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From: Chris Lalancette <clalance@redhat.com>
To: Wei Jiang <WEI.JIANG@sierraatlantic.com>
Cc: xen-devel@lists.xensource.com, xen-users@lists.xensource.com
Subject: Re: Re: [Xen-users] xen-3.0.3 occur kernel panic
Date: Tue, 26 Feb 2008 23:30:14 -0500	[thread overview]
Message-ID: <47C4E756.9000009@redhat.com> (raw)
In-Reply-To: <47C4E536.4080302@SierraAtlantic.com>

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

      parent reply	other threads:[~2008-02-27  4:30 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <47BB88CD.4040907@SierraAtlantic.com>
     [not found] ` <47BC6412.9010506@redhat.com>
2008-02-25  6:59   ` [Xen-users] xen-3.0.3 occur kernel panic Wei Jiang
2008-02-25  6:59   ` Wei Jiang
     [not found]   ` <47C2673B.2080108@SierraAtlantic.com>
2008-02-25 16:01     ` Chris Lalancette
2008-02-27  4:21       ` Wei Jiang
2008-02-27  4:21       ` Wei Jiang
     [not found]       ` <47C4E536.4080302@SierraAtlantic.com>
2008-02-27  4:30         ` Chris Lalancette [this message]

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