[mythtv-commits] Ticket #11066: deadlock in MythSystem

[MythTV]

#11066: deadlock in MythSystem
------------------------------------+----------------------------
 Reporter:  Jack Thomasson <jkt@…>  |          Owner:  wagnerrp
     Type:  Patch - Bug Fix         |         Status:  closed
 Priority:  major                   |      Milestone:  0.26
Component:  MythTV - MythSystem     |        Version:  0.25-fixes
 Severity:  medium                  |     Resolution:  fixed
 Keywords:                          |  Ticket locked:  0
------------------------------------+----------------------------
Changes (by Jack Thomasson <jkt@…>):

 * status:  accepted => closed
 * resolution:   => fixed


Comment:

 In [changeset:b5fbc746115308475100c53c17420234da9a2a10/mythtv]:
 {{{
 #!CommitTicketReference repository="mythtv"
 revision="b5fbc746115308475100c53c17420234da9a2a10"
 Remove potential deadlock on MythSystem IO threads.

 This performs finer grained locking against the file descriptor type map
 in the IO handling mechanisms for MythSystem. If the read thread wakes
 up and has data to process at the exact moment the external thread is
 handing off a newly started child to the manager for handling, the two
 may hit fdLock and MythSystemIOHandler::m_pLock from opposite
 directions, deadlocking both threads.

 Fixes #11066

 Signed-off-by: Raymond Wagner <rwagner at mythtv.org>
 }}}

-- 
Ticket URL: <http://code.mythtv.org/trac/ticket/11066#comment:2>
MythTV <http://code.mythtv.org/trac>
MythTV Media Center