From owner-freebsd-bugs  Wed Jun 16  8:10: 4 1999
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Date: Wed, 16 Jun 1999 08:06:13 -0700 (PDT)
From: m.seaman@inpharmatica.co.uk
To: freebsd-gnats-submit@freebsd.org
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Subject: bin/12243: NFS re-mount from Solaris 7 server hangs 
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>Number:         12243
>Category:       bin
>Synopsis:       NFS re-mount from Solaris 7 server hangs
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Jun 16 08:10:01 PDT 1999
>Closed-Date:
>Last-Modified:
>Originator:     Matthew Seaman
>Release:        3.2-STABLE
>Organization:
Inpharmatica Ltd.
>Environment:
b0# uname -a 
FreeBSD b0.farm.inpharmatica.co.uk 3.2-STABLE FreeBSD 3.2-STABLE #0: Wed Jun 16 13:56:36 BST 1999     root@b9.farm.inpharmatica.co.uk:/usr/src/sys/compile/FARM  alpha

(also verified on 3.2-STABLE/i586)
>Description:
NFS mounts from a solaris server onto a FreeBSD client will often hang
with the mount_nfs process stuck in uninteruptible wait (`D' in ps(1)
output).  The first time that a filesystem is mounted (eg. from
/etc/fstab), the mount will usually succeed.  Unmounting and then
attempting to mount the same filesystem again results in the hang --- 
amd(8) will trigger this behaviour quite reliably.  Forcing nfs v2
makes no difference.  Occasionally an attempted mount will cause the
whole machine to freeze: in any case the only way I've found to get
rid on the hung mount_nfs process is to reboot.

Mounting from other unix (FreBSD, Linux) servers doesn't result in hangs.  
>How-To-Repeat:

mount -t nfs -o rw solaris-server:/filesystem /mnt
umount /mnt
mount -t nfs -o rw solaris-server:/filesystem /mnt
>Fix:
Not known

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


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