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Date: Tue, 12 May 1998 12:05:41 +0200 (MEST)
From: hans@artcom.de
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Subject: kern/6603: ncr driver hangs under high load
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>Number:         6603
>Category:       kern
>Synopsis:       ncr driver hangs under high load
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:
>Keywords:
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue May 12 03:10:01 PDT 1998
>Last-Modified:
>Originator:     Hans Huebner
>Organization:
Art+Com GmbH
>Release:        FreeBSD 2.2.6-RELEASE i386
>Environment:

FreeBSD-2.2.6-RELEASE, P200, HX-Based MB, SYM22802 SCSI controller (w/diff),
four IBM DCHS09X drives on first SCSI channel, root on sd0, sd1/2/3 striped
together as ccd.

>Description:

Under load, the ncr driver hangs while accessing the stripe set.

ncr0:3: ERROR (a0:0) (8-28-0) (f/9d) @ (script 928:1807f580).
ncr0: script cmd = 88030000
ncr0: regdump: da 10 80 9d 47 0f 02 07 03 08 83 28 80 00 00 08.
ncr0: restart (fatal error).
sd3(ncr0:3:0): COMMAND FAILED (9 ff) @f0d80800.
sd2(ncr0:2:0): COMMAND FAILED (9 ff) @f0d80c00.
sd1(ncr0:1:0): COMMAND FAILED (9 ff) @f0d7c000.
ncr0: timeout ccb=f0d80800 (skip)
ncr0: timeout ccb=f0d80c00 (skip)
ncr0: timeout ccb=f0d7c000 (skip)
ncr0: timeout ccb=f0d7c400 (skip)


>How-To-Repeat:

The problem is triggered by 'make world', or by extracting files from
a tape drive.

>Fix:
	

>Audit-Trail:
>Unformatted:
Hans Huebner

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