Re: [Xen-devel] kernel BUG at arch/x86/xen/mmu.c:1860!

[Teck Choon Giam <giamteckchoon@xxxxxxxxx>]

On Wed, Mar 9, 2011 at 4:10 AM, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> wrote:

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.

Yep... it takes sometime to hit this bug and if you run my test script without any guest running will be faster to reproduce it.

May I know what is your normal development platform/distribution for xen?  I hope this isn't just distribution specific issue for PVOPS stable/xen-2.6.32.x Dom0... ... mostly not as from this thread alone I see someone saying they hit this bug as well and I believe they are not running CentOS 5.x... guess is debian based distribution.

Thanks.

Kindest regards,
Giam Teck Choon

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