linux-kernel - Re: qemu-kvm loops after kernel udpate

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Message-ID: <5051AE8B.7090904@redhat.com>
Date:	Thu, 13 Sep 2012 12:59:39 +0300
From:	Avi Kivity <avi@...hat.com>
To:	Jiri Slaby <jslaby@...e.cz>
CC:	Jiri Slaby <jirislaby@...il.com>,
	Marcelo Tosatti <mtosatti@...hat.com>, kvm@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: qemu-kvm loops after kernel udpate

On 09/12/2012 09:11 PM, Jiri Slaby wrote:
> On 09/12/2012 10:18 AM, Avi Kivity wrote:
>> On 09/12/2012 11:13 AM, Jiri Slaby wrote:
>>>
>>>>  Please provide the output of vmxcap
>>>> (http://goo.gl/c5lUO),
>>>
>>>   Unrestricted guest                       no
>> 
>> The big real mode fixes.
>> 
>> 
>>>
>>>> and a snapshot of kvm_stat while the guest is hung.
>>>
>>> kvm statistics
>>>
>>>  exits                                      6778198  615942
>>>  host_state_reload                             1988     187
>>>  irq_exits                                     1523     138
>>>  mmu_cache_miss                                   4       0
>>>  fpu_reload                                       1       0
>> 
>> Please run this as root so we get the tracepoint based output; and press
>> 'x' when it's running so we get more detailed output.
> 
> kvm statistics
> 
>  kvm_exit                                  13798699  330708
>  kvm_entry                                 13799110  330708
>  kvm_page_fault                            13793650  330604
>  kvm_exit(EXCEPTION_NMI)                    6188458  330604
>  kvm_exit(EXTERNAL_INTERRUPT)                  2169     105
>  kvm_exit(TPR_BELOW_THRESHOLD)                   82       0
>  kvm_exit(IO_INSTRUCTION)                         6       0

Strange, it's unable to fault in the very first page.

Please provide a trace as per http://www.linux-kvm.org/page/Tracing (but
append -e kvmmmu to the command line).



-- 
error compiling committee.c: too many arguments to function
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