[openib-general] Re: [PATCH] [RFC] - dapl - dat_ep_free() can return without

[Arlin Davis]

James Lentini wrote:

>On Tue, 4 Apr 2006, Steve Wise wrote:
>
>
>  
>
>>>What happens if a consumer attempts to free the EP from a callback? 
>>>      
>>>
>>There are no direct consumer callbacks in usermode are there?  consumers
>>call dat_evd_wait() or whatever and get scheduled.  Not like kernel
>>mode...  Or am I confused?
>>    
>>
>
>You're right. The DAT consumer thread calling dat_ep_free() will never 
>be a provider (or verbs) thread.
>
>It looks like there needs to be some synchronization around destroying 
>the cm_id with the dapli_thread(), though. 
>
>Could we only delete the QP in dat_ep_free as Sean suggested and leave 
>the cm_id cleanup for later as is being done now?
>
>  
>
I think we should destroy all resources before returning, including the 
cm_id. This will insure that no events will fire with context associated 
with an EP(qp,cm_id,etc) that was just freed.  I will take a look at 
Steve's patch and get back to you.