PV i386 patch

[Sean Bruno]

On Sat, 2011-12-17 at 18:01 -0800, Colin Percival wrote:
> On 12/17/11 16:56, Sean Bruno wrote:
> > This seems happy on our ref9 VMs.  I don't suppose this means I can go
> > above 768M of Ram now?
> 
> Can't hurt to try... whatever the problem is with our code and large
> amounts of RAM, the fact that it's an insta-panic during paging setup
> suggests that it's something at a similar level of fail.
> 

Nope, insta panic ... early though.  768M works, 1024M panics.



[root at xen1 sbruno]# /usr/sbin/xm create -c ref9-xen32
Using config file "/etc/xen/ref9-xen32".
Started domain ref9-xen32 (id=109)
WARNING: loader(8) metadata is missing!
GDB: no debug ports present
KDB: debugger backends: ddb
KDB: current backend: ddb
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FreeBSD 9.0-PRERELEASE #0: Sat Dec 17 16:13:02 PST 2011

sbruno at ref9-xen32.freebsd.org:/dumpster/scratch/sbruno-scratch/9/sys/i386/compile/XEN i386
WARNING: WITNESS option enabled, expect reduced performance.
panic: pmap_init: page table page is out of range
cpuid = 0
KDB: enter: panic
[ thread pid 0 tid 0 ]
Stopped at      0xc0181d7a:     movl    $0,0xc0478174