From owner-freebsd-current@FreeBSD.ORG Fri Jan 30 22:12:20 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 0F0E916A4CE for ; Fri, 30 Jan 2004 22:12:20 -0800 (PST) Received: from alpha.siliconlandmark.com (alpha.siliconlandmark.com [209.69.98.4]) by mx1.FreeBSD.org (Postfix) with ESMTP id 7E16B43D2F for ; Fri, 30 Jan 2004 22:12:18 -0800 (PST) (envelope-from andy@siliconlandmark.com) Received: from alpha.siliconlandmark.com (localhost [127.0.0.1]) i0V6CHZV028528; Sat, 31 Jan 2004 01:12:17 -0500 (EST) (envelope-from andy@siliconlandmark.com) Received: from localhost (andy@localhost)i0V6CGwV028525; Sat, 31 Jan 2004 01:12:16 -0500 (EST) (envelope-from andy@siliconlandmark.com) X-Authentication-Warning: alpha.siliconlandmark.com: andy owned process doing -bs Date: Sat, 31 Jan 2004 01:12:16 -0500 (EST) From: Andre Guibert de Bruet To: Magnus Dahlstedt In-Reply-To: <20040130124818.T2246@gandalf.midgard.liu.se> Message-ID: <20040131003843.I10185@alpha.siliconlandmark.com> References: <20040130124818.T2246@gandalf.midgard.liu.se> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-MailScanner-Information: Please contact the ISP for more information X-MailScanner: Found to be clean cc: current@freebsd.org Subject: Re: 5.2-RELEASE crash 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: Sat, 31 Jan 2004 06:12:20 -0000 On Fri, 30 Jan 2004, Magnus Dahlstedt wrote: > panic: kmem_malloc(16384): kmem_map too small: 275243008 total allocated > cpuid = 1; > Debugger("panic") > Stopped at Debugger+0x4f: xchgl %ebx,in_Debugger.0 > db> trace > Debugger(c06c2ccd,1,c06d5a05,e40a6a74,100) at Debugger+0x4f > panic(c06d5a05,4000,1067e000,e40a6aa0,c0518254) at panic+0x14a > kmem_malloc(c10310a0,4000,402,e40a6aec,c064c19e) at kmem_malloc+0x101 -- 8< -- snip -- 8< -- > real memory = 2146942976 (2047 MB) > avail memory = 2080309248 (1983 MB) You are using a large amount of RAM and using the default kmem_map sizing options. What you want to do to fix this is manually increase the KVA_PAGES tunable to something like 640 (By putting "options KVA_PAGES=640" in your kernel config file). You will also want to grow your kmem_map by changing the following: options VM_KMEM_SIZE_MAX=(512*1048576) options VM_KMEM_SIZE_SCALE=2 On a busy system with 3.5GB, I found that using 768MB for VM_KMEM_SIZE_MAX helps it run flawlessly. These values are not set in stone, and should only be used as a guide. In other words, do your own testing! :-) There are a number of really interesting posts that have been made on this issue, the most notable ones being from David Schultz and Terry Lambert. You can find them online at http://unix.derkeiler.com/Mailing-Lists/FreeBSD/current/2003-06/1599.html Regards, > Andre Guibert de Bruet | Enterprise Software Consultant > > Silicon Landmark, LLC. | http://siliconlandmark.com/ >