Jens Axboe wrote:
> On Mon, Jan 31 2005, Douglas Gilbert wrote:
> 
>>Jens Axboe wrote:
>>
>>>On Mon, Jan 31 2005, Fabio Coatti wrote:
>>>
>>>
>>>>Alle 09:00, luned́ 31 gennaio 2005, Jens Axboe ha scritto:
>>>>
>>>>
>>>>>>At this point k3b is stuck in D stat, needs reboot.

I was able to replicate this with a USB burner.
My system didn't need a reboot. The "D" state was locked
on "blk_execute_rq". The burner was still accessible via
sg.

>>>>>The most likely suspect is the REQ_BLOCK_PC scsi changes. Can you try
>>>>>2.6.11-rc2-mm1 with bk-scsi backed out? (attached)
>>>>
>>>>just tried, right guess :)
>>>>backing out that patch the problem disappears.
>>>>Let me know if you need to narrow further that issue.
>>>
>>>
>>>Doug, it looks like your REQ_BLOCK_PC changes are buggy. Let me know if
>>>you cannot find the full post and I'll forward it to you.
>>
>>Jens,
>>Hmm. Found the thread on lkml. I got an almost identical
>>lock up in k3b with a USB external cd/dvd drive recently.
>>My laptop didn't need rebooting (probably since the root
>>fs is one an ide disk).
>>
>>That is a quite large patch that you referenced. I'll
>>try and replicate and report back.
> 
> 
> My guess would be the scsi_lib changes, I would suggest you start there.

Indeed. I'm not sure what I was thinking in
scsi_io_completion(). This small reversion
fixes my k3b problem; tested with a USB external
burner.

Signed-off-by: Douglas Gilbert <dougg@torque.net>