general protection fault on boot.

[John Baldwin]

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 {

-- 
John Baldwin