From owner-freebsd-scsi Mon Jul 8 12:49: 7 2002 Delivered-To: freebsd-scsi@freebsd.org Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id A49EA37B41B for ; Mon, 8 Jul 2002 12:49:03 -0700 (PDT) Received: from panzer.kdm.org (panzer.kdm.org [216.160.178.169]) by mx1.FreeBSD.org (Postfix) with ESMTP id DF5BB43E4A for ; Mon, 8 Jul 2002 12:49:01 -0700 (PDT) (envelope-from ken@panzer.kdm.org) Received: from panzer.kdm.org (localhost [127.0.0.1]) by panzer.kdm.org (8.12.5/8.12.5) with ESMTP id g68JlhKi066683; Mon, 8 Jul 2002 13:47:43 -0600 (MDT) (envelope-from ken@panzer.kdm.org) Received: (from ken@localhost) by panzer.kdm.org (8.12.5/8.12.5/Submit) id g68Jlhhq066682; Mon, 8 Jul 2002 13:47:43 -0600 (MDT) (envelope-from ken) Date: Mon, 8 Jul 2002 13:47:43 -0600 From: "Kenneth D. Merry" To: Dave Hayes Cc: freebsd-scsi@FreeBSD.ORG Subject: Re: Random hangs on (at least) SCSI reads Message-ID: <20020708134743.A66645@panzer.kdm.org> References: <200207081851.g68Ipc069208@hokkshideh2.jetcafe.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5.1i In-Reply-To: <200207081851.g68Ipc069208@hokkshideh2.jetcafe.org>; from dave@jetcafe.org on Mon, Jul 08, 2002 at 11:51:33AM -0700 Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org On Mon, Jul 08, 2002 at 11:51:33 -0700, Dave Hayes wrote: > Note the following machine: > > FreeBSD dns.apolloi.com 4.5-RELEASE-p4 > ... > ahc0: port 0xd800-0xd8ff mem > 0xff8ff000-0xff8fffff irq 10 at device 1.0 on pci1 > aic7892: Ultra160 Wide Channel A, SCSI Id=7, 32/255 SCBs > ... > ahc1: port 0xd400-0xd4ff mem > 0xff8fd000-0xff8fdfff irq 11 at device 3.0 on pci1 > aic7892: Ultra160 Wide Channel A, SCSI Id=7, 32/255 SCBs > ... > da0 at ahc0 bus 0 target 0 lun 0 > da0: Fixed Direct Access SCSI-3 device > da0: 160.000MB/s transfers (80.000MHz, offset 63, 16bit), Tagged Queueing > Enabled > da0: 35003MB (71687340 512 byte sectors: 64H 32S/T 35003C) > da1 at ahc1 bus 0 target 0 lun 0 > da1: Fixed Direct Access SCSI-3 device > da1: 160.000MB/s transfers (80.000MHz, offset 63, 16bit), Tagged Queueing > Enabled > da1: 35003MB (71687340 512 byte sectors: 64H 32S/T 35003C) > > I can consistently get this to hang (machine locks up, no panic or > anything to console) on multiple machines with the exact same > configuration by reading from the disk at high rates of speed > (e.g. while (1) { find / -exec cat {} \; >/dev/null }). That will probably lead to catting the entire contents of, e.g., /dev/mem, which is a bad thing. How about something like this: while (1) { find / -type f -exec cat {} \; >/dev/null }). > Anyone have any experience with this problem? Yes, I am working on > upgrading it to 4.6-p1. Ken -- Kenneth Merry ken@kdm.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message