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This is an automatically generated e-mail. To reply, visit:
<a href="https://reviewboard.asterisk.org/r/1166/">https://reviewboard.asterisk.org/r/1166/</a>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">The approach of this patch is just wrong. This review should simply be closed. See https://reviewboard.asterisk.org/r/1313/ for a better patch to the hint deadlock.</pre>
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<p>- rmudgett</p>
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<p>On April 13th, 2011, 1:29 p.m., irroot wrote:</p>
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<div>Review request for Asterisk Developers, Russell Bryant and Brett Bryant.</div>
<div>By irroot.</div>
<p style="color: grey;"><i>Updated April 13, 2011, 1:29 p.m.</i></p>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Can some one give me a good reason why the bellow order should not be reversed ??
ao2_callback runs on various threads holding container locks we must make sure we
lock the element before locking a container i have a feeling asterisk could be riddled
with these deadlocks / race conditions ....
/* disclaimer the first lock output is from a patched app_directed_pickup
*
* the changes use a callback the same as features.c
*
*/
=======================================================================
=== Currently Held Locks ==============================================
=======================================================================
===
=== <pending> <lock#> (<file>): <lock type> <line num> <function> <lock name> <lock addr> (times locked)
===
=== Thread ID: 0xab37bb70 (pbx_thread started at [ 5038] pbx.c ast_pbx_start())
=== ---> Lock #0 (channel.c): MUTEX 6241 ast_do_masquerade channels 0x89de1d0 (1)
=== ---> Waiting for Lock #1 (channel.c): MUTEX 6244 ast_do_masquerade original 0x92fa3a8 (1)
=== --- ---> Locked Here: app_directed_pickup.c line 322 (pickup_by_group)
=== -------------------------------------------------------------------
===
=== Thread ID: 0xab597b70 (pbx_thread started at [ 5038] pbx.c ast_pbx_start())
=== ---> Waiting for Lock #0 (app_directed_pickup.c): MUTEX 155 pickup_do target 0x92fa3a8 (1)
=== --- ---> Locked Here: app_directed_pickup.c line 322 (pickup_by_group)
=== -------------------------------------------------------------------
===
=== Thread ID: 0xab04bb70 (pbx_thread started at [ 5038] pbx.c ast_pbx_start())
=== ---> Lock #0 (app_directed_pickup.c): MUTEX 322 pickup_by_group target 0x92fa3a8 (1)
=== ---> Lock #1 (cdr.c): RDLOCK 1142 post_cdr &(&be_list)->lock 0x81f1cc8 (1)
=== ---> Waiting for Lock #2 (astobj2.c): MUTEX 657 internal_ao2_callback c 0x89de1d0 (1)
=== --- ---> Locked Here: channel.c line 6241 (ast_do_masquerade)
=== -------------------------------------------------------------------
=======================================================================
=======================================================================
=== Currently Held Locks ==============================================
=======================================================================
===
=== <pending> <lock#> (<file>): <lock type> <line num> <function> <lock name> <lock addr> (times locked)
===
=== Thread ID: 0xb3c41b70 (tps_processing_function started at [ 451] taskprocessor.c ast_taskprocessor_get())
=== ---> Lock #0 (pbx.c): MUTEX 4269 handle_statechange hints 0x97a4b48 (1)
=== ---> Waiting for Lock #1 (pbx.c): MUTEX 4270 handle_statechange hint 0xb04cf7c0 (1)
=== --- ---> Locked Here: pbx.c line 4523 (ast_remove_hint)
=== -------------------------------------------------------------------
===
=== Thread ID: 0xb09f6b70 (do_monitor started at [24621] chan_sip.c restart_monitor())
=== ---> Lock #0 (chan_sip.c): MUTEX 24119 handle_request_do &netlock 0xb309fdc0 (1)
=== ---> Lock #1 (chan_sip.c): MUTEX 7593 find_call p 0xffb8d48 (1)
=== ---> Waiting for Lock #2 (astobj2.c): MUTEX 657 internal_ao2_callback c 0x97a4b48 (1)
=== --- ---> Locked Here: pbx.c line 4269 (handle_statechange)
=== -------------------------------------------------------------------
===
=== Thread ID: 0xb05c3b70 (netconsole started at [ 1344] asterisk.c listener())
=== ---> Lock #0 (loader.c): MUTEX 673 ast_module_reload &reloadlock 0x81f5280 (1)
=== ---> Lock #1 (loader.c): MUTEX 711 ast_module_reload &(&module_list)->lock 0x81f5208 (1)
=== ---> Lock #2 (pbx.c): MUTEX 4523 ast_remove_hint hint 0xb04cf7c0 (1)
=== ---> Waiting for Lock #3 (astobj2.c): MUTEX 657 internal_ao2_callback c 0x97a4b48 (1)
=== --- ---> Locked Here: pbx.c line 4269 (handle_statechange)
=== -------------------------------------------------------------------
===
=======================================================================
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Ok this makes things a little more intresting need some more work
=======================================================================
=== Currently Held Locks ==============================================
=======================================================================
===
=== <pending> <lock#> (<file>): <lock type> <line num> <function> <lock name> <lock addr> (times locked)
===
=== Thread ID: 0xabd35b70 (do_monitor started at [24621] chan_sip.c restart_monitor())
=== ---> Lock #0 (chan_sip.c): MUTEX 24119 handle_request_do &netlock 0xb30f3dc0 (1)
=== ---> Lock #1 (channel.c): MUTEX 6233 ast_do_masquerade original 0xab409a30 (1)
=== ---> Waiting for Lock #2 (channel.c): MUTEX 6254 ast_do_masquerade channels 0xa1d31c0 (1)
=== --- ---> Locked Here: channel.c line 6254 (ast_do_masquerade)
=== -------------------------------------------------------------------
===
=== Thread ID: 0xaab97b70 (pbx_thread started at [ 5038] pbx.c ast_pbx_start())
=== ---> Lock #0 (channel.c): MUTEX 6254 ast_do_masquerade channels 0xa1d31c0 (1)
=== ---> Waiting for Lock #1 (channel.c): MUTEX 6233 ast_do_masquerade original 0xab409a30 (1)
=== --- ---> Locked Here: channel.c line 6233 (ast_do_masquerade)
=== -------------------------------------------------------------------
=======================================================================</pre>
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<div style="margin-top: 1.5em;">
<b style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Bugs: </b>
<a href="https://issues.asterisk.org/jira/browse/18654">18654</a>,
<a href="https://issues.asterisk.org/jira/browse/19091">19091</a>
</div>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
<ul style="margin-left: 3em; padding-left: 0;">
<li>/branches/1.8/channels/chan_sip.c <span style="color: grey">(313524)</span></li>
<li>/branches/1.8/main/channel.c <span style="color: grey">(313524)</span></li>
<li>/branches/1.8/main/pbx.c <span style="color: grey">(313524)</span></li>
</ul>
<p><a href="https://reviewboard.asterisk.org/r/1166/diff/" style="margin-left: 3em;">View Diff</a></p>
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