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=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 0A005C2BA15 for ; Thu, 2 Apr 2020 12:53:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D41CF20787 for ; Thu, 2 Apr 2020 12:53:05 +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="M/TGYKy1" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388398AbgDBMxE (ORCPT ); Thu, 2 Apr 2020 08:53:04 -0400 Received: from mail-lj1-f193.google.com ([209.85.208.193]:36681 "EHLO mail-lj1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388312AbgDBMxE (ORCPT ); Thu, 2 Apr 2020 08:53:04 -0400 Received: by mail-lj1-f193.google.com with SMTP id b1so3121751ljp.3 for ; Thu, 02 Apr 2020 05:53:03 -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; bh=VNWrHdXg3Yy9QNYyWfmhuoGwbW2EjORHJrKP3nYvVkI=; b=M/TGYKy160b2KdmNMklbl4hrVhVHNqk0kvQK+9tThJ1rU1a2MQk3iD/AlhWwsEuaXw Nd+jOxHYJrb3iSPKOQ8MK3YxO6YYAmzz2ty+XbNVahOvoPzLI18RfaxBUegH+8Jx1cBB WnacijaPfsK07Y46soJkrbDlin9Dk06zHBT192xpRFuG8SKfxtOl+kvabxwD/ePoBbzy lotjQsXtUWMDDINKn/r8Y04hhj58thTR0wRqF6p5i/jM2VORtlr5f+yLpzUd9405OgQs +KbVqLR0dncjQfOE7z+l1HFwQsD3vtMy2s7FfBn39hASuu/kfjkdtA/LMackkd+53gGr 88Gw== 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; bh=VNWrHdXg3Yy9QNYyWfmhuoGwbW2EjORHJrKP3nYvVkI=; b=OxM69KM6Zbb6sm2pQQlrHfotZ5NjnHv13O9pfuj+uwBIVXwpHec8xAAq3HzcM7D8G/ ioQpQP9cayDTl3Bxn0KnQqqgzb1K0R1X1JN4qyHwkqVNQNYKNdTkm/6Pt89UljSi5CkK 7omExCCmMl+WQVBxGIQBLTKQxo6O4TRK/1MIj4QzCPeEpMbpRA+JCdCcxbZ6lJb6RQev LOpPIEbcsRs4QoqwrcKdm1/fJ5zPHegJCo8eRGo+GrljMnF40KiwRcpaGS3qEDCNuPqD J4+YdLcqcE4UPT1vZJS/m8TJjrkyXyHULBmtKnODjPadx2HqcsXQkQ62sOqn4KTRLR4U wheQ== X-Gm-Message-State: AGi0PuZHsn3Hd/fpJuIwYZ+ek9AOqVdqCShaH9ZRmK1vFTu2malbNWEc cnC6hCQ9Dt9PX/Ph7pF0YwtuTM7pLR4= X-Google-Smtp-Source: APiQypKsnSMgPI+27x38wzO/S/ewac5zFRYA1l+vLUf8WoLmfmNvYKaBWkcP4JmWzGkuRlP5504YhQ== X-Received: by 2002:a05:651c:28a:: with SMTP id b10mr1968584ljo.223.1585831982476; Thu, 02 Apr 2020 05:53:02 -0700 (PDT) Received: from box.localdomain ([86.57.175.117]) by smtp.gmail.com with ESMTPSA id j2sm3799760lfm.44.2020.04.02.05.53.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 02 Apr 2020 05:53:01 -0700 (PDT) Received: by box.localdomain (Postfix, from userid 1000) id 334071020A6; Thu, 2 Apr 2020 15:53:01 +0300 (+03) Date: Thu, 2 Apr 2020 15:53:01 +0300 From: "Kirill A. Shutemov" To: Andrew Morton Cc: "Huang, Ying" , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Zi Yan , Andrea Arcangeli , "Kirill A . Shutemov" , Vlastimil Babka , Alexey Dobriyan , Michal Hocko , Konstantin Khlebnikov , =?utf-8?B?SsOpcsO0bWU=?= Glisse , Yang Shi Subject: Re: [PATCH -V2] /proc/PID/smaps: Add PMD migration entry parsing Message-ID: <20200402125301.mtngw2toytiohkee@box> References: <20200402020031.1611223-1-ying.huang@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200402020031.1611223-1-ying.huang@intel.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Apr 02, 2020 at 10:00:31AM +0800, Huang, Ying wrote: > From: Huang Ying > > Now, when read /proc/PID/smaps, the PMD migration entry in page table is simply > ignored. To improve the accuracy of /proc/PID/smaps, its parsing and processing > is added. > > Before the patch, for a fully populated 400 MB anonymous VMA, sometimes some THP > pages under migration may be lost as follows. > > 7f3f6a7e5000-7f3f837e5000 rw-p 00000000 00:00 0 > Size: 409600 kB > KernelPageSize: 4 kB > MMUPageSize: 4 kB > Rss: 407552 kB > Pss: 407552 kB > Shared_Clean: 0 kB > Shared_Dirty: 0 kB > Private_Clean: 0 kB > Private_Dirty: 407552 kB > Referenced: 301056 kB > Anonymous: 407552 kB > LazyFree: 0 kB > AnonHugePages: 405504 kB > ShmemPmdMapped: 0 kB > FilePmdMapped: 0 kB The alignment makes me triggered. Andrew, could you please apply this patch: http://lore.kernel.org/r/20191230084125.267040-1-samuel.williams@oriontransfer.co.nz -- Kirill A. Shutemov