Date: Sat, 13 Apr 2002 18:20:41 +0100 From: Web and Middleware Administrator <webadmin@firstcallgroup.co.uk> To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/37043: Latest stable causes SCSI bus freeze on sym0 when running SMP Message-ID: <E16wRCb-0001d4-00@mailhost.firstcallgroup.co.uk>
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>Number: 37043 >Category: kern >Synopsis: Latest stable causes SCSI bus freeze on sym0 when running SMP >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Sat Apr 13 10:30:01 PDT 2002 >Closed-Date: >Last-Modified: >Originator: Pete French <pfrench@firstcallgroup.co.uk> >Release: FreeBSD 4.5-STABLE i386 >Organization: Seatem UK Limited >Environment: System: FreeBSD tixlink1.firstcallgroup.co.uk 4.5-STABLE FreeBSD 4.5-STABLE #0: Fri Apr 12 14:13:48 BST 2002 webadmin@tixlink1.firstcallgroup.co.uk:/usr/obj/usr/src/sys/TIXLINK1 i386 Machine is a Compaq Proliant server. SMP machine with two 550MHz Pentium III processors. Onboard Symbios SCSI controller driving a pair of 9.1GB Compaq UW drives. Second SCSI controller attached to a tape drive. 256MB of memory, Thunderland 1000MBit ether interface. >Description: After updating to the latest -STABLE (12/04/2002) the machine will now freeze giving the error message: (noperiph:sym0:0:-1:-1): SCSI BUS reset detected It will sometimes then recover from this and continue, but will occasionally freeze completely. The machine ran fine on 4.5-STABLE froom just fater 4.5-RELEASE, and this has only shown up on the latest upgrade. The problem appears to be related to heavy disc activity involving both drives at once. It also *only* occurs under SMP. Running a non SMP kernel solves the problem. >How-To-Repeat: Under my setup I can easly cause this to happen by using two copy commands one after the other: cp src/cgi-bin/*.exe /usr/local/www/beta/cgi-bin/ cp src/cgi-bin/*.exe /usr/local/www/live/cgi-bin/ The second copy command freezes almost instantly. In this case the source of the files and the destination are on separate discs. >Fix: The easiest workaround is to run the machine non-SMP. This is not acceptable long term, however, and the machine has run happily as an SMP box until now. >Release-Note: >Audit-Trail: >Unformatted: To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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