From mboxrd@z Thu Jan  1 00:00:00 1970
From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Subject: Re: kernel BUG at arch/x86/xen/mmu.c:1860!
Date: Tue, 8 Mar 2011 15:10:02 -0500
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On Tue, Mar 08, 2011 at 02:29:50PM -0500, Konrad Rzeszutek Wilk wrote:
> > Yes.  All are set in my kernel config and I believed Konrad has my kernel
> > config.  I didn't use nomodeset as my servers don't have those graphic
> > cards... ...
> 
> I am having a hard-time reproducing this. I made six LV's:

Aha!

respawning too fast: disabled for 5 minutes
INIT: Id "co" respawning too fast: disabled for 5 minutes
INIT: Id "co" respawning too fast: disabled for 5 minutes
INIT: Id "co" respawning too fast: disabled for 5 minutes
(XEN) mm.c:2364:d0 Bad type (saw 7400000000000001 != exp 3000000000000000) for mfn 354e0 (pfn c76d7)
(XEN) mm.c:942:d0 Attempt : entry 255
(XEN) mm.c:2117:d0 Error while validating mfn 35620 (pfn c7417) for type 4000000000000000: caf=8000000000000003 taf=4000000000000001
(XEN) mm.c:2733:d0 Error while pinning mfn 35620
(XEN) mm.c:2364:d0 Bad type (saw 7400000000000001 != exp 3000000000000000) for mfn 354e0 (pfn c76d7)
(XEN) mm.c:942:d0 Attempt to create linear p.t. with write perms
(XEN) mm.c:1487:d0 Failure in alloc_l4_table: entry 255
(XEN) mm.c:2117:d0 Error while validating mfn 3b286 (pfn c187d) for type 4000000000000000: caf=8000000000000003 taf=4000000000000001
(XEN) mm.c:2733:d0 Error while pinning mfn 3b286
(XEN) mm.c:2364:d0 Bad type (saw 7400000000000001 != exp 3000000000000000) for mfn 354e0 (pfn c76d7)
(XEN) mm.c:942:d0 Attempt to create linear p.t. with write perms
(XEN) mm.c:1487:d0 Failure in alloc_l4_table: entry 255
(XEN) mm.c:2117:d0 Error while validating mfn 35620 (pfn c7417) for type 4000000000000000: caf=8000000000000003 taf=4000000000000001
(XEN) mm.c:2500:d0 Error while installing new baseptr 35620
(XEN) mm.c:2364:d0 Bad type (saw 7400000000000001 != exp 3000000000000000) for mfn 354e0 (pfn c76d7)
(XEN) mm.c:942:d0 Attempt to create linear p.t. with write perms
(XEN) mm.c:1487:d0 Failure in alloc_l4_table: entry 255
(XEN) mm.c:2117:d0 Error while validating mfn 3b286 (pfn c187d) for type 4000000000000000: caf=8000000000000003 taf=4000000000000001
(XEN) mm.c:2825:d0 Error while installing new mfn 3b286
(XEN) mm.c:2794:d0 Mfn 35620 not pinned
(XEN) mm.c:2794:d0 Mfn 3b286 not pinned

Takes a bit of time to reproduce it, but I can reproduce it on my CentOS 5.5 OS.