From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail144.messagelabs.com (mail144.messagelabs.com [216.82.254.51]) by kanga.kvack.org (Postfix) with ESMTP id 50B226B0012 for ; Wed, 15 Jun 2011 12:53:33 -0400 (EDT) Received: from d23relay03.au.ibm.com (d23relay03.au.ibm.com [202.81.31.245]) by e23smtp04.au.ibm.com (8.14.4/8.13.1) with ESMTP id p5FGlNNC014277 for ; Thu, 16 Jun 2011 02:47:23 +1000 Received: from d23av04.au.ibm.com (d23av04.au.ibm.com [9.190.235.139]) by d23relay03.au.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id p5FGrTmW1073406 for ; Thu, 16 Jun 2011 02:53:29 +1000 Received: from d23av04.au.ibm.com (loopback [127.0.0.1]) by d23av04.au.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id p5FGrSIY016776 for ; Thu, 16 Jun 2011 02:53:28 +1000 Date: Wed, 15 Jun 2011 22:23:21 +0530 From: Ankita Garg Subject: Re: [PATCH 00/10] mm: Linux VM Infrastructure to support Memory Power Management Message-ID: <20110615165321.GC23151@in.ibm.com> Reply-To: Ankita Garg References: <20110610165529.GC2230@linux.vnet.ibm.com> <20110610170535.GC25774@srcf.ucam.org> <20110610171939.GE2230@linux.vnet.ibm.com> <20110610172307.GA27630@srcf.ucam.org> <20110610175248.GF2230@linux.vnet.ibm.com> <20110610180807.GB28500@srcf.ucam.org> <20110610184738.GG2230@linux.vnet.ibm.com> <20110610192329.GA30496@srcf.ucam.org> <20110610193713.GJ2230@linux.vnet.ibm.com> <20110610200233.5ddd5a31@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20110610200233.5ddd5a31@infradead.org> Sender: owner-linux-mm@kvack.org List-ID: To: Arjan van de Ven Cc: paulmck@linux.vnet.ibm.com, Matthew Garrett , Kyungmin Park , Andrew Morton , linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-pm@lists.linux-foundation.org, svaidy@linux.vnet.ibm.com, thomas.abraham@linaro.org Hi, On Fri, Jun 10, 2011 at 08:02:33PM -0700, Arjan van de Ven wrote: > On Fri, 10 Jun 2011 12:37:13 -0700 > "Paul E. McKenney" wrote: > > > On Fri, Jun 10, 2011 at 08:23:29PM +0100, Matthew Garrett wrote: > > > On Fri, Jun 10, 2011 at 11:47:38AM -0700, Paul E. McKenney wrote: > > > > > > > And if I understand you correctly, then the patches that Ankita > > > > posted should help your self-refresh case, along with the > > > > originally intended the power-down case and special-purpose use > > > > of memory case. > > > > > > Yeah, I'd hope so once we actually have capable hardware. > > > > Cool!!! > > > > So Ankita's patchset might be useful to you at some point, then. > > > > Does it look like a reasonable implementation? > > as someone who is working on hardware that is PASR capable right now, > I have to admit that our plan was to just hook into the buddy allocator, > and use PASR on the top level of buddy (eg PASR off blocks that are > free there, and PASR them back on once an allocation required the block > to be broken up)..... that looked the very most simple to me. > The maximum order in buddy allocator is by default 1k pages. Isn't this too small a granularity to track blocks that might comprise a PASR unit? > Maybe something much more elaborate is needed, but I didn't see why so > far. > > -- Regards, Ankita Garg (ankita@in.ibm.com) Linux Technology Center IBM India Systems & Technology Labs, Bangalore, India -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org