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=-5.5 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 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 C4B29C49ED5 for ; Mon, 9 Sep 2019 09:56:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9C5F721BE5 for ; Mon, 9 Sep 2019 09:56:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=shutemov-name.20150623.gappssmtp.com header.i=@shutemov-name.20150623.gappssmtp.com header.b="y4Aem2zd" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390070AbfIIJ4M (ORCPT ); Mon, 9 Sep 2019 05:56:12 -0400 Received: from mail-ed1-f67.google.com ([209.85.208.67]:36084 "EHLO mail-ed1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729181AbfIIJ4M (ORCPT ); Mon, 9 Sep 2019 05:56:12 -0400 Received: by mail-ed1-f67.google.com with SMTP id f2so6021023edw.3 for ; Mon, 09 Sep 2019 02:56:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=shutemov-name.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=TkcuSrktiec/3aeNNPIPbr3CY/ViMiJEbi8XPnPDeFE=; b=y4Aem2zdEw/0MY0GP//C3Dw/NpPHTs0qKqdBb4xrcHA1pZ0xHXXvj9eCql7CFteyRf y4akVA0lJFLoGkrZCPbFNlfznQs3ZbJ9CWr+JuD8Z3kSt7xxylldudDPRN/rQfgO+vW6 4Pivn2PbcNEY2vN6cCwbQCaHwbvuTKNjsJxKXF06Q624NzL3x+QwiZ8yNorQ6D5vsCJf L8tqOz85eAHvcZKFkHNZDRJXs1a4nwiMxGa5yAOxiQQ8VFLx+6VaURSLOJbM9dRa4N2k Yb/2g2O7SVOnxZ7wb4kdBg3Pqci3bFH370K9sGIEGhXDnJaqKth32tPYECQ2HLF3tGdq JTsg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=TkcuSrktiec/3aeNNPIPbr3CY/ViMiJEbi8XPnPDeFE=; b=dnvZaFIT87qGZrg/pZrWKwPN1s18+YgcABnKtKQQkc3zBnwQqhiAf4/Bm1wknR7eCv G4AVnkJ82q4K68bA1VJHf0qfWht0ZoB1chbUIjdhwbSpJ2GyAtz9moTmF+rvn7M7laYF cnWyZNjnxBuQ6hQ5OEXBaKApALOsM2WQcQoaECgQ+Bh3+aL+JmbQwj+cwASNxY/ZtxMG 35qpbC8q8pUnpiFPOFcEvgngODoCw4EmNEyCA3dwix4pQm4zsVcuA5CWjmqNxgxDxO3m /Uxg5HbS9hQTxQN3vd2ApbHyri3pZSHzY3KmvATT03rKymWG+1gC/kFjhn8rNJNENbo1 u3BA== X-Gm-Message-State: APjAAAWh21p2avUzVwILmNr6e+aEh39hSm4g5G7fYfxIhnYNNRI8zcMx O6VgICE1aFNNEiWqtUFhUleSsQ== X-Google-Smtp-Source: APXvYqyRn+kl2/TWZQY25cP+eDKMrBVhD4QUydeucAx1gsJCDQV6FE+USGZXHlRVlnYWQyI9ItE3Qw== X-Received: by 2002:a17:906:5a8d:: with SMTP id l13mr18691711ejq.219.1568022970390; Mon, 09 Sep 2019 02:56:10 -0700 (PDT) Received: from box.localdomain ([86.57.175.117]) by smtp.gmail.com with ESMTPSA id d24sm2946102edp.88.2019.09.09.02.56.09 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 09 Sep 2019 02:56:09 -0700 (PDT) Received: by box.localdomain (Postfix, from userid 1000) id 7D24A1003B5; Mon, 9 Sep 2019 12:56:08 +0300 (+03) Date: Mon, 9 Sep 2019 12:56:08 +0300 From: "Kirill A. Shutemov" To: Alexander Duyck Cc: virtio-dev@lists.oasis-open.org, kvm@vger.kernel.org, mst@redhat.com, catalin.marinas@arm.com, david@redhat.com, dave.hansen@intel.com, linux-kernel@vger.kernel.org, willy@infradead.org, mhocko@kernel.org, linux-mm@kvack.org, akpm@linux-foundation.org, will@kernel.org, linux-arm-kernel@lists.infradead.org, osalvador@suse.de, yang.zhang.wz@gmail.com, pagupta@redhat.com, konrad.wilk@oracle.com, nitesh@redhat.com, riel@surriel.com, lcapitulino@redhat.com, wei.w.wang@intel.com, aarcange@redhat.com, ying.huang@intel.com, pbonzini@redhat.com, dan.j.williams@intel.com, fengguang.wu@intel.com, alexander.h.duyck@linux.intel.com, kirill.shutemov@linux.intel.com Subject: Re: [PATCH v9 3/8] mm: Move set/get_pcppage_migratetype to mmzone.h Message-ID: <20190909095608.jwachx3womhqmjbl@box> References: <20190907172225.10910.34302.stgit@localhost.localdomain> <20190907172528.10910.37051.stgit@localhost.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190907172528.10910.37051.stgit@localhost.localdomain> User-Agent: NeoMutt/20180716 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Sep 07, 2019 at 10:25:28AM -0700, Alexander Duyck wrote: > From: Alexander Duyck > > In order to support page reporting it will be necessary to store and > retrieve the migratetype of a page. To enable that I am moving the set and > get operations for pcppage_migratetype into the mm/internal.h header so > that they can be used outside of the page_alloc.c file. > > Reviewed-by: Dan Williams > Signed-off-by: Alexander Duyck I'm not sure that it's great idea to export this functionality beyond mm/page_alloc.c without any additional safeguards. How would we avoid to messing with ->index when the page is not in the right state of its life-cycle. Can we add some VM_BUG_ON()s here? -- Kirill A. Shutemov