7.1 panic "vm_page_startup: inconsistent page counts"

[Alan Cox]

Peter Jeremy wrote:
> On 2009-Mar-12 08:46:50 -0400, John Baldwin <jhb at freebsd.org> wrote:
>   
>> On Thursday 12 March 2009 12:36:46 am Peter Jeremy wrote:
>>     
>>> I'm trying to upgrade an 11 month old FreeBSD 7 image in a VMware
>>> 4.5.2 guest to an up-to-date -stable and it panics as above.  I've
>>> added a printf to report the two counts and there's a difference of
>>> one page.  I don't have any problems with the old 7-stable image or
>>> up-to-date 6-stable or -current using the same VMware version.
>>>
>>> A screendump for a verbose boot can be found at
>>> http://imagebin.ca/img/wahNNw.gif
>>>
>>> Can I safely delete the assert?
>>>       
>> I don't think so, I would report it to Alan.  The one earlier report of this 
>> didn't include the detail that it was only off by one page.
>>     
>
> This is a bit moot now since you've disabled the test but rolling back
> to a kernel from 26th Feb (before the superpages MFC) doesn't have the
> page count discrepancy.
>
>   

It's useful to know that the older kernel doesn't fail the assertion.  
Thanks.

Alan