PERFORCE change 78828 for review

[Robert Watson]

On Thu, 23 Jun 2005, Peter Wemm wrote:

> On Thursday 23 June 2005 11:44 am, John Baldwin wrote:
>> On Wednesday 22 June 2005 07:12 pm, Peter Wemm wrote:
>>> http://perforce.freebsd.org/chv.cgi?CH=78828
>>>
>>> Change 78828 by peter at peter_melody on 2005/06/22 23:12:33
>>>
>>> 	Freeze things for the dump snapshot.
>>
>> This may be a bad idea since we may panic with sched_lock held and it
>> would be very nice to get a dump there and not just deadlock.
>
> Yeah.  I'm really not sure what to do though because with interrupts
> still happening, it upsets some of the driver dump routines.  eg: when
> you call this from ddb.

Aren't we supposed to be running with interrupts disabled, and having 
IPI'd the other processors to stop (along with a barrier to make sure they 
did), and operating entirely polled?

Robert N M Watson