Many files:

  Fix hang introduced by selective deadlock resolution
srv0srv.c, row0mysql.c:
  Fix hang introduced by selective deadlock resolution + corruption caused by lock timeout or sel deadl res in ON DELETE CASCADE


innobase/include/que0que.h:
  Fix hang introduced by selective deadlock resolution
innobase/include/trx0trx.h:
  Fix hang introduced by selective deadlock resolution
innobase/include/ut0ut.h:
  Fix hang introduced by selective deadlock resolution
innobase/lock/lock0lock.c:
  Fix hang introduced by selective deadlock resolution
innobase/log/log0log.c:
  Fix hang introduced by selective deadlock resolution
innobase/que/que0que.c:
  Fix hang introduced by selective deadlock resolution
innobase/row/row0mysql.c:
  Fix hang introduced by selective deadlock resolution + corruption caused by lock timeout or sel deadl res in ON DELETE CASCADE
innobase/srv/srv0srv.c:
  Fix hang introduced by selective deadlock resolution + corruption caused by lock timeout or sel deadl res in ON DELETE CASCADE
innobase/trx/trx0sys.c:
  Fix hang introduced by selective deadlock resolution
innobase/trx/trx0trx.c:
  Fix hang introduced by selective deadlock resolution

3 files changed, 16 insertions, 4 deletions

diff --git a/innobase/include/que0que.h b/innobase/include/que0que.h
index cdaeeae1fde..a3ed18e2b14 100644
--- a/innobase/include/que0que.h
+++ b/innobase/include/que0que.h
@@ -117,6 +117,7 @@ que_thr_stop(
 /**************************************************************************
 Moves a thread from another state to the QUE_THR_RUNNING state. Increments
 the n_active_thrs counters of the query graph and transaction. */
+
 void
 que_thr_move_to_run_state_for_mysql(
 /*================================*/
@@ -125,14 +126,17 @@ que_thr_move_to_run_state_for_mysql(
 /**************************************************************************
 A patch for MySQL used to 'stop' a dummy query thread used in MySQL
 select, when there is no error or lock wait. */
+
 void
 que_thr_stop_for_mysql_no_error(
 /*============================*/
 	que_thr_t*	thr,	/* in: query thread */
 	trx_t*		trx);	/* in: transaction */
 /**************************************************************************
-A patch for MySQL used to 'stop' a dummy query thread used in MySQL
-select. */
+A patch for MySQL used to 'stop' a dummy query thread used in MySQL. The
+query thread is stopped and made inactive, except in the case where
+it was put to the lock wait state in lock0lock.c, but the lock has already
+been granted or the transaction chosen as a victim in deadlock resolution. */
 
 void
 que_thr_stop_for_mysql(
diff --git a/innobase/include/trx0trx.h b/innobase/include/trx0trx.h
index 1468ef449e7..34f820f03e7 100644
--- a/innobase/include/trx0trx.h
+++ b/innobase/include/trx0trx.h
@@ -429,7 +429,10 @@ struct trx_struct{
 					MySQL */
 	/*------------------------------*/
 	ulint		error_state;	/* 0 if no error, otherwise error
-					number */
+					number; NOTE That ONLY the thread
+					doing the transaction is allowed to
+					set this field: this is NOT protected
+					by the kernel mutex */
 	void*		error_info;	/* if the error number indicates a
 					duplicate key error, a pointer to
 					the problematic index is stored here */
@@ -466,6 +469,12 @@ struct trx_struct{
 					TRX_QUE_LOCK_WAIT, this points to
 					the lock request, otherwise this is
 					NULL */
+	ibool		was_chosen_as_deadlock_victim;
+					/* when the transaction decides to wait
+					for a lock, this it sets this to FALSE;
+					if another transaction chooses this
+					transaction as a victim in deadlock
+					resolution, it sets this to TRUE */
 	time_t          wait_started;   /* lock wait started at this time */
 	UT_LIST_BASE_NODE_T(que_thr_t)
 			wait_thrs;	/* query threads belonging to this
diff --git a/innobase/include/ut0ut.h b/innobase/include/ut0ut.h
index d4697c47266..8ec23b23dcd 100644
--- a/innobase/include/ut0ut.h
+++ b/innobase/include/ut0ut.h
@@ -10,7 +10,6 @@ Created 1/20/1994 Heikki Tuuri
 #define ut0ut_h
 
 #include "univ.i"
-#include <string.h>
 #include <time.h>
 #ifndef MYSQL_SERVER
 #include <ctype.h>