[asterisk-dev] [Code Review] Remove some unnecessary locking from ast_hangup()

[Russell Bryant]

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https://reviewboard.asterisk.org/r/1712/
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Review request for Asterisk Developers.


Summary
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This patch removes some unnecessary locking of the channels container in ast_hangup().  The reason this came up is that this lock can very quickly block the entire system.  If any of the channel cleanup code decides to block, it causes a problem for the whole system.  For example, when audiohooks get destroyed, if that blocks for a while waiting on the mixmonitor thread to exit because it's busy blocking on some I/O, it causes a problem for many other threads in the meantime.


Diffs
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  /branches/1.8/main/channel.c 353961 

Diff: https://reviewboard.asterisk.org/r/1712/diff


Testing
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Ran under load in a test environment, about 1/2 million calls


Thanks,

Russell

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