Hang on boot in isp with QLA2342 after upgrading to 6.3

[Sean Bruno]

Graham Allan wrote:
> Graham Allan wrote:
>> On Mon, May 12, 2008 at 12:14:04PM -0500, Graham Allan wrote:
>>> It has been pointed out to me that this kind of weird interaction isn't
>>> exactly unknown in the SAN world, and setting up zoning on the switch
>>> would probably make it go away. So I will also try that (it's probably
>>> a giveway of a SAN novice that I hadn't already done so - it certainly
>>> does sound like it would help). But if the hang does point to a problem
>>> in the driver, I'm also happy to keep trying different things in the
>>> hope of revealing where the problem actually lies.
>>
>> Replying to my own message here.
>>
>> The good news for me is that setting up zoning in the switch does fix
>> (or at least hide) the problem on this server for me.
>>
>> The bad news is, I believe I'm seeing a similar kind of behaviour on a
>> completely different 6.3 setup. Haven't had time to fully characterise
>> it yet, but in short... Dell 1950 with QLA2342, connected directly to
>> an EMC CX300 array. Very often (lets say unpredictably 50% of time)
>> hangs during boot at exactly the same point as the first system, right
>> around the time it would be probing for drives.
>
> So I guess one thing I could do is build a kernal with debugging 
> support (and possibly the "deadlock recipe" from the freebsd 
> handbook), and force it to the debugger when it hangs. Then I could at 
> least get some tracebacks and other information - though as it never 
> actually panics I'm not sure how useful the information will be - I 
> guess it's likely stuck in a loop somehow. It should give some clue.
>
> Does that sound like a reasonable idea? Does the kernel version matter 
> (eg standard 6.3 vs RELENG_6)? Is this list the most appropriate place 
> for me to talk about the issue?
>
> (I also think I should double-check 6.2 again, as its release notes 
> indicate it was where isp was synced from CURRENT - I'd think it 
> should have the same issue).
>
> Thanks for everyones interest,
>
> Graham
> _______________________________________________

If you can, I'd do the testing with RELENG_7. 

Sean