Re: [Xen-devel] 2.6.32.27 dom0 + latest xen staging boot failure

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Fri, Jan 28, 2011 at 10:28:43AM -0500, Konrad Rzeszutek Wilk wrote:
> On Thu, Jan 27, 2011 at 10:51:42AM -0800, Kay, Allen M wrote:
> > Following are the brief error messages from the serial console log.  I have 
> > also attached the full serial console log and dom0 system map.
> > 
> > (XEN) mm.c:802:d0 Bad L1 flags 400000
> 
> On a second look, this is a different issue than I had encountered.
> 
> The 400000 translates to Xen thinking you had PAGE_GNTTAB set, but that
> is not right. Googling for this shows that I had fixed this with a
> Xorg server at some point, but I can't remember the details so that is not
> that useful :-(
> 
> You said it works if you give the domain 1024MB, but I wonder if
> it also works if you disable the IOMMU? What happens then?

Can you also patch your Xen hypervisor with this patch? It will print out the
other 89 entries so we can see what type of values they have.. You might need to
move it a bit as this is for xen-unstable.

diff -r 003acf02d416 xen/arch/x86/mm.c
--- a/xen/arch/x86/mm.c Thu Jan 20 17:04:06 2011 +0000
+++ b/xen/arch/x86/mm.c Fri Jan 28 10:46:13 2011 -0500
@@ -1201,11 +1201,12 @@
     return 0;
 
  fail:
-    MEM_LOG("Failure in alloc_l1_table: entry %d", i);
+    MEM_LOG("Failure in alloc_l1_table: entry %d of L1 (mfn: %lx). Other L1 
values:", i, pfn);
     while ( i-- > 0 )
-        if ( is_guest_l1_slot(i) )
+        if ( is_guest_l1_slot(i) ) {
+            MEM_LOG("L1[%d] = %lx", i, (unsigned long)l1e_get_intpte(pl1e[i]));
             put_page_from_l1e(pl1e[i], d);
-
+       }
     unmap_domain_page(pl1e);
     return -EINVAL;
 }

> 
> > (XEN) mm.c:1204:d0 Failure in alloc_l1_table: entry 90
> > (XEN) mm.c:2142:d0 Error while validating mfn 1d7e97 (pfn 3d69) for type 
> > 1000000
> > 000000000: caf=8000000000000003 taf=1000000000000001
> > (XEN) mm.c:2965:d0 Error while pinning mfn 1d7e97
> > (XEN) traps.c:451:d0 Unhandled invalid opcode fault/trap [#6] on VCPU 0 
> > [ec=0000
> > ]
> > (XEN) domain_crash_sync called from entry.S
> > (XEN) Domain 0 (vcpu#0) crashed on cpu#0:
> 
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