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=-7.1 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 DB79DC43461 for ; Fri, 4 Sep 2020 15:15:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A025C2074D for ; Fri, 4 Sep 2020 15:15:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=soleen.com header.i=@soleen.com header.b="ne+MMC5e" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730860AbgIDPO7 (ORCPT ); Fri, 4 Sep 2020 11:14:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38982 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730675AbgIDPOx (ORCPT ); Fri, 4 Sep 2020 11:14:53 -0400 Received: from mail-qk1-x744.google.com (mail-qk1-x744.google.com [IPv6:2607:f8b0:4864:20::744]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C8FA2C061244 for ; Fri, 4 Sep 2020 08:14:52 -0700 (PDT) Received: by mail-qk1-x744.google.com with SMTP id o5so6549919qke.12 for ; Fri, 04 Sep 2020 08:14:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=soleen.com; s=google; h=from:to:subject:date:message-id:mime-version :content-transfer-encoding; bh=47tZzOOPU5OLzSSR8h+IPPDqm4bQH2Jhd8l+lyN/6do=; b=ne+MMC5ehTbyPTFu0b4/QJtZHJSHOwOFyoNA04zMV+QdNJ7MRDbKqocQ6PuSTEq//Z 4SOO172pSbAMElslBAImMET5spGhsbAWbGv785iAv01gzR2gYmXijQVw5+i1zq8SPSfO /r6DhxyPqTcBK/aMnXL6ekuGAEVMRTxtxFkwAh7PlSRQbbO1LsSwl86C+HBNxPDC5NHe mJuHoZV/2w/hGkx+kTX1QwzT+yALNLPZabjolZsXy9dkIjhoM/jm7ndVBQogmSwPIMA3 5DEz3AkceB3XrZWejyFg6IKCM1FvHf4aA2anhTsGkBbs2qWLS3bYxTo/kXR6kugc37wF DpKQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:mime-version :content-transfer-encoding; bh=47tZzOOPU5OLzSSR8h+IPPDqm4bQH2Jhd8l+lyN/6do=; b=rJSfXTpFzeGQj78kMzKFS/TQjfugDzzl3iW2pcs6BLv3IOuNUnM3qDWmgkiXjFBm+v BbszTswAB9EIVeW/kgdAb58TIq674g3b+Sa835Z9WL6dvoEdy+ZwC0iTvwZFXwFblSwp 2YHcDfAhQzqcVblT1NS9VLJntWDc3Q37nWfi/BpTz9gaXaxyLRZTOuLEylCnj+/WMDC9 3xaPRONguEIajxXVqJ4Y7Bi6GVl8XgohbM/rFNSPsJ3Ag7OM/eQdBKDfaKDTOgzZQSyq roACM10HZ0h0w0TtoT1MIwWuQ5u2DAKOBd4qVRZFfFzrShGdXsga6FA3mtH5G0Y5Xm81 eZvw== X-Gm-Message-State: AOAM530PARjdACjBS2b7vFSXYaWiPBrn7ZWy62pHRxG2MFwAbiMXVY0Z 8MK0/tJqc7vxbWPjckECXJEevefHVPQnqw== X-Google-Smtp-Source: ABdhPJxV5fmTSbh6jIcNEATYImcWw+yW8zoZ+XFXvxb3xoSNP7q4LtcAc8QLiTYoeJqtQfYTNoAOjw== X-Received: by 2002:a37:67d2:: with SMTP id b201mr8239158qkc.96.1599232490598; Fri, 04 Sep 2020 08:14:50 -0700 (PDT) Received: from localhost.localdomain (c-73-69-118-222.hsd1.nh.comcast.net. [73.69.118.222]) by smtp.gmail.com with ESMTPSA id r21sm4802727qtj.80.2020.09.04.08.14.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 04 Sep 2020 08:14:49 -0700 (PDT) From: Pavel Tatashin To: linux-kernel@vger.kernel.org, akpm@linux-foundation.org, mhocko@suse.com, linux-mm@kvack.org, pasha.tatashin@soleen.com, osalvador@suse.de, richard.weiyang@gmail.com, david@redhat.com, vbabka@suse.cz, rientjes@google.com Subject: [PATCH v3 0/2] drain pcp outside of page isolation Date: Fri, 4 Sep 2020 11:14:46 -0400 Message-Id: <20200904151448.100489-1-pasha.tatashin@soleen.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Moved drain_all_pages() from start_isolate_page_range() to users. This makes it more efficient, symmetric, and solves the race condition. This is a proposal that I described in Version 1 thread, otherwise no changes to patch 1. Version 1: https://lore.kernel.org/lkml/20200901124615.137200-1-pasha.tatashin@soleen.com Version 2: https://lore.kernel.org/lkml/20200903140032.380431-1-pasha.tatashin@soleen.com Pavel Tatashin (2): mm/memory_hotplug: drain per-cpu pages again during memory offline mm: drain per-cpu pages outside of isolate_migratepages_range mm/memory_hotplug.c | 1 + mm/page_alloc.c | 2 ++ mm/page_isolation.c | 32 ++++++++++++-------------------- 3 files changed, 15 insertions(+), 20 deletions(-) -- 2.25.1