Re: Windows7 crashes inside the VM when starting a certain program

[Gleb Natapov <gleb@redhat.com>]

On Tue, Jul 26, 2011 at 07:29:04AM +0200, André Weidemann wrote:
> On 07.07.2011 07:26, André Weidemann wrote:
> >Hi,
> >I am running Windows7 x64 in a VM which crashes after starting a certain
> >game. Actually there are two games both from the same company, that make
> >the VM crash after starting them.
> >Windows crashes right after starting the game. With the 1st game the
> >screen goes black as usual and the cursor keeps spinning for 3-5 seconds
> >until Windows crashes. With the second game I get to 3D the login
> >screen. The game then crashes after logging in.
> >Windows displays this error message on the first crash:
> >http://pastebin.com/kMzk9Jif
> >Windows then finishes writing the crash dump and restarts.
> >I can reproduce Windows crashing every time I start the game while the
> >VM keeps running without any problems.
> >When Windows reboots after the first crash and the game is started
> >again, the message on the following blue screen changes slightly and
> >stays the same(except for the addresses) for every following crash:
> >http://pastebin.com/jVtBc4ZH
> >
> >I first thought that this might be related to a certain feature in 3D
> >acceleration being used, but Futuremark 3DMark Vantage or 3DMark 11 run
> >without any problems. They run a bit choppy on some occasions, but do
> >that without crashing Windows7 or the VM.
> >
> >How can I proceed to investigate what is going wrong?
> 
> I did some testing and found out that Windows7 does not crash
> anymore when changing "-cpu host" to "-cpu Nehalem". After doing so,
What is your host cpu (cat /proc/cpuinfo)?

> the "only" thing crashing, is the application itself.
> Why is that? What is different between the "real" CPU and the one
> provided by qemu-kvm? How can "-cpu host" cause Windows7 to crash,
> while "-cpu Nehalem" "only" crashes the application.
> 
> I then had WinDbg attach to the process in question. When the game
> crashes the debugger reports an Assertion Failure. This seems so
> happen as soon as the game accesses the network through a certain
> DLL.
> To exclude the emulated e1000 hardware as the cause, I  removed it
> from the VM and passed an Intel network card 82574L to it using
> these lines:
> 
> -device pci-assign,host=04:00.0,id=82574L,addr=0x10 \
> -net none \
> 
> The network card works under Windows7, but the problem of the
> crashing game remains.
> 
> Any ideas on how to track the problem are greatly appreciated.
> 
> 
> Regards
>  André
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--
			Gleb.