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From: Avi Kivity <avi@redhat.com>
To: Matteo Frigo <athena@fftw.org>
Cc: kvm@vger.kernel.org
Subject: Re: Cygwin bash's built-in test command crashes on Windows 2008 Server 64bit under KVM
Date: Fri, 13 Feb 2009 22:27:45 +0200	[thread overview]
Message-ID: <4995D7C1.2070509@redhat.com> (raw)
In-Reply-To: <878woaozu2.fsf@matteo.cilk.lan>

Matteo Frigo wrote:
> Avi Kivity <avi@redhat.com> writes:
>
>   
>> Can you rerun on AMD, but set add npt=0 as a kvm-amd module parameter?
>> This will determine if this is an mmu bug or kvm-intel bug.
>>     
>
> AMD works fine with npt=0, both cygwin and my setjmp()/longjmp() test
> program.  dmesg confirms that nested paging is disabled.
>   

So it isn't the mmu.

I'm a a little far latency-wise from an AMD host.  Can you run this 
experiment on AMD (-monitor stdio will help):

- run a cygwin program in an infinite loop (while :; do :; done is 
sufficient)
- 'info registers', look at gdt
- 'x/28x 0x$GDT'

I'm interested in offset 0x28, but please provide the whole thing for 
sanity checking.

-- 
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.


  reply	other threads:[~2009-02-13 20:27 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <40ddf2480901050654y268213d1jbf34f9d81d6faeb0@mail.gmail.com>
2009-01-05 16:22 ` Cygwin bash's built-in test command crashes on Windows 2008 Server 64bit under KVM Jamie Kirkpatrick
2009-01-22 15:02   ` Avi Kivity
2009-02-06  1:28     ` Matteo Frigo
2009-02-13 20:01       ` Avi Kivity
2009-02-13 20:18         ` Matteo Frigo
2009-02-13 20:27           ` Avi Kivity [this message]
2009-02-13 20:28           ` Avi Kivity
2009-02-13 20:39             ` Matteo Frigo
2009-02-13 21:02               ` Avi Kivity
2009-02-13 21:23                 ` Matteo Frigo
2009-02-13 21:46                   ` Avi Kivity
2009-02-13 21:46                   ` Avi Kivity
2009-02-13 21:49                     ` Matteo Frigo
2009-02-13 21:52                       ` Matteo Frigo
2009-02-13 22:05                         ` Avi Kivity
2009-02-13 22:32                           ` Avi Kivity
2009-02-13 22:46                             ` Matteo Frigo
2009-02-13 22:52                               ` Avi Kivity
2009-02-13 22:06                         ` Avi Kivity

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