From owner-cvs-src@FreeBSD.ORG Fri Mar 4 23:16:28 2005 Return-Path: Delivered-To: cvs-src@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5799216A4CE; Fri, 4 Mar 2005 23:16:28 +0000 (GMT) Received: from mail14.syd.optusnet.com.au (mail14.syd.optusnet.com.au [211.29.132.195]) by mx1.FreeBSD.org (Postfix) with ESMTP id AB85B43D31; Fri, 4 Mar 2005 23:16:27 +0000 (GMT) (envelope-from PeterJeremy@optushome.com.au) Received: from cirb503493.alcatel.com.au (c211-30-75-229.belrs2.nsw.optusnet.com.au [211.30.75.229]) j24NGKYE025825 (version=TLSv1/SSLv3 cipher=EDH-RSA-DES-CBC3-SHA bits=168 verify=NO); Sat, 5 Mar 2005 10:16:21 +1100 Received: from cirb503493.alcatel.com.au (localhost.alcatel.com.au [127.0.0.1])j24NGK7l008345; Sat, 5 Mar 2005 10:16:20 +1100 (EST) (envelope-from pjeremy@cirb503493.alcatel.com.au) Received: (from pjeremy@localhost)j24NGKUO008344; Sat, 5 Mar 2005 10:16:20 +1100 (EST) (envelope-from pjeremy) Date: Sat, 5 Mar 2005 10:16:20 +1100 From: Peter Jeremy To: Julian Elischer , src-committers@FreeBSD.ORG, cvs-src@FreeBSD.ORG, cvs-all@FreeBSD.ORG Message-ID: <20050304231620.GA4394@cirb503493.alcatel.com.au> References: <200503020915.28512.jhb@FreeBSD.org> <4226446B.7020406@freebsd.org> <61ac46c154aa515a692308440dd1141d@FreeBSD.org> <422710DD.1070203@freebsd.org> <422719E0.10703@samsco.org> <42279B6D.1000005@freebsd.org> <20050304182629.GA39457@VARK.MIT.EDU> <4228AB27.3020204@samsco.org> <4228B504.7000302@elischer.org> <20050304212329.GA40395@VARK.MIT.EDU> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20050304212329.GA40395@VARK.MIT.EDU> User-Agent: Mutt/1.4.2i Subject: Re: cvs commit: src/sys/kern kern_sig.c X-BeenThere: cvs-src@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: CVS commit messages for the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 04 Mar 2005 23:16:28 -0000 On Fri, 2005-Mar-04 16:23:29 -0500, David Schultz wrote: >On Fri, Mar 04, 2005, Julian Elischer wrote: >> for a start I'd like to add a sysctl to turn off swapping out kernel >> stacks.. >> then if someone had a reproducible or atleast 'common" problem, >> we could suggest turning it off to see >> if it fixes the problem.. that would be a big smoking gun.. > >You mean like vm.swap_enabled? ;-) That turns off all swapping and isn't going to answer the question. Julian's point does seem reasonable - there is a potential problem relating to swapping kernel threads but there's no clear evidence that it is or isn't a real problem. Adding a knob to easily control the behaviour would be useful - we stand to get some real data and can then better make a decision as to how to proceed. -- Peter Jeremy