From owner-freebsd-questions@FreeBSD.ORG Fri Jan 21 21:59:45 2005 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5027716A4DC for ; Fri, 21 Jan 2005 21:59:45 +0000 (GMT) Received: from mailgate2.zdv.Uni-Mainz.DE (mailgate2.zdv.Uni-Mainz.DE [134.93.178.130]) by mx1.FreeBSD.org (Postfix) with ESMTP id C93DE43D39 for ; Fri, 21 Jan 2005 21:59:44 +0000 (GMT) (envelope-from ohartman@uni-mainz.de) Received: from [134.93.180.218] (edda.Physik.Uni-Mainz.DE [134.93.180.218]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mailgate2.zdv.Uni-Mainz.DE (Postfix) with ESMTP id 5DEFA3000636 for ; Fri, 21 Jan 2005 22:59:43 +0100 (CET) Message-ID: <41F17B3E.5050104@uni-mainz.de> Date: Fri, 21 Jan 2005 22:59:26 +0100 From: "O. Hartmann" Organization: Institut =?ISO-8859-15?Q?f=FCr_Geophysik?= User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; de-AT; rv:1.7.5) Gecko/20050102 X-Accept-Language: de-de, en MIME-Version: 1.0 To: freebsd-questions@freebsd.org Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: by amavisd-new at uni-mainz.de Subject: options PREEMPTION: system failure issue? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 21 Jan 2005 21:59:45 -0000 Hello. I have a very simple question about the kernel options options PREEMPTION options MUTEX_WAKE_ALL Have they performance penalties, stability issues in FreeBSD 5.3 (especially SMP environment but also in UP environment)? PREEMPTION ist listet in "NOTES" as a debuggin option but discussed prior here as a performance boost. Thanks, Oliver