[asterisk-dev] [Code Review] Convert device state callbacks to ao2 objects to fix a deadlock.

[Jeff Peeler]

> On 2011-01-10 03:42:31, schmidts wrote:
> > /branches/1.6.2/main/pbx.c, line 4129
> > <https://reviewboard.asterisk.org/r/1072/diff/1/?file=14863#file14863line4129>
> >
> >     Didnt we need a destroy function for hints to clear and remove the callback container when a hint is destroyed?

Unless I'm mistaken I took care of this in ast_remove_hint.


- Jeff


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On 2011-01-07 15:06:45, Jeff Peeler wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> https://reviewboard.asterisk.org/r/1072/
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> 
> (Updated 2011-01-07 15:06:45)
> 
> 
> Review request for Asterisk Developers.
> 
> 
> Summary
> -------
> 
> Lock scenario:
> Thread 1
>  holds ast_rdlock_contexts &conlock
>  holds handle_statechange hints
>  holds handle_statechange hint
>   waiting for cb_extensionstate
>    Locked Here: chan_sip.c line 7428 (find_call)
> Thread 2
>  holds handle_request_do &netlock
>  holds find_call sip_pvt_ptr
>   waiting for ast_rdlock_contexts &conlock
>    Locked Here: pbx.c line 9911 (ast_rdlock_contexts)
> 
> Chan_sip has an established locking order of locking the sip_pvt and then getting the context lock. So the as stated by the summary, the operations in thread 2 have been modified to no longer require the context lock.
> 
> 
> This addresses bug 18310.
>     https://issues.asterisk.org/view.php?id=18310
> 
> 
> Diffs
> -----
> 
>   /branches/1.6.2/main/pbx.c 301088 
> 
> Diff: https://reviewboard.asterisk.org/r/1072/diff
> 
> 
> Testing
> -------
> 
> one47 has reported on the issue that it has been going well so far (for 18 hours):
> https://issues.asterisk.org/view.php?id=18310#130297
> 
> 
> Thanks,
> 
> Jeff
> 
>

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