Thanks for your reply and comfirm.
 
Well, what's your opinion of TLB bug?
Is it related to this patch or a new bug?
 
Attached it the new log I've got in 28 machine tests, one crashed.
 
> Date: Mon, 11 Apr 2011 11:08:10 -0700
> From: jeremy@goop.org
> To: tinnycloud@hotmail.com
> CC: giamteckchoon@gmail.com; xen-devel@lists.xensource.com; dave@ivt.com.au; ian.campbell@citrix.com; konrad.wilk@oracle.com; keir@xen.org
> Subject: Re: kernel BUG at arch/x86/xen/mmu.c:1872
> 
> On 04/11/2011 05:31 AM, MaoXiaoyun wrote:
> > Hi:
> >
> > I believe this is the fix at much extent.
> > Since I have my own test cases which with this patch, my test case
> > will success in 30 rounds run.
> > Every round takes 8hours. While without this patch, tests fail evey
> > round in 15minutes.
> >
> > So this really means fix most of the things.
> >
> > But during running, I met another crash, from the log it it looks like
> > has relation with
> > this BUG, since the crash log shows it is tlb related and this BUG
> > also tlb related.
> >
> > Well, I'm also have poor knowledge of kernel.
> > Hope someone from Xen Devel offer some help.
> 
> Thanks for confirming; it makes sense and explains the symptoms, so I'm
> glad it also works ;)
> 
> 
> J