From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx179.postini.com [74.125.245.179]) by kanga.kvack.org (Postfix) with SMTP id 9D7AF6B004D for ; Mon, 12 Nov 2012 17:59:56 -0500 (EST) Received: from mail93-co9 (localhost [127.0.0.1]) by mail93-co9-R.bigfish.com (Postfix) with ESMTP id AC282660170 for ; Mon, 12 Nov 2012 22:58:18 +0000 (UTC) From: KY Srinivasan Subject: RE: [PATCH 1/1] mm: Export a function to read vm_committed_as Date: Mon, 12 Nov 2012 22:58:11 +0000 Message-ID: <426367E2313C2449837CD2DE46E7EAF930E39FBC@SN2PRD0310MB382.namprd03.prod.outlook.com> References: <1352600728-17766-1-git-send-email-kys@microsoft.com> <426367E2313C2449837CD2DE46E7EAF930E35B45@SN2PRD0310MB382.namprd03.prod.outlook.com> In-Reply-To: Content-Language: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Sender: owner-linux-mm@kvack.org List-ID: To: David Rientjes Cc: "gregkh@linuxfoundation.org" , "linux-kernel@vger.kernel.org" , "devel@linuxdriverproject.org" , "olaf@aepfle.de" , "apw@canonical.com" , "andi@firstfloor.org" , "akpm@linux-foundation.org" , "linux-mm@kvack.org" , "kamezawa.hiroyuki@gmail.com" , "mhocko@suse.cz" , "hannes@cmpxchg.org" , "yinghan@google.com" , "dan.magenheimer@oracle.com" > -----Original Message----- > From: David Rientjes [mailto:rientjes@google.com] > Sent: Monday, November 12, 2012 4:54 PM > To: KY Srinivasan > Cc: gregkh@linuxfoundation.org; linux-kernel@vger.kernel.org; > devel@linuxdriverproject.org; olaf@aepfle.de; apw@canonical.com; > andi@firstfloor.org; akpm@linux-foundation.org; linux-mm@kvack.org; > kamezawa.hiroyuki@gmail.com; mhocko@suse.cz; hannes@cmpxchg.org; > yinghan@google.com > Subject: RE: [PATCH 1/1] mm: Export a function to read vm_committed_as >=20 > On Sun, 11 Nov 2012, KY Srinivasan wrote: >=20 > > Thanks for the prompt response. For the Linux balloon driver for Hyper-= V, I > need access > > to the metric that reflects the system wide memory commitment made by t= he > guest kernel. > > In the Hyper-V case, this information is one of the many metrics used t= o drive > the policy engine > > on the host. Granted, the interface name I have chosen here could be mo= re > generic; how about > > read_mem_commit_info(void). I am open to suggestions here. > > >=20 > I would suggest vm_memory_committed() and there shouldn't be a comment > describing that this is just a wrapper for modules to read > vm_committed_as, that's apparent from the implementation: it should be > describing exactly what this value represents and why it is a useful > metric (at least in the case that you're concerned about). Will do; thanks. >=20 > > With regards to making changes to the Xen self ballooning code, I would= like to > separate that patch > > from the patch that implements the exported mechanism to access the > memory commitment information. >=20 > Why? Is xen using it for a different inference? I think it is good to separate these patches. Dan (copied here) wrote the c= ode for the Xen self balloon driver. If it is ok with him I can submit the patch for Xe= n as well.=20 Regards, K. Y >=20 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org