Re: BUG: unable to handle kernel paging request - balloon_init - xen-4.1.0 - 2.6.32.39

[Scott Garron <xen-devel@sce.pridelands.org>]

On 04/29/2011 03:38 PM, Dan Magenheimer wrote:
> Since you are using dom0_mem, there really should be no reason why
> the balloon driver needs to get initialized.  For the balloon driver
> to work properly, it needs a correct E820 map and there have been
> recent upstream changes in the balloon driver involving E820.  If we
> assume that your E820 map is indeed broken, the easiest fix for your
> machine might be just to modify balloon_init in dom0 to immediately
> fail (and return -ENODEV).

      Returning -ENODEV at the beginning of balloon_init() did allow the
machine to boot, but something is definitely still amiss:

      Trying to start any domUs yields:

simba@hailstorm:~$ sudo xm create test.cfg
Using config file "/etc/xen/test.cfg".
Error: Failed to query current memory allocation of dom0.

      Oddly enough, xencommons and xend started and xm list and xm info
show everything correctly.

      And this is just bizarre...

simba@hailstorm:~$ free
              total       used       free     shared    buffers     cached
Mem:           552 18014398509158460     324076          0      11428
    34656
-/+ buffers/cache: 18014398509112376     370160
Swap:            0          0          0


      I just tried grabbing the most recent BIOS revision from Tyan for
this motherboard (was running 2882_306, flashed it to 2882_309).  Same
results.

-- 
Scott Garron