This is a multi-part message in MIME format. --------------0595D826F6CCA58F63EA40CF Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit --------------0595D826F6CCA58F63EA40CF Content-Type: message/rfc822 Content-Transfer-Encoding: 7bit Content-Disposition: inline Return-Path: <sun-managers-relayat_private> Received: from webster.timeplex.com ([134.196.250.50]) by wclmail.timeplex.com (Netscape Messaging Server 3.5) with ESMTP id AAA6F3E; Fri, 6 Nov 1998 17:36:28 -0500 Received: from sunmanagers.ececs.uc.edu ([129.137.188.152]) by webster.timeplex.com (Netscape Messaging Server 3.5) with ESMTP id AAA3C2E; Fri, 6 Nov 1998 17:22:29 -0500 Received: from localhost (daemon@localhost) by sunmanagers.ececs.uc.edu (8.8.8/8.8.8) with SMTP id OAA08179; Fri, 6 Nov 1998 14:43:41 -0500 (EST) Received: by sunmanagers.ececs.uc.edu (bulk_mailer v1.9); Fri, 6 Nov 1998 14:39:11 -0500 Received: (from majdomo@localhost) by sunmanagers.ececs.uc.edu (8.8.8/8.8.8) id OAA08149 for sun-managers-list; Fri, 6 Nov 1998 14:39:10 -0500 (EST) Received: from ncgr.ncgr.org (ncgr.ncgr.org [198.59.177.2]) by sunmanagers.ececs.uc.edu (8.8.8/8.8.8) with ESMTP id OAA08145 for <sun-managersat_private>; Fri, 6 Nov 1998 14:39:02 -0500 (EST) Received: from thog (thog [198.59.177.9]) by ncgr.ncgr.org (8.9.0/8.9.0) with SMTP id MAA29513 for <sun-managersat_private>; Fri, 6 Nov 1998 12:37:15 -0700 (MST) Message-Id: <199811061937.MAA29513at_private> Date: Fri, 6 Nov 1998 12:38:44 -0700 (MST) From: "Peter L. Wargo" <plwat_private> Reply-To: "Peter L. Wargo" <plwat_private> Subject: NOTE: Solaris 7 gotcha for some ultras To: sun-managersat_private MIME-Version: 1.0 Content-Type: TEXT/plain; charset=us-ascii Content-MD5: dLH5aJcxQYmWBV2y4S0/BQ== X-Mailer: dtmail 1.3.0 CDE Version 1.3 SunOS 5.7 sun4u sparc Sender: owner-sun-managersat_private Got a surprise when I finally installed the non-beta version of Solaris 7 on my Ultra-2 today. It booted to 32-bit mode instead of 64-bit, claiming my hardware defaulted to 32-bit mode. The message at boot time said to see the boot(1m) man page, so I looked, and there it was at the bottom: On systems containing 200MHz or lower UltraSPARC-1 proces- sors, it is possible for a user to run a 64-bit program designed to exploit a problem that could cause a processor to stall. Since 64-bit progams cannot run on the 32-bit kernel, the 32-bit kernel is chosen as the default file on these systems. The code sequence that exploits the problem is very unusual and is not likely to be generated by a compiler. Assembler code had to be specifically written to demonstrate the prob- lem. It is highly unlikely that a legitimate handwritten assembler routine would use this code sequence. Users willing to assume the risk that a user might acciden- tally or deliberately run a program that was designed to cause a processor to stall may choose to run the 64-bit ker- nel by modifying the boot policy file. Edit /platform/platform-name/boot.conf so that it contains an uncommented line with the variable named ALLOW_64BIT_KERNEL_ON_UltraSPARC_1_CPU set to the value true as shown in the example that follows: ALLOW_64BIT_KERNEL_ON_UltraSPARC_1_CPU=true For more information, see the Sun Hardware Platform Guide. I changed it, and it works. Hmmm... ----------------------------------------------------------- Peter L. Wargo / plwat_private / +1 505 995 4476 (FAX: 4475) Group Leader, Systems Administration The National Center for Genome Resources 1800-A Old Pecos Trail, Santa Fe, NM 87505 (USA) http://www.ncgr.org --------------0595D826F6CCA58F63EA40CF Content-Type: text/x-vcard; charset=us-ascii; name="Zwieback_Dave.vcf" Content-Transfer-Encoding: 7bit Content-Description: Card for Dave D. Zwieback Content-Disposition: attachment; filename="Zwieback_Dave.vcf" begin:vcard n:Zwieback;Dave x-mozilla-html:TRUE org:TimePlex Group adr:;;;Woodcliff Lake;NJ;07675;USA version:2.1 email;internet:Zwieback_Daveat_private title:NetSys Manager tel;fax:201-391-0308 tel;work:391-4126 x-mozilla-cpt:;0 fn:Dave Zwieback end:vcard --------------0595D826F6CCA58F63EA40CF--
This archive was generated by hypermail 2b30 : Fri Apr 13 2001 - 14:22:23 PDT