0400 (EDT) Received: from smtpin08.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id CF6ED180AD81A for ; Mon, 7 Sep 2020 16:36:44 +0000 (UTC) X-FDA: 77236819128.08.plot68_39046fb270cd Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin08.hostedemail.com (Postfix) with ESMTP id A2DAD1819E769 for ; Mon, 7 Sep 2020 16:36:44 +0000 (UTC) X-HE-Tag: plot68_39046fb270cd X-Filterd-Recvd-Size: 2208 Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) by imf23.hostedemail.com (Postfix) with ESMTP for ; Mon, 7 Sep 2020 16:36:44 +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 2D76DB00E; Mon, 7 Sep 2020 16:36:43 +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: [RFC 0/5] disable pcplists during page isolation Date: Mon, 7 Sep 2020 18:36:23 +0200 Message-Id: <20200907163628.26495-1-vbabka@suse.cz> X-Mailer: git-send-email 2.28.0 MIME-Version: 1.0 X-Rspamd-Queue-Id: A2DAD1819E769 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam05 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: As per the discussions [1] [2] this is an attempt to implement David's suggestion that page isolation should disable pcplists to avoid races. Th= is is done without extra checks in fast paths, as I mentioned should be possibl= e in the discussion, and explained in patch 5. Patches 1-4 are preparatory cle= anups. Note this is untested RFC for now. Based on v5.9-rc4 plus Pavel's patch [= 2] (slated as a quick fix for mainline+stable). [1] https://lore.kernel.org/linux-mm/20200901124615.137200-1-pasha.tatash= in@soleen.com/ [2] https://lore.kernel.org/linux-mm/20200903140032.380431-1-pasha.tatash= in@soleen.com/ Vlastimil Babka (5): mm, page_alloc: clean up pageset high and batch update mm, page_alloc: calculate pageset high and batch once per zone mm, page_alloc(): remove setup_pageset() mm, page_alloc: cache pageset high and batch in struct zone mm, page_alloc: disable pcplists during page isolation include/linux/gfp.h | 1 + include/linux/mmzone.h | 2 + mm/internal.h | 4 ++ mm/memory_hotplug.c | 24 +++---- mm/page_alloc.c | 138 ++++++++++++++++++++++------------------- mm/page_isolation.c | 45 +++++++++++--- 6 files changed, 127 insertions(+), 87 deletions(-) --=20 2.28.0