From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx149.postini.com [74.125.245.149]) by kanga.kvack.org (Postfix) with SMTP id 2A97D6B0062 for ; Thu, 1 Nov 2012 09:58:18 -0400 (EDT) Date: Thu, 1 Nov 2012 13:58:13 +0000 From: Mel Gorman Subject: Re: [PATCH 20/31] sched, numa, mm/mpol: Make mempolicy home-node aware Message-ID: <20121101135813.GX3888@suse.de> References: <20121025121617.617683848@chello.nl> <20121025124834.012980641@chello.nl> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline In-Reply-To: <20121025124834.012980641@chello.nl> Sender: owner-linux-mm@kvack.org List-ID: To: Peter Zijlstra Cc: Rik van Riel , Andrea Arcangeli , Johannes Weiner , Thomas Gleixner , Linus Torvalds , Andrew Morton , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Paul Turner , Lee Schermerhorn , Christoph Lameter , Ingo Molnar On Thu, Oct 25, 2012 at 02:16:37PM +0200, Peter Zijlstra wrote: > Add another layer of fallback policy to make the home node concept > useful from a memory allocation PoV. > > This changes the mpol order to: > > - vma->vm_ops->get_policy [if applicable] > - vma->vm_policy [if applicable] > - task->mempolicy > - tsk_home_node() preferred [NEW] > - default_policy > > Note that the tsk_home_node() policy has Migrate-on-Fault enabled to > facilitate efficient on-demand memory migration. > Makes sense and it looks like a VMA policy, if set, will still override the home_node policy as you'd expect. At some point this may need to cope with node hot-remove. Also, at some point this must be dealing with the case where mbind() is called but the home_node is not in the nodemask. Does that happen somewhere else in the series? (maybe I'll see it later) -- Mel Gorman SUSE Labs -- 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