Problem remains with FreeBSD 6.0-RC1 as seen in RELENG_5

[Philip Kizer]

On Oct 25, 2005, at 05:07, Robert Watson wrote:
> There are a couple of possible sources, so if this is reproduceable  
> and you don't mind trying some diagnostic patches, I've attached a  
> first one below.  This checks for the case where the looping in the  
> unp_gc() routine becomes unbounded due to a possible lack of  
> synchronization in the handling of marking and counting of  
> marking.  It needs INVARIANTS to be compiled in to work; if it  
> fires, this will suggest an avenue to explore.

Well, it's been a few days since the last time I heard from anyone  
that had been helping me with this and I only recall seeing one  
diagnostic patch to apply (that does not seem to have been triggered  
in subsequent hangs).

Have there been any more patches I've missed that would help either  
the problem or diagnostics?

With that, I had another pair of examples last night again, one for  
each version of the OS:

     http://www.nostrum.com/hang/hang.RELENG_6-trace-2005-10-29-0.txt
     http://www.nostrum.com/hang/hang.RELENG_5-trace-2005-10-29-0.txt

Any other suggestions or pointers on how to identify this livelock?


Thank you,
Philip