From mboxrd@z Thu Jan  1 00:00:00 1970
From: Chris Lalancette <clalance@redhat.com>
Subject: Re: Re: [Xen-users] xen-3.0.3 occur kernel panic
Date: Tue, 26 Feb 2008 23:30:14 -0500
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To: Wei Jiang <WEI.JIANG@sierraatlantic.com>
Cc: xen-devel@lists.xensource.com, xen-users@lists.xensource.com
List-Id: xen-devel@lists.xenproject.org

Wei Jiang wrote:
> Hi
> 
> About such a issue, are there any code changes?
> 

Yes.  In 5.1 we "fixed" it by removing the nopage handler from privcmd;
having VM_PFNMAP with a nopage handler just makes no sense.  However,
the problem with it is that if userland did something it wasn't supposed
 to, it would actually get a page full of zeros instead of a SIGBUS.  In
5.2 I believe we have added a nopfn handler which returns SIGBUS if the
userland program does the wrong thing.

Chris Lalancette