NetBSD Problem Report #41811
From www@NetBSD.org Tue Aug 4 05:37:27 2009
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Date: Tue, 4 Aug 2009 05:37:27 +0000 (UTC)
From: lloyd@must-have-coffee.gen.nz
Reply-To: lloyd@must-have-coffee.gen.nz
To: gnats-bugs@NetBSD.org
Subject: mounting unconfigured vnd devices causes a hang
X-Send-Pr-Version: www-1.0
>Number: 41811
>Category: kern
>Synopsis: mounting unconfigured vnd devices causes a hang
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: kern-bug-people
>State: closed
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Tue Aug 04 05:40:00 +0000 2009
>Closed-Date: Sun Jun 03 11:12:01 +0000 2018
>Last-Modified: Sun Jun 03 11:12:01 +0000 2018
>Originator: Lloyd Parkes
>Release: 5.99.12
>Organization:
Must Have Coffee
>Environment:
NetBSD evbarm 5.99.12 NetBSD 5.99.12 (TS7200) #3: Tue Aug 4 15:54:46 NZST 2009 lloyd@rhox.must-have-coffee.gen.nz:/vol/scratch/build-gsoc/obj.evbarm/sys/arch/evbarm/compile/TS7200 evbarm
>Description:
Trying to mount a filesystem from a vnd device before you have remembered to configure the device causes the mount command to hang.
# /sbin/mount -t ffs /dev/vnd1a /mnt
^C
# ps ax
PID TTY STAT TIME COMMAND
0 ? DKl 0:23.48 [system]
1 ? Is 0:00.24 init
204 ? D 0:00.04 mount_ffs /dev/vnd1a /mnt
230 ? Is 0:00.83 login
234 ? S 0:00.16 -csh
235 ? O+ 0:00.07 ps -ax
>How-To-Repeat:
/sbin/mount -t ffs /dev/vnd1a /mnt
>Fix:
>Release-Note:
>Audit-Trail:
State-Changed-From-To: open->analyzed
State-Changed-By: pooka@NetBSD.org
State-Changed-When: Tue, 04 Aug 2009 12:57:57 +0300
State-Changed-Why:
This is a combinaton of the new module autoload code doing vnode
unlock in spec_open() and the historic behaviour of file systems
not locking the device vnode mounttime due the possibility of
deadlock. In other words, it's another fine lose/lose mess someone
else will be happy to deal with.
State-Changed-From-To: analyzed->closed
State-Changed-By: maya@NetBSD.org
State-Changed-When: Sun, 03 Jun 2018 11:12:01 +0000
State-Changed-Why:
Can't reproduce with -current. I suspect this was fixed in the meantime. Feel free to reply if it is indeed unfixed in some scenario.
>Unformatted:
(Contact us)
$NetBSD: query-full-pr,v 1.43 2018/01/16 07:36:43 maya Exp $
$NetBSD: gnats_config.sh,v 1.9 2014/08/02 14:16:04 spz Exp $
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