From owner-freebsd-stable@FreeBSD.ORG Thu Dec 15 09:14:00 2011 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 192FC106566B for ; Thu, 15 Dec 2011 09:14:00 +0000 (UTC) (envelope-from m.seaman@infracaninophile.co.uk) Received: from smtp.infracaninophile.co.uk (smtp6.infracaninophile.co.uk [IPv6:2001:8b0:151:1:3cd3:cd67:fafa:3d78]) by mx1.freebsd.org (Postfix) with ESMTP id 9B6468FC12 for ; Thu, 15 Dec 2011 09:13:59 +0000 (UTC) Received: from seedling.black-earth.co.uk (seedling.black-earth.co.uk [IPv6:2001:8b0:151:1:fa1e:dfff:feda:c0bb]) (authenticated bits=0) by smtp.infracaninophile.co.uk (8.14.5/8.14.5) with ESMTP id pBF9DoK6015967 (version=TLSv1/SSLv3 cipher=DHE-RSA-CAMELLIA256-SHA bits=256 verify=NO) for ; Thu, 15 Dec 2011 09:13:55 GMT (envelope-from m.seaman@infracaninophile.co.uk) X-DKIM: OpenDKIM Filter v2.4.1 smtp.infracaninophile.co.uk pBF9DoK6015967 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=infracaninophile.co.uk; s=201001-infracaninophile; t=1323940435; bh=sxnGtHdnZClxO7kCkepOgP63ibzzPNRTLg5rebd63bE=; h=Message-ID:Date:From:MIME-Version:To:Subject:References: In-Reply-To:Content-Type:Cc; b=nWA0zML3WmhU8c5eKvaaP3sAzBkxu9ndRwV2JZ/JjcG4XG1w470kCZXGvl1crAMqA Rnp8oaP2iIe7jTp7jdTLKNiNNTtm/SOWtMyW3KEkMxS+Z44Pnu70lVZaXzUgYdNDIm nk/+T+lvbWsF1GzFQEfs7JW5SHNfp/eTPsw7Czvw= Message-ID: <4EE9BA47.7080005@infracaninophile.co.uk> Date: Thu, 15 Dec 2011 09:13:43 +0000 From: Matthew Seaman User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:8.0) Gecko/20111105 Thunderbird/8.0 MIME-Version: 1.0 To: freebsd-stable@freebsd.org References: <4EE1EAFE.3070408@m5p.com> <4EE2AE64.9060802@m5p.com> <4EE88343.2050302@m5p.com> <4EE933C6.4020209@zedat.fu-berlin.de> <20111215004205.GA11556@icarus.home.lan> In-Reply-To: <20111215004205.GA11556@icarus.home.lan> X-Enigmail-Version: 1.3.4 OpenPGP: id=60AE908C Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enigED13262F1122E774546949F3" X-Virus-Scanned: clamav-milter 0.97.3 at lucid-nonsense.infracaninophile.co.uk X-Virus-Status: Clean X-Spam-Status: No, score=-3.0 required=5.0 tests=ALL_TRUSTED,BAYES_00, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU autolearn=ham version=3.3.2 X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on lucid-nonsense.infracaninophile.co.uk Subject: Re: SCHED_ULE should not be the default X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 15 Dec 2011 09:14:00 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigED13262F1122E774546949F3 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On 15/12/2011 00:42, Jeremy Chadwick wrote: > It is already easy to switch schedulers. You change the option in your= > kernel config, rebuild kernel (world isn't necessary as long as you > haven't csup'd between your last rebuild and now), make installkernel, > shutdown -r now, done. >=20 > If what you're proposing is to make the scheduler changeable in > real-time? I think that would require a **lot** of work for something > that very few people would benefit from (please stop for a moment and > think about the majority of the userbase, not just niche environments; = I > say this politely, not with any condescension BTW). Sure, it'd be > "nice to have", but should be extremely low on the priority list (IMO).= Somewhere in between might be a good idea it seems to me: viz, change a setting in loader.conf and reboot to switch to a new scheduler. Having to juggle different kernels is no big deal for the likes of you and me, but it is quite a barrier in many environments. Cheers, Matthew --=20 Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard Flat 3 PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate JID: matthew@infracaninophile.co.uk Kent, CT11 9PW --------------enigED13262F1122E774546949F3 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.16 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk7puk0ACgkQ8Mjk52CukIzNsACffjb/WRQ7+Oh1BhjBSlLC+0K9 uDgAnivS0QRfbkjrqQ4tC9K38uzv5gZj =fqQM -----END PGP SIGNATURE----- --------------enigED13262F1122E774546949F3--