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Date:      Fri, 25 Nov 2011 11:56:00 +0100
From:      =?ISO-8859-1?Q?Gustau_P=E9rez?= <gperez@entel.upc.edu>
To:        freebsd-emulation@freebsd.org
Subject:   Freeze with 10.0 and VirtualBox {4.1.4|4.1.6|4.1.51r38464}
Message-ID:  <4ECF7440.4070300@entel.upc.edu>

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   Hi,

   I'm seeing freezes with AMD64/CURRENT r227817 (as of Nov 22th). The 
machine freezes hard when starting a virtual machine. It used work a few 
weeks ago.

   I've been using Bernhard's from a lot of time. 4.1.4 from a month ago 
freezes. I had to apply the patch to fix the D_PSEUDO problem. I see it 
was posted in the vbox mailing lists and commited upstream. So I 
yesterday picked last virtualbox-port.tar.gz version at 
http://svn.bluelife.at/nightlies. 4.1.6 included there also freezes the 
machine.

   So I recompiled the kernel with WITNESS, DEADLKRES and friends I see 
a deadlock. This is the trace I got in my messages after rebooting the 
machine:

                Nov 25 08:57:06 portgus kernel: acquiring duplicate lock 
of same type: "IPRT Fast Mutex Semaphore"
                Nov 25 08:57:06 portgus kernel: acquiring duplicate lock 
of same type: "IPRT Fast Mutex Semaphore"
                Nov 25 08:57:06 portgus kernel: 1st IPRT Fast Mutex 
Semaphore @ \
                  
/usr/ports/emulators/virtualbox-ose-kmod/work/VirtualBox-4.1.6_OSE/out/freebsd.amd64/release/bin/src/vboxdrv/r0drv/freebsd/semfastmutex-r0drv-freebsd.c:100

   I don't know if I'll have time to check this. I will try the versions 
in the ports tree (4.012?) but if it works it will allow us to work 
until 4.1.X gets into the tree.

   Any help will be appreciated.

   Gustau




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