Pull sem2mutex-ioc4 into release branch

[linux-2.6-omap-h63xx.git] / fs / jfs / jfs_logmgr.c

diff --git a/fs/jfs/jfs_logmgr.c b/fs/jfs/jfs_logmgr.c
index 7c8387ed4192be68cd090956e430cf12eb5ac936..d27bac6acaa346118b39bb02517987130b5cdcfb 100644 (file)
--- a/fs/jfs/jfs_logmgr.c
+++ b/fs/jfs/jfs_logmgr.c
@@ -191,7 +191,7 @@ static int lbmIOWait(struct lbuf * bp, int flag);
 static bio_end_io_t lbmIODone;
 static void lbmStartIO(struct lbuf * bp);
 static void lmGCwrite(struct jfs_log * log, int cant_block);
-static int lmLogSync(struct jfs_log * log, int nosyncwait);
+static int lmLogSync(struct jfs_log * log, int hard_sync);
 
 
 
@@ -915,19 +915,17 @@ static void lmPostGC(struct lbuf * bp)
  *     if new sync address is available
  *     (normally the case if sync() is executed by back-ground
  *     process).
- *     if not, explicitly run jfs_blogsync() to initiate
- *     getting of new sync address.
  *     calculate new value of i_nextsync which determines when
  *     this code is called again.
  *
  * PARAMETERS: log     - log structure
- *             nosyncwait - 1 if called asynchronously
+ *             hard_sync - 1 to force all metadata to be written
  *
  * RETURN:     0
  *                     
  * serialization: LOG_LOCK() held on entry/exit
  */
-static int lmLogSync(struct jfs_log * log, int nosyncwait)
+static int lmLogSync(struct jfs_log * log, int hard_sync)
 {
        int logsize;
        int written;            /* written since last syncpt */
@@ -941,11 +939,18 @@ static int lmLogSync(struct jfs_log * log, int nosyncwait)
        unsigned long flags;
 
        /* push dirty metapages out to disk */
-       list_for_each_entry(sbi, &log->sb_list, log_list) {
-               filemap_flush(sbi->ipbmap->i_mapping);
-               filemap_flush(sbi->ipimap->i_mapping);
-               filemap_flush(sbi->direct_inode->i_mapping);
-       }
+       if (hard_sync)
+               list_for_each_entry(sbi, &log->sb_list, log_list) {
+                       filemap_fdatawrite(sbi->ipbmap->i_mapping);
+                       filemap_fdatawrite(sbi->ipimap->i_mapping);
+                       filemap_fdatawrite(sbi->direct_inode->i_mapping);
+               }
+       else
+               list_for_each_entry(sbi, &log->sb_list, log_list) {
+                       filemap_flush(sbi->ipbmap->i_mapping);
+                       filemap_flush(sbi->ipimap->i_mapping);
+                       filemap_flush(sbi->direct_inode->i_mapping);
+               }
 
        /*
         *      forward syncpt
@@ -1021,16 +1026,13 @@ static int lmLogSync(struct jfs_log * log, int nosyncwait)
                /* next syncpt trigger = written + more */
                log->nextsync = written + more;
 
-       /* return if lmLogSync() from outside of transaction, e.g., sync() */
-       if (nosyncwait)
-               return lsn;
-
        /* if number of bytes written from last sync point is more
         * than 1/4 of the log size, stop new transactions from
         * starting until all current transactions are completed
         * by setting syncbarrier flag.
         */
-       if (written > LOGSYNC_BARRIER(logsize) && logsize > 32 * LOGPSIZE) {
+       if (!test_bit(log_SYNCBARRIER, &log->flag) &&
+           (written > LOGSYNC_BARRIER(logsize)) && log->active) {
                set_bit(log_SYNCBARRIER, &log->flag);
                jfs_info("log barrier on: lsn=0x%x syncpt=0x%x", lsn,
                         log->syncpt);
@@ -1048,11 +1050,12 @@ static int lmLogSync(struct jfs_log * log, int nosyncwait)
  *
  * FUNCTION:   write log SYNCPT record for specified log
  *
- * PARAMETERS: log     - log structure
+ * PARAMETERS: log       - log structure
+ *             hard_sync - set to 1 to force metadata to be written
  */
-void jfs_syncpt(struct jfs_log *log)
+void jfs_syncpt(struct jfs_log *log, int hard_sync)
 {      LOG_LOCK(log);
-       lmLogSync(log, 1);
+       lmLogSync(log, hard_sync);
        LOG_UNLOCK(log);
 }
 
@@ -2359,9 +2362,9 @@ int jfsIOWait(void *arg)
                        lbmStartIO(bp);
                        spin_lock_irq(&log_redrive_lock);
                }
-               if (current->flags & PF_FREEZE) {
+               if (freezing(current)) {
                        spin_unlock_irq(&log_redrive_lock);
-                       refrigerator(PF_FREEZE);
+                       refrigerator();
                } else {
                        add_wait_queue(&jfs_IO_thread_wait, &wq);
                        set_current_state(TASK_INTERRUPTIBLE);