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=-2.3 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FAKE_REPLY_C,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT 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 9881FC070C3 for ; Wed, 12 Sep 2018 23:02:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 38C6E20839 for ; Wed, 12 Sep 2018 23:02:19 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="XQZJwS8v" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 38C6E20839 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726625AbeIMEI5 (ORCPT ); Thu, 13 Sep 2018 00:08:57 -0400 Received: from mail-wr1-f47.google.com ([209.85.221.47]:42196 "EHLO mail-wr1-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726373AbeIMEI5 (ORCPT ); Thu, 13 Sep 2018 00:08:57 -0400 Received: by mail-wr1-f47.google.com with SMTP id v17-v6so3670169wrr.9 for ; Wed, 12 Sep 2018 16:02:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:mime-version:content-disposition :user-agent; bh=XlolwNdnXfu08pxexsrWwZrtMYsBrJu8y6D5Jo0DqZs=; b=XQZJwS8v/d8DwGaDa5rN9HBhBTCUC93UDZ2JeMAl/wSOjIHY4ci33H4EQiA+gxP5m4 v0L3S7bXleGAeIlNexuXwBVnvZNuRh99CWpmzRpSVqSiyN5/5d9Jq7vVQHPnPqBL12YP vCzuq5S439fjaAx4lm3sqox6dD9KQKN2UsTHcaCfu7loYw4G7K36XY1+6GL5bFBdhRAF JiHnD88aZGfucLgxOjCQWj+NMQD1qddC3OB68LmcRGgllHVnctNeKZncBx5q2sjtaWkG yey2dXZQmcmokJwblImTac7J+AJTrdnALzSfJs6qMEXfLoQL+dS3V6nWtR6CyRqQfGHx 2uOQ== 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:mime-version :content-disposition:user-agent; bh=XlolwNdnXfu08pxexsrWwZrtMYsBrJu8y6D5Jo0DqZs=; b=tDEsHerrpmbAnZSBAAchacsuVzeHVPzVnPj/9wxeTccbInCuPZiAtcaKq5lIR8QekQ eKmALOXKMh/IGpd+4+NwpD+lbNli+Rg1H0OarSBgr+cUgGrWNE2BOO5QMzfaZZ6uuCct O+GUK0ylNDGGMOEKSeF7XdBV11Cq7HoRDYRhVp8h5/kfwcqL0V5AQJ+qsBE7UZWyYpTm vlVVPiGiE8IJPO9RbY9cbv06kkMDXfNGoBeU6cwDg18b0fxE4l9TzomC+oCVABqYNxcD EhvCOXg3iarF5G9mJ1wKkR685crYjKQozEjWIywdgC9CVarPWOl6YOpmtsbhvxCrI556 7BGw== X-Gm-Message-State: APzg51ClPIBSjf3SpOrB3Evf/nemGUcreINmGhtyeDh21QBFtVwn8tOA M93Q2AHdJpVUj3MQDsj5CA== X-Google-Smtp-Source: ANB0VdYFJ2YfFVNt1KFO+k/+mo3UyHA51Eh0IpK2mavrkSjbdrF5qbyHX05BUYzu9M60CAnq2W5qwQ== X-Received: by 2002:a5d:62c2:: with SMTP id o2-v6mr3427980wrv.83.1536793335209; Wed, 12 Sep 2018 16:02:15 -0700 (PDT) Received: from avx2 (nat4-minsk-pool-46-53-177-92.telecom.by. [46.53.177.92]) by smtp.gmail.com with ESMTPSA id h82-v6sm1600873wme.11.2018.09.12.16.02.14 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 12 Sep 2018 16:02:14 -0700 (PDT) Date: Thu, 13 Sep 2018 02:02:12 +0300 From: Alexey Dobriyan To: prakash.sangappa@oracle.com Cc: linux-kernel@vger.kernel.org, mhocko@kernel.org, dave.hansen@intel.com, cl@linux.com, khandual@linux.vnet.ibm.com Subject: Re: [RFC PATCH] Add /proc//numa_vamaps for numa node information Message-ID: <20180912230212.GA6567@avx2> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > The /proc/pid/numa_vamaps shows mapped address ranges to numa node id > from where the physical pages are allocated. All these files make the problem with useless dentry and /proc/*/* inode instantiations worse (unlike top level /proc/* files which are tolerable). > +address-range numa-node-id > + > +00400000-00410000 N1 > +00410000-0047f000 N0 > +0047f000-00480000 N2 > +00480000-00481000 - > +00481000-004a0000 N0 > +004a0000-004a2000 - > +004a2000-004aa000 N2 > +004aa000-004ad000 N0 > +004ad000-004ae000 - 'N' is useless data. Parsing with awk won't work because field #3 is separated with space but field #2 with '-'. %08lx-%08lx kind of sucks: 32-bit get aligned data so parsing can be faster by pointing to &p[8+1] but not on 64-bit. If scanf("%lx-%lx") is used then leading zeroes are useless. Text is harder than it looks. Please in the name of everything holy add new honest system call.