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

[Gleb Natapov <gleb@redhat.com>]

On Tue, Jul 26, 2011 at 12:57:44PM +0200, André Weidemann wrote:
> Hi,
> 
> On 26.07.2011 12:08, Gleb Natapov wrote:
> >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 server is currently running on 2 out of 8 cores with kernel boot
> parameter "maxcpus=2".
> 
> flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr
> pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm
> pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good
> xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est
> tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow
> vnmi flexpriority ept vpid
Flags that are present on -cpu host but not -cpu Nehalem (excluding vmx
related flags):

vme dts acpi ss ht tm pbe rdtscp constant_tsc arch_perfmon pebs bts rep_good
xtopology nonstop_tsc aperfmperf dtes64 monitor ds_cpl est tm2 xtpr pdcm  ida 

Some of them may be synthetic and some of them may be filtered by KVM.

Can you try to run "-cpu host,-vme,-dts..." (specifying all of those
flags with -). Drop those that qemu does not recognize. See if result
will be the same as with -cpu Nehalem. If yes, then try to find out with
flag make the difference.

--
			Gleb.