Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757576AbaGAIUl (ORCPT ); Tue, 1 Jul 2014 04:20:41 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:53753 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754762AbaGAIUj (ORCPT ); Tue, 1 Jul 2014 04:20:39 -0400 Date: Tue, 1 Jul 2014 10:20:20 +0200 From: Peter Zijlstra To: Michael wang Cc: Mike Galbraith , Rik van Riel , Ingo Molnar , Alex Shi , Paul Turner , Mel Gorman , Daniel Lezcano , LKML Subject: Re: [PATCH] sched: select 'idle' cfs_rq per task-group to prevent tg-internal imbalance Message-ID: <20140701082020.GL6758@twins.programming.kicks-ass.net> References: <53A11A89.5000602@linux.vnet.ibm.com> <20140623094251.GS19860@laptop.programming.kicks-ass.net> <53A8F1DE.2060908@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="afaOoWBOIwPZGAW2" Content-Disposition: inline In-Reply-To: <53A8F1DE.2060908@linux.vnet.ibm.com> User-Agent: Mutt/1.5.21 (2012-12-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --afaOoWBOIwPZGAW2 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Jun 24, 2014 at 11:34:54AM +0800, Michael wang wrote: > On 06/23/2014 05:42 PM, Peter Zijlstra wrote: > [snip] > >> +} > >=20 > > Still completely hate this, it doesn't make sense conceptual sense what > > so ever. >=20 > Yeah... and now I agree your opinion that this could not address all the > cases after all the testing these days... >=20 > Just wondering could we make this another scheduler feature? No; sched_feat() is for debugging, BIG CLUE: its guarded by CONFIG_SCHED_DEBUG, anybody using it in production or anywhere else is broken. If people are using it, I should remove or at least randomize the interface. --afaOoWBOIwPZGAW2 Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQIcBAEBAgAGBQJTsm88AAoJEHZH4aRLwOS6v1UP/RIwNax+7sBxk5ksNCiuKdDb znNgTbnIGZpsUixxy0mk6NDLdM4NJM8K4Mf0ey8J+IYR9TjXO1cJK65M1qB837F/ 2I1bwBU56khhbNlGioMctKO6uUIJO8FpUgbLctfQmSY2Ts1eWAlIlRi/Tmtf1Z2n PeaC8DmnrqtIwFOQtk4rWpvcgqRgQxTOzq9CtpdqN/cAi20GSRfnHjp0bI4ZvwXp fRPXQX/N5UimaGS6hIvQ41quVlhJ/Rv2DGZw4oaio+tWLMx9V0fmjAfNJuVUf2hr Wald4Z6DYiRVGgZZWCia8/ySHqiXiLytOUNbWO+Dc/44g0LsLv9FDl/1WSYIzXQv haF3eqy8qSa9KzsN3xoQj/W7ZFmpAKynLWC+huWkHHuLYmvWMcZqZr4S3Oz4+dkK aP8vyFmQELk2GC9tLHH3gnWnRLPtilYM3RPqM4lxZMSEy8NgerkNPGE44v3a9gi4 +SMZYpZ9dxV3+W/yk+ir3g0pKFhl7mGUh3euCC6Vuvd6PQLCIXSeuPUiqAQrVdhV CaWV6r4tOSco1nGV/tKUCtBQe2SbGPnBk+OFN8xQXLCpcVPaADkgd/dwV7s1wdme FmbJjo4KXqOn8XSjzctWq0POqrx4mZynx0F67ZXlx54LPZIvlC5I4nSIB/HqLIMM kDagxRxaZUnXJyE/4BH1 =oegg -----END PGP SIGNATURE----- --afaOoWBOIwPZGAW2-- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/