Date: Tue, 15 Dec 1998 08:30:01 -0800 (PST) From: "Kenneth D. Merry" <ken@plutotech.com> To: freebsd-bugs@FreeBSD.ORG Subject: Re: kern/9092: DELF raid volumes cause panics under CAM Message-ID: <199812151630.IAA11034@freefall.freebsd.org>
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The following reply was made to PR kern/9092; it has been noted by GNATS. From: "Kenneth D. Merry" <ken@plutotech.com> To: geoffb@demon.net Cc: freebsd-gnats-submit@FreeBSD.ORG Subject: Re: kern/9092: DELF raid volumes cause panics under CAM Date: Tue, 15 Dec 1998 09:22:44 -0700 (MST) geoffb@demon.net wrote... > > >Number: 9092 > >Category: kern > >Synopsis: DELF raid volumes cause panics under CAM > >Confidential: no > >Severity: non-critical > >Priority: low > >Responsible: freebsd-bugs > >State: open > >Quarter: > >Keywords: > >Date-Required: > >Class: sw-bug > >Submitter-Id: current-users > >Arrival-Date: Tue Dec 15 06:10:01 PST 1998 > >Last-Modified: > >Originator: Geoff Buckingham > >Organization: > Demon Internet > >Release: 3.0-RELEASE > >Environment: > FreeBSD prometheus.noc.demon.net 3.0-RELEASE FreeBSD 3.0-RELEASE #3: Tue Dec 15 10:43:17 GMT 1998 > >Description: > Compuer Associated DELFRaid Logical volumes do not interact correctly > with CAM, the proper level of TAG command queing is not reached. (The > volumes are nominally capable of queing 32, CAM only gets down to 64 > many SCSI errors plus kernel panics result. > > With maxtags set to 32 as detailed they tend to reduce to 26 or 24 still > :-( > > >How-To-Repeat: > Buy a DELF raid unit and exercise it: > > bonnie -s 1000 will allways panic my system. > > >Fix: > Add the following to cam_xpt.c [ ... ] I'm glad you were able to work around the problem, but if you're getting kernel panics, that indicates a problem that may still exist in -current. Can you provide a stack trace from the panic? What sort of SCSI errors did you see? Ken -- Kenneth Merry ken@plutotech.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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