From mboxrd@z Thu Jan  1 00:00:00 1970
From: Avi Kivity <avi@redhat.com>
Subject: Re: applications running in KVM crashing?
Date: Wed, 14 Jul 2010 17:00:39 +0300
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Cc: KVM list <kvm@vger.kernel.org>, nikola.ciprich@linuxbox.cz,
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To: Nikola Ciprich <extmaillist@linuxbox.cz>
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On 07/14/2010 04:41 PM, Nikola Ciprich wrote:
>> disassembly around the failure please.
>>      
> hmm, is this what You want?
>
> (gdb) disas 0x00007f6391472273
> 0x00007f6391472273<pthread_rwlock_rdlock+99>:  lock decl (%rdi)
>    

By coincidence, a patch was sent yesterday fixing lock decl.  Can you 
try it out?

commit cb7eaecb3389c7fa2490ea1bee8f10cfa5df30d4
Author: Gleb Natapov <gleb@redhat.com>
Date:   Tue Jul 13 16:40:23 2010 +0300

     KVM: x86: emulator: inc/dec can have lock prefix

     Mark inc (0xfe/0 0xff/0) and dec (0xfe/1 0xff/1) as lock prefix 
capable.

     Signed-off-by: Gleb Natapov <gleb@redhat.com>
     Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

Although userspace code shouldn't invoke the emulator in most situations.

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