Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756298Ab0KMVIb (ORCPT ); Sat, 13 Nov 2010 16:08:31 -0500 Received: from ms01.sssup.it ([193.205.80.99]:58915 "EHLO sssup.it" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753675Ab0KMVIa (ORCPT ); Sat, 13 Nov 2010 16:08:30 -0500 Subject: Re: [RFC][PATCH 18/22] sched: add reclaiming logic to -deadline tasks From: Raistlin To: Peter Zijlstra Cc: Luca Abeni , Ingo Molnar , Thomas Gleixner , Steven Rostedt , Chris Friesen , oleg@redhat.com, Frederic Weisbecker , Darren Hart , Johan Eker , "p.faure" , linux-kernel , Claudio Scordino , michael trimarchi , Fabio Checconi , Tommaso Cucinotta , Juri Lelli , Nicola Manica , Dhaval Giani , Harald Gustafsson , paulmck In-Reply-To: <1289584295.2084.343.camel@laptop> References: <1288333128.8661.137.camel@Palantir> <1288334546.8661.161.camel@Palantir> <1289513573.2084.199.camel@laptop> <1289576177.6525.509.camel@Palantir> <1289577841.2084.302.camel@laptop> <4CDD7C65.9090400@unitn.it> <1289584295.2084.343.camel@laptop> Content-Type: multipart/signed; micalg="pgp-sha1"; protocol="application/pgp-signature"; boundary="=-hygah2aJiKh1Sa/afnts" Date: Sat, 13 Nov 2010 22:08:16 +0100 Message-ID: <1289682496.6491.550.camel@Palantir> Mime-Version: 1.0 X-Mailer: Evolution 2.28.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1851 Lines: 52 --=-hygah2aJiKh1Sa/afnts Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Fri, 2010-11-12 at 18:51 +0100, Peter Zijlstra wrote: > > BTW, sorry for the shameless plug, but even with the current=20 > > SCHED_DEADLINE you are not forced to dimension the runtime using the=20 > > WCET.=20 >=20 > Yes you are, it pushes the deadline back on overrun. The idea it to > maintain the deadline despite overrunning your budget (up to a point). >=20 BTW, although I share most of Luca's and Tommaso's viewpoints, triggering bandwidth enforcement at runtime+something instead than just at runtime doesn't look all that bad, and should fit nicely in what we have now, without much twisting. It's just another way to interpret the runtime, and it seems feasible (or at least plan-able as future feature! :-P) to me... Actually this was exactly what I was asking and what I wanted to know. :-) Thanks, Dario --=20 <> (Raistlin Majere) ---------------------------------------------------------------------- Dario Faggioli, ReTiS Lab, Scuola Superiore Sant'Anna, Pisa (Italy) http://blog.linux.it/raistlin / raistlin@ekiga.net / dario.faggioli@jabber.org --=-hygah2aJiKh1Sa/afnts Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iEYEABECAAYFAkze/jgACgkQk4XaBE3IOsTKAgCcDdngmjb282jmKbHxG8afoVu8 mxIAnREk98lXGp2iiL4XtPaJiP2xIYcv =MOx5 -----END PGP SIGNATURE----- --=-hygah2aJiKh1Sa/afnts-- -- 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/