Merge branch 'linus' into tracing/core

Merge reason: tracing/core was on a .30-rc1 base and was missing out on
              on a handful of tracing fixes present in .30-rc5-almost.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 33 insertions, 45 deletions

diff --git a/fs/xfs/linux-2.6/xfs_sync.c b/fs/xfs/linux-2.6/xfs_sync.c
index a608e72fa405..f7ba76633c29 100644
--- a/fs/xfs/linux-2.6/xfs_sync.c
+++ b/fs/xfs/linux-2.6/xfs_sync.c
@@ -62,12 +62,6 @@ xfs_sync_inodes_ag(
         uint32_t        first_index = 0;
         int             error = 0;
         int             last_error = 0;
-        int             fflag = XFS_B_ASYNC;
-
-        if (flags & SYNC_DELWRI)
-                fflag = XFS_B_DELWRI;
-        if (flags & SYNC_WAIT)
-                fflag = 0;              /* synchronous overrides all */
 
         do {
                 struct inode    *inode;
@@ -128,11 +122,23 @@ xfs_sync_inodes_ag(
                  * If we have to flush data or wait for I/O completion
                  * we need to hold the iolock.
                  */
-                if ((flags & SYNC_DELWRI) && VN_DIRTY(inode)) {
-                        xfs_ilock(ip, XFS_IOLOCK_SHARED);
-                        lock_flags |= XFS_IOLOCK_SHARED;
-                        error = xfs_flush_pages(ip, 0, -1, fflag, FI_NONE);
-                        if (flags & SYNC_IOWAIT)
+                if (flags & SYNC_DELWRI) {
+                        if (VN_DIRTY(inode)) {
+                                if (flags & SYNC_TRYLOCK) {
+                                        if (xfs_ilock_nowait(ip, XFS_IOLOCK_SHARED))
+                                                lock_flags |= XFS_IOLOCK_SHARED;
+                                } else {
+                                        xfs_ilock(ip, XFS_IOLOCK_SHARED);
+                                        lock_flags |= XFS_IOLOCK_SHARED;
+                                }
+                                if (lock_flags & XFS_IOLOCK_SHARED) {
+                                        error = xfs_flush_pages(ip, 0, -1,
+                                                        (flags & SYNC_WAIT) ? 0
+                                                                : XFS_B_ASYNC,
+                                                        FI_NONE);
+                                }
+                        }
+                        if (VN_CACHED(inode) && (flags & SYNC_IOWAIT))
                                 xfs_ioend_wait(ip);
                 }
                 xfs_ilock(ip, XFS_ILOCK_SHARED);
@@ -398,15 +404,17 @@ STATIC void
 xfs_syncd_queue_work(
         struct xfs_mount *mp,
         void            *data,
-        void            (*syncer)(struct xfs_mount *, void *))
+        void            (*syncer)(struct xfs_mount *, void *),
+        struct completion *completion)
 {
-        struct bhv_vfs_sync_work *work;
+        struct xfs_sync_work *work;
 
-        work = kmem_alloc(sizeof(struct bhv_vfs_sync_work), KM_SLEEP);
+        work = kmem_alloc(sizeof(struct xfs_sync_work), KM_SLEEP);
         INIT_LIST_HEAD(&work->w_list);
         work->w_syncer = syncer;
         work->w_data = data;
         work->w_mount = mp;
+        work->w_completion = completion;
         spin_lock(&mp->m_sync_lock);
         list_add_tail(&work->w_list, &mp->m_sync_list);
         spin_unlock(&mp->m_sync_lock);
@@ -420,49 +428,26 @@ xfs_syncd_queue_work(
  * heads, looking about for more room...
  */
 STATIC void
-xfs_flush_inode_work(
-        struct xfs_mount *mp,
-        void            *arg)
-{
-        struct inode    *inode = arg;
-        filemap_flush(inode->i_mapping);
-        iput(inode);
-}
-
-void
-xfs_flush_inode(
-        xfs_inode_t     *ip)
-{
-        struct inode    *inode = VFS_I(ip);
-
-        igrab(inode);
-        xfs_syncd_queue_work(ip->i_mount, inode, xfs_flush_inode_work);
-        delay(msecs_to_jiffies(500));
-}
-
-/*
- * This is the "bigger hammer" version of xfs_flush_inode_work...
- * (IOW, "If at first you don't succeed, use a Bigger Hammer").
- */
-STATIC void
-xfs_flush_device_work(
+xfs_flush_inodes_work(
         struct xfs_mount *mp,
         void            *arg)
 {
         struct inode    *inode = arg;
-        sync_blockdev(mp->m_super->s_bdev);
+        xfs_sync_inodes(mp, SYNC_DELWRI | SYNC_TRYLOCK);
+        xfs_sync_inodes(mp, SYNC_DELWRI | SYNC_TRYLOCK | SYNC_IOWAIT);
         iput(inode);
 }
 
 void
-xfs_flush_device(
+xfs_flush_inodes(
         xfs_inode_t     *ip)
 {
         struct inode    *inode = VFS_I(ip);
+        DECLARE_COMPLETION_ONSTACK(completion);
 
         igrab(inode);
-        xfs_syncd_queue_work(ip->i_mount, inode, xfs_flush_device_work);
-        delay(msecs_to_jiffies(500));
+        xfs_syncd_queue_work(ip->i_mount, inode, xfs_flush_inodes_work, &completion);
+        wait_for_completion(&completion);
         xfs_log_force(ip->i_mount, (xfs_lsn_t)0, XFS_LOG_FORCE|XFS_LOG_SYNC);
 }
 
@@ -497,7 +482,7 @@ xfssyncd(
 {
         struct xfs_mount        *mp = arg;
         long                    timeleft;
-        bhv_vfs_sync_work_t     *work, *n;
+        xfs_sync_work_t         *work, *n;
         LIST_HEAD               (tmp);
 
         set_freezable();
@@ -532,6 +517,8 @@ xfssyncd(
                         list_del(&work->w_list);
                         if (work == &mp->m_sync_work)
                                 continue;
+                        if (work->w_completion)
+                                complete(work->w_completion);
                         kmem_free(work);
                 }
         }
@@ -545,6 +532,7 @@ xfs_syncd_init(
 {
         mp->m_sync_work.w_syncer = xfs_sync_worker;
         mp->m_sync_work.w_mount = mp;
+        mp->m_sync_work.w_completion = NULL;
         mp->m_sync_task = kthread_run(xfssyncd, mp, "xfssyncd");
         if (IS_ERR(mp->m_sync_task))
                 return -PTR_ERR(mp->m_sync_task);