From owner-freebsd-current@FreeBSD.ORG Tue Sep 7 21:14:58 2004 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 6979216A4CE for ; Tue, 7 Sep 2004 21:14:58 +0000 (GMT) Received: from tomts25-srv.bellnexxia.net (tomts25-srv.bellnexxia.net [209.226.175.188]) by mx1.FreeBSD.org (Postfix) with ESMTP id AF05F43D5D for ; Tue, 7 Sep 2004 21:14:57 +0000 (GMT) (envelope-from dashevil@sympatico.ca) Received: from [192.168.2.32] ([65.93.56.19]) by tomts25-srv.bellnexxia.net ESMTP <20040907211454.FKFN7925.tomts25-srv.bellnexxia.net@[192.168.2.32]>; Tue, 7 Sep 2004 17:14:54 -0400 From: Chris Laverdure To: Scott Long In-Reply-To: <413E20FC.80801@samsco.org> References: <413E20FC.80801@samsco.org> Content-Type: text/plain Message-Id: <1094577291.56128.1.camel@elemental.DashEvil> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.6 Date: Tue, 07 Sep 2004 17:14:52 +0000 Content-Transfer-Encoding: 7bit cc: freebsd-current@freebsd.org Subject: Re: HEADS UP: Scheduler change X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 07 Sep 2004 21:14:58 -0000 On Tue, 2004-09-07 at 20:58, Scott Long wrote: > All, > > In the interest of getting RELENG_5 stable and ready for 5.3, we are > going to switch the scheduler in 6-CURRENT from SCHED_ULE to SCHED_4BSD. > Tests are showing that the 4BSD is a bit more stable under load than > ULE, and is a LOT morestable than ULE with PREEMPTION enabled. This > does not mean that ULE is being removed or that we have lost confidence > in the direction and features of ULE. By changing this we can focus on > stability for the rest of the RELENG_5 cycle. I'd encourage anyone who > is interested in the ULE scheduler to talk to Julian Elischer and Jeff > Roberson about what needs to be done with it. Once 5.3 is released we > can look at switching 6-CURRENT back to ULE if it makes sense. > > Scott Wouldn't it make sense to have them list what needs to be done with it somewhere?