diff options
| author | Dave Kleikamp <shaggy@linux.vnet.ibm.com> | 2007-05-15 22:53:36 -0500 |
|---|---|---|
| committer | Chris Wright <chrisw@sous-sol.org> | 2007-05-23 14:32:54 -0700 |
| commit | 7fe23b5d8557c09a01d5a089878f25d52b5f1c05 (patch) | |
| tree | db27ee0d5a5658f25c116335ae85646f28d1afda | |
| parent | 81166863634472f5fcb45793e6676023d674f17c (diff) | |
[PATCH] JFS: Fix race waking up jfsIO kernel thread
It's possible for a journal I/O request to be added to the log_redrive
queue and the jfsIO thread to be awakened after the thread releases
log_redrive_lock but before it sets its state to TASK_INTERRUPTIBLE.
The jfsIO thread should set the state before giving up the spinlock, so
the waking thread will really wake it.
Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
| -rw-r--r-- | fs/jfs/jfs_logmgr.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/jfs/jfs_logmgr.c b/fs/jfs/jfs_logmgr.c index 5065baa530b6..3760d02a2750 100644 --- a/fs/jfs/jfs_logmgr.c +++ b/fs/jfs/jfs_logmgr.c @@ -2354,12 +2354,13 @@ int jfsIOWait(void *arg) lbmStartIO(bp); spin_lock_irq(&log_redrive_lock); } - spin_unlock_irq(&log_redrive_lock); if (freezing(current)) { + spin_unlock_irq(&log_redrive_lock); refrigerator(); } else { set_current_state(TASK_INTERRUPTIBLE); + spin_unlock_irq(&log_redrive_lock); schedule(); current->state = TASK_RUNNING; } |