xfs: force buffer writeback before blocking on the ilock in inode reclaim

[pandora-kernel.git] / fs / xfs / xfs_inode.c

diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index c0237c6..755ee81 100644 (file)
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -2835,6 +2835,27 @@ corrupt_out:
        return XFS_ERROR(EFSCORRUPTED);
 }
 
+void
+xfs_promote_inode(
+       struct xfs_inode        *ip)
+{
+       struct xfs_buf          *bp;
+
+       ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
+
+       bp = xfs_incore(ip->i_mount->m_ddev_targp, ip->i_imap.im_blkno,
+                       ip->i_imap.im_len, XBF_TRYLOCK);
+       if (!bp)
+               return;
+
+       if (XFS_BUF_ISDELAYWRITE(bp)) {
+               xfs_buf_delwri_promote(bp);
+               wake_up_process(ip->i_mount->m_ddev_targp->bt_task);
+       }
+
+       xfs_buf_relse(bp);
+}
+
 /*
  * Return a pointer to the extent record at file index idx.
  */