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Replaced COND_refresh with COND_global_read_lock becasue of a bug in NTPL threads when using different mutexes as arguments to pthread_cond_wait()
The original code caused a hang in FLUSH TABLES WITH READ LOCK in some circumstances because pthread_cond_broadcast() was not delivered to other threads.
This fixes:
Bug#16986: Deadlock condition with MyISAM tables
Bug#20048: FLUSH TABLES WITH READ LOCK causes a deadlock
This commit is contained in:
monty@mysql.com
2006-05-24 17:21:35 +03:00
parent 97b941d924
commit 9e9ca8b6eb
8 changed files with 142 additions and 14 deletions
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16
mysql-test/r/lock_multi.result
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@@ -43,3 +43,19 @@ Field Type Null Key Default Extra
a int(11) YES NULL
unlock tables;
drop table t1;
use mysql;
LOCK TABLES columns_priv WRITE, db WRITE, host WRITE, user WRITE;
FLUSH TABLES;
use mysql;
SELECT user.Select_priv FROM user, db WHERE user.user = db.user LIMIT 1;
OPTIMIZE TABLES columns_priv, db, host, user;
Table Op Msg_type Msg_text
mysql.columns_priv optimize status OK
mysql.db optimize status OK
mysql.host optimize status OK
mysql.user optimize status OK
UNLOCK TABLES;
Select_priv
N
use test;
use test;