Re: [Xen-devel] Getting mm.c errors from xl dmesg on certain hardware

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

On Fri, Sep 23, 2011 at 11:29:31AM +0100, Anthony Wright wrote:
> Konrad Rzeszutek Wilk wrote:
> 
> >> (XEN) mm.c:907:d0 Error getting mfn 3a09c (pfn 55555555) from L1 entry 
> >> 000000003a09c023 for l1e_owner=0, pg_owner=0
> >> (XEN) mm.c:907:d0 Error getting mfn 3a09d (pfn 55555555) from L1 entry 
> >> 000000003a09d023 for l1e_owner=0, pg_owner=0
> >> (XEN) mm.c:907:d0 Error getting mfn 3a09e (pfn 55555555) from L1 entry 
> >> 000000003a09e023 for l1e_owner=0, pg_owner=0
> >> (XEN) mm.c:907:d0 Error getting mfn 3a09f (pfn 55555555) from L1 entry 
> >> 000000003a09f023 for l1e_owner=0, pg_owner=0
> >> (XEN) traps.c:2388:d0 Domain attempted WRMSR c0010004 from 
> >> 0x0000ab23d6d622da to 0x000000000000abcd.
> > Do they show up during bootup? As in do you see those _when_ you launch 
> > your guests?
> > To figure out this particular issue you should try using 'console_to_ring' 
> > (so that
> > dom0 output and Xen output are mingled togehter) and also post this under a 
> > new subject
> > to not confuse this email thread.
> The messages show up during the initial dom0 boot, before any domUs are
> loaded. I've attached a second xl dmesg log which is similar to the
> first, but the numbers in the error messages are different.
> 
> The messages are hardware dependant as I don't get them on another
> system with different hardware configuration but with identical software.
> 
> The motherboard is a ASUS M2N68 AM PLUS, with 4GB of RAM. If I remove
> one of the sticks of ram to take it down to 2GB, the mm.c errors are no
> longer displayed, but I still get the traps.c message.
> 

Um, you might want to include 'loglevel=9 console=hvc0 initcall_debug' on your 
Linux line
so the output from Linux kernel gets intermingled with the Xen.

> mapping kernel into physical memory
> Xen: setup ISA identity maps
> about to get started...
> (XEN) mm.c:907:d0 Error getting mfn 3809c (pfn b602c) from L1 entry 
> 000000003809c023 for l1e_owner=0, pg_owner=0
> (XEN) mm.c:907:d0 Error getting mfn 3809d (pfn b602d) from L1 entry 
> 000000003809d023 for l1e_owner=0, pg_owner=0
> (XEN) mm.c:907:d0 Error getting mfn 3809e (pfn b602e) from L1 entry 
> 000000003809e023 for l1e_owner=0, pg_owner=0
> (XEN) mm.c:907:d0 Error getting mfn 3809f (pfn b602f) from L1 entry 
> 000000003809f023 for l1e_owner=0, pg_owner=0
> (XEN) traps.c:2388:d0 Domain attempted WRMSR c0010004 from 0x00009b27fe9726ca 
> to 0x000000000000abcd.

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