[Unionfs] repeatable kernel BUG in unionfs 2.1.3

[Shaya Potter]

Erez Zadok wrote:
> In message <46E70D14.5010303 at cs.columbia.edu>, Shaya Potter writes:
>> Just compiled unionfs into 2.6.22.6 and have a repeatable BUG() in a 
>> stress test of mine that unionfs seems to tickle.
>>
>> My unionfs is slightly modified to allow up to 512 branches (simple 
>> header define change).  In this case, I was up to 85 branches when this 
>> occured.
>>
>> here's the backtrace
> 
> But the trace shows that the failure happens deep inside ext3, not unionfs.
> So I'm not sure this is a unionfs bug.  It still could be, if unionfs is
> doing something that indirectly causes ext3 to oops.

I blame it on the original author of the mmap code :) <whistle>