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Date:      Thu, 30 Mar 2000 07:59:37 -0800 (PST)
From:      M.Indlekofer@fz-juelich.de
To:        freebsd-gnats-submit@FreeBSD.org
Subject:   i386/17690: SCSI hangs on SMP kernel (4.0-RELEASE)
Message-ID:  <200003301559.HAA28423@freefall.freebsd.org>

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>Number:         17690
>Category:       i386
>Synopsis:       SCSI hangs on SMP kernel (4.0-RELEASE)
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Mar 30 08:00:01 PST 2000
>Closed-Date:
>Last-Modified:
>Originator:     Michael Indlekofer
>Release:        4.0-RELEASE
>Organization:
Forschungszentrum Juelich GmbH, Germany
>Environment:
FreeBSD deanna.isi.kfa-juelich.de 4.0-RELEASE FreeBSD 4.0-RELEASE #3: Thu Mar 30 15:50:03 CEST 2000     root@deanna.isi.kfa-juelich.de:/usr/src/sys/compile/MYKERNEL.3  i386
>Description:
SMP kernel (4.0-RELEASE) on dual PentiumII system
hangs in SCSI probe phase at boot time.
Infinite loop of SCSI bus resets (probeX:ahc0:0:X:0 SCB ... timeout...).
Non-SMP kernel (4.0-RELEASE) works.
SMP kernel (3.1-RELEASE) worked without problems.
Hardware:
Dual PentiumII 450MHz (ASUS P2B-DS mainboard)
Adaptec aic7890/91 Ultra2 SCSI adapter on board

>How-To-Repeat:
e.g. /sys/i386/conf/GENERIC SMP activated kernel:
remove cpu I386_CPU and cpu I486_CPU,
enable options SMP and options APIC_IO
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted:


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