From owner-freebsd-current@FreeBSD.ORG Mon Nov 28 14:12:53 2005 Return-Path: X-Original-To: freebsd-current@freebsd.org 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 A781416A41F; Mon, 28 Nov 2005 14:12:53 +0000 (GMT) (envelope-from bra@fsn.hu) Received: from people.fsn.hu (people.fsn.hu [195.228.252.137]) by mx1.FreeBSD.org (Postfix) with ESMTP id 2BE9F43D68; Mon, 28 Nov 2005 14:12:50 +0000 (GMT) (envelope-from bra@fsn.hu) Received: from localhost (localhost [127.0.0.1]) by people.fsn.hu (Postfix) with ESMTP id 635128444F; Mon, 28 Nov 2005 10:15:11 +0100 (CET) Received: from people.fsn.hu ([127.0.0.1]) by localhost (people.fsn.hu [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 76914-04-5; Mon, 28 Nov 2005 10:15:05 +0100 (CET) Received: from [172.16.151.70] (fw.axelero.hu [195.228.243.120]) by people.fsn.hu (Postfix) with ESMTP id D6EAC8444C; Mon, 28 Nov 2005 10:15:04 +0100 (CET) Message-ID: <438ACA94.6090606@fsn.hu> Date: Mon, 28 Nov 2005 10:15:00 +0100 From: Attila Nagy User-Agent: Debian Thunderbird 1.0.2 (X11/20050602) X-Accept-Language: en-us, en MIME-Version: 1.0 To: freebsd-current@freebsd.org Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Virus-Scanned: amavisd-new at fsn.hu Cc: Scott Long , =?UTF-8?B?U8O4cmVuIFNjaG1pZHQ=?= Subject: DMA failures on AMD64 with 4 GB RAM X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 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: Mon, 28 Nov 2005 14:12:53 -0000 Hello, There is a problem with recent ATA drivers on (at least) AMD64 with 4 GB of RAM, which can be triggered by synchronizing a geom mirror provider to another one (or generally a bigger disk I/O, I guess). The machine dies instantly with the following: GEOM_MIRROR: Device hars: rebuilding provider ad6. ad6: setting up DMA failed ad6: setting up DMA failed This is true either on RELENG_6 and on HEAD as of today. There are two workarounds: - use the ata driver from RELENG_6 which is not older than 2005.10.08 - set hw.physmem smaller than 4G Are there any chances to resolve this issue? Thank you. ps: there was some discussion about this: http://marc.theaimsgroup.com/?l=freebsd-amd64&m=113034973432742&w=2 where Søren said it might be busdma, not the ata driver and Scott promised to look into that. -- Attila Nagy e-mail: Attila.Nagy@fsn.hu Free Software Network (FSN.HU) phone: +3630 306 6758 ISOs: http://www.fsn.hu/?f=download