On Apr 26, 2011, at 6:17 PM, Bartosz Fabianowski wrote:

>> If you needs per-file private data for cdev, you would be better served
>> by cdevpriv(9) KPI. Cloning is too hard to use correctly for such task.
> 
> Thanks, I just got that working. To help those going down a similar path in 
> the future, I would like to note quickly that the following must be added to 
> the cdevsw structure to ensure proper clean-up:
> 
> .d_flags = D_TRACKCLOSE
> 
> I just spent hours debugging panics until I realized only the last close() 
> was triggering a call to my .d_close method.

Traditional BSD behavior...

Warner

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