From: Alex Elder <aelder@sgi.com>
Date: Mon, 17 Oct 2011 20:42:02 +0000 (-0500)
Subject: Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux
X-Git-Tag: firefly_0821_release~3680^2~4278^2~2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=9508534c5f170ada5a745cde0df49732718440e9;p=firefly-linux-kernel-4.4.55.git

Merge branch 'master' of git://git./linux/kernel/git/torvalds/linux

Resolved conflicts:
  fs/xfs/xfs_trans_priv.h:
    - deleted struct xfs_ail field xa_flags
    - kept field xa_log_flush in struct xfs_ail
  fs/xfs/xfs_trans_ail.c:
    - in xfsaild_push(), in XFS_ITEM_PUSHBUF case, replaced
      "flush_log = 1" with "ailp->xa_log_flush++"

Signed-off-by: Alex Elder <aelder@sgi.com>
---

9508534c5f170ada5a745cde0df49732718440e9
diff --cc fs/xfs/xfs_trans_ail.c
index 9df7f9f1b5ee,3a1e7ca54c2d..512ff646d01c
--- a/fs/xfs/xfs_trans_ail.c
+++ b/fs/xfs/xfs_trans_ail.c
@@@ -502,22 -496,7 +498,8 @@@ out_done
  	if (!count) {
  		/* We're past our target or empty, so idle */
  		ailp->xa_last_pushed_lsn = 0;
 +		ailp->xa_log_flush = 0;
  
- 		/*
- 		 * We clear the XFS_AIL_PUSHING_BIT first before checking
- 		 * whether the target has changed. If the target has changed,
- 		 * this pushes the requeue race directly onto the result of the
- 		 * atomic test/set bit, so we are guaranteed that either the
- 		 * the pusher that changed the target or ourselves will requeue
- 		 * the work (but not both).
- 		 */
- 		clear_bit(XFS_AIL_PUSHING_BIT, &ailp->xa_flags);
- 		smp_rmb();
- 		if (XFS_LSN_CMP(ailp->xa_target, target) == 0 ||
- 		    test_and_set_bit(XFS_AIL_PUSHING_BIT, &ailp->xa_flags))
- 			return;
- 
  		tout = 50;
  	} else if (XFS_LSN_CMP(lsn, target) >= 0) {
  		/*
@@@ -535,18 -514,35 +517,39 @@@
  		 * were stuck.
  		 *
  		 * Backoff a bit more to allow some I/O to complete before
 -		 * continuing from where we were.
 +		 * restarting from the start of the AIL. This prevents us
 +		 * from spinning on the same items, and if they are pinned will
 +		 * all the restart to issue a log force to unpin the stuck
 +		 * items.
  		 */
  		tout = 20;
 +		ailp->xa_last_pushed_lsn = 0;
  	}
  
- 	/* There is more to do, requeue us.  */
- 	queue_delayed_work(xfs_syncd_wq, &ailp->xa_work,
- 					msecs_to_jiffies(tout));
+ 	return tout;
+ }
+ 
+ static int
+ xfsaild(
+ 	void		*data)
+ {
+ 	struct xfs_ail	*ailp = data;
+ 	long		tout = 0;	/* milliseconds */
+ 
+ 	while (!kthread_should_stop()) {
+ 		if (tout && tout <= 20)
+ 			__set_current_state(TASK_KILLABLE);
+ 		else
+ 			__set_current_state(TASK_INTERRUPTIBLE);
+ 		schedule_timeout(tout ?
+ 				 msecs_to_jiffies(tout) : MAX_SCHEDULE_TIMEOUT);
+ 
+ 		try_to_freeze();
+ 
+ 		tout = xfsaild_push(ailp);
+ 	}
+ 
+ 	return 0;
  }
  
  /*
diff --cc fs/xfs/xfs_trans_priv.h
index 0a6eec6d472a,22750b5e4a8f..44820b9fcb43
--- a/fs/xfs/xfs_trans_priv.h
+++ b/fs/xfs/xfs_trans_priv.h
@@@ -68,14 -69,9 +69,10 @@@ struct xfs_ail 
  	xfs_lsn_t		xa_target;
  	struct list_head	xa_cursors;
  	spinlock_t		xa_lock;
- 	struct delayed_work	xa_work;
  	xfs_lsn_t		xa_last_pushed_lsn;
- 	unsigned long		xa_flags;
 +	int			xa_log_flush;
  };
  
- #define XFS_AIL_PUSHING_BIT	0
- 
  /*
   * From xfs_trans_ail.c
   */