general protection fault on boot.
John Baldwin
jhb at freebsd.org
Wed Sep 9 18:46:53 UTC 2009
On Wednesday 09 September 2009 1:38:59 pm John Baldwin wrote:
> On Wednesday 09 September 2009 12:32:51 pm Vincent Hoffman wrote:
> > Hi all,
> > I've been running the 8.0-BETAs in a xen virtual machine
> > (hvm/fully virtualised) for testing and something between r196730 and
> > r196746 causes a general protection fault on boot. I'll try and narrow
> > it down if i get a chance but I'm a a bit busy at the moment.
> >
> > backtrace is available at
> > http://unsane.co.uk/~jhary/freebsd/GPF-09-09-09.gif
> > Xen dom0 is a centos5.3 box using the xen-3.3.1 rpms from
> > http://www.gitco.de/linux/i386/centos/5/rpms/ if thats of any use.
> >
> > Let me know if I need to provide any more info.
>
> Hmm, can you try reverting 196737? Or actually, can you print out the value
> of %ebx ('p $ebx' in ddb will work I think)? I wonder if this patch would
> fix it:
>
> Index: pmap.c
> ===================================================================
> --- pmap.c (revision 196974)
> +++ pmap.c (working copy)
> @@ -999,7 +999,7 @@
> * coherence domain.
> */
> mfence();
> - for (; sva < eva; sva += cpu_clflush_line_size)
> + for (; sva <= eva; sva += cpu_clflush_line_size)
> clflush(sva);
> mfence();
> } else {
This patch is probably bogus. I am curious what %ebx is however.
--
John Baldwin
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