From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx178.postini.com [74.125.245.178]) by kanga.kvack.org (Postfix) with SMTP id 835D06B0044 for ; Mon, 26 Mar 2012 18:35:59 -0400 (EDT) Message-ID: <1332788223.16159.185.camel@twins> Subject: Re: [PATCH 39/39] autonuma: NUMA scheduler SMT awareness From: Peter Zijlstra Date: Mon, 26 Mar 2012 20:57:03 +0200 In-Reply-To: <1332783986-24195-40-git-send-email-aarcange@redhat.com> References: <1332783986-24195-1-git-send-email-aarcange@redhat.com> <1332783986-24195-40-git-send-email-aarcange@redhat.com> Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 Sender: owner-linux-mm@kvack.org List-ID: To: Andrea Arcangeli Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Hillf Danton , Dan Smith , Linus Torvalds , Andrew Morton , Thomas Gleixner , Ingo Molnar , Paul Turner , Suresh Siddha , Mike Galbraith , "Paul E. McKenney" , Lai Jiangshan , Bharata B Rao , Lee Schermerhorn , Rik van Riel , Johannes Weiner On Mon, 2012-03-26 at 19:46 +0200, Andrea Arcangeli wrote: > Add SMT awareness to the NUMA scheduler so that it will not move load > from fully idle SMT threads, to semi idle SMT threads. This shows a complete fail in design, you're working around the regular scheduler/load-balancer instead of with it and hence are duplicating all kinds of stuff. I'll not have that.. Nacked-by: Peter Zijlstra -- 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 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932221Ab2CZWga (ORCPT ); Mon, 26 Mar 2012 18:36:30 -0400 Received: from merlin.infradead.org ([205.233.59.134]:48310 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932158Ab2CZWgK convert rfc822-to-8bit (ORCPT ); Mon, 26 Mar 2012 18:36:10 -0400 Message-ID: <1332788223.16159.185.camel@twins> Subject: Re: [PATCH 39/39] autonuma: NUMA scheduler SMT awareness From: Peter Zijlstra To: Andrea Arcangeli Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Hillf Danton , Dan Smith , Linus Torvalds , Andrew Morton , Thomas Gleixner , Ingo Molnar , Paul Turner , Suresh Siddha , Mike Galbraith , "Paul E. McKenney" , Lai Jiangshan , Bharata B Rao , Lee Schermerhorn , Rik van Riel , Johannes Weiner Date: Mon, 26 Mar 2012 20:57:03 +0200 In-Reply-To: <1332783986-24195-40-git-send-email-aarcange@redhat.com> References: <1332783986-24195-1-git-send-email-aarcange@redhat.com> <1332783986-24195-40-git-send-email-aarcange@redhat.com> Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT X-Mailer: Evolution 3.2.2- Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2012-03-26 at 19:46 +0200, Andrea Arcangeli wrote: > Add SMT awareness to the NUMA scheduler so that it will not move load > from fully idle SMT threads, to semi idle SMT threads. This shows a complete fail in design, you're working around the regular scheduler/load-balancer instead of with it and hence are duplicating all kinds of stuff. I'll not have that.. Nacked-by: Peter Zijlstra