From owner-freebsd-current@FreeBSD.ORG Thu Nov 24 00:34:46 2005 Return-Path: X-Original-To: current@FreeBSD.org Delivered-To: freebsd-current@FreeBSD.ORG Received: from [127.0.0.1] (localhost [127.0.0.1]) by hub.freebsd.org (Postfix) with ESMTP id 5811216A41F; Thu, 24 Nov 2005 00:34:46 +0000 (GMT) (envelope-from davidxu@freebsd.org) Message-ID: <43850AB7.4000109@freebsd.org> Date: Thu, 24 Nov 2005 08:35:03 +0800 From: David Xu User-Agent: Mozilla/5.0 (X11; U; FreeBSD amd64; en-US; rv:1.7.10) Gecko/20050806 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Kris Kennaway References: <20051123201837.GA4822@xor.obsecurity.org> <438500BE.3020507@freebsd.org> <20051124000824.GA11032@xor.obsecurity.org> In-Reply-To: <20051124000824.GA11032@xor.obsecurity.org> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Cc: current@FreeBSD.org Subject: Re: 4BSD process starvation during I/O X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 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: Thu, 24 Nov 2005 00:34:47 -0000 Kris Kennaway wrote: >On Thu, Nov 24, 2005 at 07:52:30AM +0800, David Xu wrote: > > >>Kris Kennaway wrote: >> >> >> >>>Perhaps this can be tweaked. >>> >>>Kris >>> >>>P.S. Please, no responses about how maybe someone could write a new >>>scheduler that doesn't have this property. >>> >>> >>> >>> >>> >>> >>Can you try it again with FULL_PREEMPTION is turned on ? >> >> > >Didn't really make a difference: > > > This might only can be fixed when msleep no longer explicitly fiddles thread priority, let scheduler fully control it.