From owner-freebsd-amd64@FreeBSD.ORG Sun Jan 23 01:55:14 2005 Return-Path: Delivered-To: freebsd-amd64@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 216E016A4D0 for ; Sun, 23 Jan 2005 01:55:14 +0000 (GMT) Received: from pooker.samsco.org (pooker.samsco.org [168.103.85.57]) by mx1.FreeBSD.org (Postfix) with ESMTP id 9E2D643D3F for ; Sun, 23 Jan 2005 01:55:12 +0000 (GMT) (envelope-from scottl@freebsd.org) Received: from [192.168.254.12] (g4.samsco.home [192.168.254.12]) (authenticated bits=0) by pooker.samsco.org (8.12.11/8.12.10) with ESMTP id j0N1xTRN046672; Sat, 22 Jan 2005 18:59:30 -0700 (MST) (envelope-from scottl@freebsd.org) Message-ID: <41F303E7.8000003@freebsd.org> Date: Sat, 22 Jan 2005 18:54:47 -0700 From: Scott Long User-Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.7) Gecko/20040514 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Sven Willenberger References: <41F1903D.3060508@celeritystorm.com> <20050121235550.GA85260@troutmask.apl.washington.edu> <41F199B3.1030809@freebsd.org> <41F3022C.7070603@dmv.com> In-Reply-To: <41F3022C.7070603@dmv.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, hits=0.0 required=3.8 tests=none autolearn=no version=2.63 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on pooker.samsco.org cc: freebsd-amd64@freebsd.org Subject: Re: Would this system work correctly with FreeBSD 5.3 ? X-BeenThere: freebsd-amd64@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Porting FreeBSD to the AMD64 platform List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 23 Jan 2005 01:55:14 -0000 Sven Willenberger wrote: > > > Scott Long wrote: > >> >> 4GB+ is a problem on 5.3-RELEASE due to DMA issues. Only a small >> handful of storage drivers will actually work. >> > > We are looking to implement a postgresql solution using dual opteron/8G > RAM and LSI battery-backed scsi card (LSI MegaRAID 320-2X - 53C1030 > controller) RAID array. Are there any issues with this type of > configuration?? Looking at the hardware Release notes I do not see any > mention of this memory issue or what storage drivers are or are not > affected. The problem is not in the release notes because we didn't discover it until shortly after the release. The amr driver in 5.3-RELEASE has particularly bad problems with 4GB+. I've fixed it in both 5-STABLE and 6-CURRENT and it should be fairly reliable. There is a rare condition that causes problems under extreme load, but I think I fixed this as a side effect of other changes in 6-CURRENT. I'm currently testing and validating these changes for 5-STABLE. Scott