From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-364912-1525451312-2-9951839674187521487 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no ("Email failed DMARC policy for domain") X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.249, MAILING_LIST_MULTI -1, RCVD_IN_DNSWL_HI -5, UNPARSEABLE_RELAY 0.001, LANGUAGES en, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='US', FromHeader='com', MailFrom='org' X-Spam-charsets: plain='utf-8' X-IgnoreVacation: yes ("Email failed DMARC policy for domain") X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: linux-api-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=fm2; t= 1525451312; b=Mdx4xG3f152tx0wVGf6YvoUuXbpmSRJpK2YPMpZUNuuPZRrCAU VPb/yVx+cw7eF4H0MSwTAr15xG3VsqdH+moZ9Tw/axUaRjEwnEeYAUw40vcm8MVE nBu2zqREIOnEgUQ21W0CUt61MsRhLOjhDAdw32RmPEy1vaAWdAiJzJkjN9UMdMfn 9cv4Q9xZ4LRdTNVWvUeYiHH8rXLCR/mAoqvxciJMnzvE+HKeiBbbY2CM6KF9MOO8 ziZKmyrgH/Cc+B6hQlCzEF0F7MoLrXiYTHLPKHI4lnfMpsAq1JdCFNF5pFAMRi30 hRhfnO/hHdkq3zP+IOGJTVQFO1uFhzx3Nz3g== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=subject:to:cc:references:from:message-id :date:mime-version:in-reply-to:content-type :content-transfer-encoding:sender:list-id; s=fm2; t=1525451312; bh=3iGbrYM9uVfK8W3Fq9OWRiSmnURhBE0prGcov1OseVg=; b=kEitgF0kEyPS uEPHQWhgJ+hyC/k0sAqeruRMd5vR+IqvguR+OPFk9ZBhe6ZdbRFk79Ps3gPKtJgo 7y234c7B/QuiOQZ+gZJp0dHyxNj52S9LXlOKLsy64VoCG1l7v/x56d7s5i0LudHU pN/NLxBWAYrBfqYvO8N4nMk/YPfq8mzGtzAyjKujhJLUzawdAMha6kGQ5lY7MfdP EWro30s3ep/LVvCE+rx4Q8vdNBaxSROR9kja7wPlmCf2G9NnFkfmkK4PFRIyFIme hVJ4mIn37WKxyWgyyJTuAxqut68y+egZj12E8qD12rsNf/IibgsaETLB1NRpczMR 38unlGB5mQ== ARC-Authentication-Results: i=1; mx4.messagingengine.com; arc=none (no signatures found); dkim=fail (body has been altered, 2048-bit rsa key sha256) header.d=oracle.com header.i=@oracle.com header.b=CiTvXpKB x-bits=2048 x-keytype=rsa x-algorithm=sha256 x-selector=corp-2017-10-26; dmarc=fail (p=none,has-list-id=yes,d=none) header.from=oracle.com; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=linux-api-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-cm=none score=0; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=oracle.com header.result=pass header_is_org_domain=yes; x-vs=clean score=-100 state=0 Authentication-Results: mx4.messagingengine.com; arc=none (no signatures found); dkim=fail (body has been altered, 2048-bit rsa key sha256) header.d=oracle.com header.i=@oracle.com header.b=CiTvXpKB x-bits=2048 x-keytype=rsa x-algorithm=sha256 x-selector=corp-2017-10-26; dmarc=fail (p=none,has-list-id=yes,d=none) header.from=oracle.com; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=linux-api-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-cm=none score=0; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=oracle.com header.result=pass header_is_org_domain=yes; x-vs=clean score=-100 state=0 X-ME-VSCategory: clean X-CM-Envelope: MS4wfLaOQ/vSV+Cdu7Ljzdkv60i98X8aAWIAXvUIUezHK5K0Fmt5f88o3LtmA844D/onom9oX7jcYcNjct4mYFjsXcX0bGWEE5rw9YUO5S+IeWsIs61wtN6j uOLyJHUI0rT33bW6JcqXpmmCh534e4zmGdby/TXx/jdTzBUTAk46L7ljOUHyTFMrAhcCM91x1SoDCKncClb1/TFZSDZN4rwlmoYv8dVpBDDRbCkpc89BqPV+ X-CM-Analysis: v=2.3 cv=JLoVTfCb c=1 sm=1 tr=0 a=UK1r566ZdBxH71SXbqIOeA==:117 a=UK1r566ZdBxH71SXbqIOeA==:17 a=IkcTkHD0fZMA:10 a=VUJBJC2UJ8kA:10 a=VwQbUJbxAAAA:8 a=aBfg-QOMA2m-Cb59uqwA:9 a=QOdM2GFKByV4LuyS:21 a=dFpdumnS3Av_G0PV:21 a=QEXdDO2ut3YA:10 a=x8gzFH9gYPwA:10 a=AjGcO6oz07-iQ99wixmX:22 X-ME-CMScore: 0 X-ME-CMCategory: none Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751492AbeEDQ23 (ORCPT ); Fri, 4 May 2018 12:28:29 -0400 Received: from aserp2130.oracle.com ([141.146.126.79]:33164 "EHLO aserp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751425AbeEDQ22 (ORCPT ); Fri, 4 May 2018 12:28:28 -0400 Subject: Re: [RFC PATCH] Add /proc//numa_vamaps for numa node information To: Christopher Lameter Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-api@vger.kernel.org, akpm@linux-foundation.org, mhocko@suse.com, kirill.shutemov@linux.intel.com, n-horiguchi@ah.jp.nec.com, drepper@gmail.com, rientjes@google.com References: <1525240686-13335-1-git-send-email-prakash.sangappa@oracle.com> From: Prakash Sangappa Message-ID: <98e34010-d55a-5f2d-7d98-cba424de2e74@oracle.com> Date: Fri, 4 May 2018 09:27:04 -0700 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=8883 signatures=668698 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=3 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1711220000 definitions=main-1805040151 Sender: linux-api-owner@vger.kernel.org X-Mailing-List: linux-api@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: On 5/4/18 7:57 AM, Christopher Lameter wrote: > On Thu, 3 May 2018, prakash.sangappa wrote: > >>>> exact numa node from where the pages have been allocated. >>> Cant you write a small script that scans the information in numa_maps and >>> then displays the total pages per NUMA node and then a list of which >>> ranges have how many pages on a particular node? >> Don't think we can determine which numa node a given user process >> address range has pages from, based on the existing 'numa_maps' file. > Well the information is contained in numa_maps I thought. What is missing? Currently 'numa_maps' gives a list of numa nodes, memory is allocated per VMA. Ex. we get something like from numa_maps. 04000  N0=1,N2=2 kernelpagesize_KB=4 First is the start address of a VMA. This VMA could be much larger then 3 4k pages. It does not say which address in the VMA has the pages mapped. > >>>> reading this file will not be restricted(i.e requiring CAP_SYS_ADMIN). >>> So a prime motivator here is security restricted access to numa_maps? >> No it is the opposite. A regular user should be able to determine >> numa node information. > That used to be the case until changes were made to the permissions for > reading numa_maps. >