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Tue, 8 May 2018 08:53:23 -0400 Received: from resqmta-ch2-03v.sys.comcast.net ([69.252.207.35]:52602 "EHLO resqmta-ch2-03v.sys.comcast.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754527AbeEHMxX (ORCPT ); Tue, 8 May 2018 08:53:23 -0400 Date: Tue, 8 May 2018 07:53:21 -0500 (CDT) From: Christopher Lameter X-X-Sender: cl@nuc-kabylake To: "prakash.sangappa" 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 Subject: Re: [RFC PATCH] Add /proc//numa_vamaps for numa node information In-Reply-To: Message-ID: References: <1525240686-13335-1-git-send-email-prakash.sangappa@oracle.com> <98e34010-d55a-5f2d-7d98-cba424de2e74@oracle.com> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-CMAE-Envelope: MS4wfHlL3cipq14VGidN1P14PlKyIBTc5QfGV+bfHQih1k497KIxv/S4T71+Cdv0htEpSPlq7y4TtptQYmpkECD/Ok/WLfGNDk3ivXXNj9D8qBVnHzWvOqYb 8h2pJy7MdMybo23Euv6ghmD4J31ju5561LJKDLHIQSRm8Czcp8ZAdowih2e4YAmtsYQ93YZsOrdkf8ZhEuO1kHA9YUs/hqpbWqYDAFRPG2pxS0ap6MFw7v4t e7KAw8RE4nuE0Sx/2/CA+AxLy8yX/WcSx/JZEIrKxdHXjxoO030btA+N++LrbNqucsU3oIxZaOsoGy6ctN4gPFp1RPL2EeN0gICYtPPhgT4ip9qYL29dvyl1 wWEBOccvExk1PWlxjCG9vMje9p2SwhbW/Wq3c0Rjdv0yCapDwzHIPsLznKqpKgehT1oQ7TWdumz8NQo2St66zZQ2lLntV6YkocJ/h3dyl6Ovb6xtKyU3DjIW vMPW444pOBUs5od4 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 Mon, 7 May 2018, prakash.sangappa wrote: > > each address for each page? Length of the VMA segment? > > Physical address? > > Need numa node information for each virtual address with pages mapped. > No need of physical address. You need per page information? Note that there can only be one page per virtual address. Or are we talking about address ranges? https://www.kernel.org/doc/Documentation/vm/pagemap.txt ? Also the move_pages syscall has the ability to determine the location of individual pages.