From owner-freebsd-hackers@FreeBSD.ORG Thu Jan 17 15:57:06 2013 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id 47AE95AD for ; Thu, 17 Jan 2013 15:57:06 +0000 (UTC) (envelope-from Devin.Teske@fisglobal.com) Received: from mx1.fisglobal.com (mx1.fisglobal.com [199.200.24.190]) by mx1.freebsd.org (Postfix) with ESMTP id 161EB9ED for ; Thu, 17 Jan 2013 15:57:05 +0000 (UTC) Received: from smtp.fisglobal.com ([10.132.206.31]) by ltcfislmsgpa06.fnfis.com (8.14.5/8.14.5) with ESMTP id r0HFv4ci014440 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NOT); Thu, 17 Jan 2013 09:57:05 -0600 Received: from [10.0.0.102] (10.14.152.24) by smtp.fisglobal.com (10.132.206.31) with Microsoft SMTP Server (TLS) id 14.2.309.2; Thu, 17 Jan 2013 09:57:04 -0600 Subject: Re: disadvantages of running 8.3 kernel on freebsd 8.2 system MIME-Version: 1.0 (Apple Message framework v1283) Content-Type: text/plain; charset="windows-1252" From: Devin Teske In-Reply-To: Date: Thu, 17 Jan 2013 07:57:01 -0800 Content-Transfer-Encoding: quoted-printable Message-ID: <9A20C472-593A-4AAB-A0C0-FE6375011DAD@fisglobal.com> References: To: =?iso-8859-1?Q?Ali_Okan_Y=DCKSEL?= X-Mailer: Apple Mail (2.1283) X-Originating-IP: [10.14.152.24] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.9.8327, 1.0.431, 0.0.0000 definitions=2013-01-17_06:2013-01-17,2013-01-17,1970-01-01 signatures=0 Cc: freebsd-hackers@freebsd.org X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list Reply-To: Devin Teske List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 17 Jan 2013 15:57:06 -0000 On Jan 17, 2013, at 4:06 AM, Ali Okan Y=DCKSEL wrote: > I know for UPDATING, it s not correct way, but i tried and 8.2 system wor= ks > with 8.3 kernel (copied 8.3 /boot/kernel directory to freebsd 8.2 > /boot/kernel) and it s not good solution but i want to know; >=20 >=20 > - What are specific disadvantages that i can see clearly, running 8.3 > kernel on freebsd 8.2? A couple user land tools might barf on you (listed below). Other than that, it's generally considered very safe. The quintessential test-case is running an 8.2 jail under an 8.3 host. We do this all the time with various releases (again, most-problematic util= ities listed below). > - What are user land tools those not match with 8.3 kernel on freebsd > 8.2 system=85? >=20 top and ps might complain about procsize mismatch. netstat has been known to have problems if the gap is too wide. That's about all that I can think off the top of my head. The quick solution is to just grab the 8.3-R copies of top, ps, and netstat= *IFF* they cause problems (e.g., ps immediately dies with "procsize mismat= ch" error). --=20 Devin P.S. Been doing this kind of mismatching of kernel/userland for YEARS (all = the way back to 4.4/4.8) and top and ps always prove to be problematic. _____________ The information contained in this message is proprietary and/or confidentia= l. If you are not the intended recipient, please: (i) delete the message an= d all copies; (ii) do not disclose, distribute or use the message in any ma= nner; and (iii) notify the sender immediately. In addition, please be aware= that any message addressed to our domain is subject to archiving and revie= w by persons other than the intended recipient. Thank you.