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[209.85.220.41]) by mx.google.com with SMTPS id p66sor12444378pga.76.2019.03.24.20.10.57 for (Google Transport Security); Sun, 24 Mar 2019 20:10:57 -0700 (PDT) Received-SPF: pass (google.com: domain of joel@joelfernandes.org designates 209.85.220.41 as permitted sender) client-ip=209.85.220.41; Authentication-Results: mx.google.com; dkim=pass header.i=@joelfernandes.org header.s=google header.b=QRp6gXYh; spf=pass (google.com: domain of joel@joelfernandes.org designates 209.85.220.41 as permitted sender) smtp.mailfrom=joel@joelfernandes.org DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=joelfernandes.org; s=google; h=date:from:to:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=XvFuk1ZULvnL/gHmZQiHeVYELloI7dJAf4pxrQoUf0w=; b=QRp6gXYhcs1Uhuq8SNRZfOJ+XY5kjThhvW5f2e0yvCJPSST+OUjbFRUhw5gNREYqnL oNrr35PCDWTmWS095LfNgQEgt9ieX21a9Q9S1FM29wTD0zRGijyh0TfNL7bwzdOpgbcO 9ab53+XY3o+fMCLtBOHTo8CE9dJ2F/jcD8W8o= X-Google-Smtp-Source: APXvYqwhnGXSIS7/l9PxbL58eixk1pzks0Vb5JWmyyrQHCbQt2SQ4cAFRBfjH+FejfgJS8F+3z3Jbg== X-Received: by 2002:a63:2106:: with SMTP id h6mr20970114pgh.441.1553483457384; Sun, 24 Mar 2019 20:10:57 -0700 (PDT) Received: from localhost ([2620:15c:6:12:9c46:e0da:efbf:69cc]) by smtp.gmail.com with ESMTPSA id h64sm23428744pfj.40.2019.03.24.20.10.56 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Sun, 24 Mar 2019 20:10:56 -0700 (PDT) Date: Sun, 24 Mar 2019 23:10:55 -0400 From: Joel Fernandes To: Christian Hansen , "open list:MEMORY MANAGEMENT" , Andrew Morton Subject: Re: idle-page marking in page-types tool Message-ID: <20190325031055.GA51047@google.com> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) 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: Hi, Ping? Thanks a lot. On Fri, Mar 15, 2019 at 08:32:18AM -0700, Joel Fernandes wrote: > Hi Christian, > I am looking into idle page tracking and noticed the page-types tool > in tools/vm/. It seems you are only marking pages as idle if the -f > option is passed ("Walk file address space"). > > I was curious why you decided do the marking of idle pages only for > files and not anonymous pages? > As doing in the following code: > if (opt_mark_idle && opt_file) > page_idle_fd = checked_open(SYS_KERNEL_MM_PAGE_IDLE, O_RDWR); > > We mainly want to do idle page tracking for anonymous regions to > determine howmuch of its anonymous memory is a process really using > actively. > > But I was curious what was the reason you did it this way? > > thanks, > - Joel >