1 files changed, 26 insertions, 23 deletions

diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 68415cb4f23..34798f391c4 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -1914,6 +1914,11 @@ xfs_iunlink_remove(
         return 0;
 }
 
+/*
+ * A big issue when freeing the inode cluster is is that we _cannot_ skip any
+ * inodes that are in memory - they all must be marked stale and attached to
+ * the cluster buffer.
+ */
 STATIC void
 xfs_ifree_cluster(
         xfs_inode_t     *free_ip,
@@ -1945,8 +1950,6 @@ xfs_ifree_cluster(
         }
 
         for (j = 0; j < nbufs; j++, inum += ninodes) {
-                int     found = 0;
-
                 blkno = XFS_AGB_TO_DADDR(mp, XFS_INO_TO_AGNO(mp, inum),
                                          XFS_INO_TO_AGBNO(mp, inum));
 
@@ -1965,7 +1968,9 @@ xfs_ifree_cluster(
                 /*
                  * Walk the inodes already attached to the buffer and mark them
                  * stale. These will all have the flush locks held, so an
-                 * in-memory inode walk can't lock them.
+                 * in-memory inode walk can't lock them. By marking them all
+                 * stale first, we will not attempt to lock them in the loop
+                 * below as the XFS_ISTALE flag will be set.
                  */
                 lip = XFS_BUF_FSPRIVATE(bp, xfs_log_item_t *);
                 while (lip) {
@@ -1977,11 +1982,11 @@ xfs_ifree_cluster(
                                                         &iip->ili_flush_lsn,
                                                         &iip->ili_item.li_lsn);
                                 xfs_iflags_set(iip->ili_inode, XFS_ISTALE);
-                                found++;
                         }
                         lip = lip->li_bio_list;
                 }
 
+
                 /*
                  * For each inode in memory attempt to add it to the inode
                  * buffer and set it up for being staled on buffer IO
@@ -1993,6 +1998,7 @@ xfs_ifree_cluster(
                  * even trying to lock them.
                  */
                 for (i = 0; i < ninodes; i++) {
+retry:
                         read_lock(&pag->pag_ici_lock);
                         ip = radix_tree_lookup(&pag->pag_ici_root,
                                         XFS_INO_TO_AGINO(mp, (inum + i)));
@@ -2003,38 +2009,36 @@ xfs_ifree_cluster(
                                 continue;
                         }
 
-                        /* don't try to lock/unlock the current inode */
+                        /*
+                         * Don't try to lock/unlock the current inode, but we
+                         * _cannot_ skip the other inodes that we did not find
+                         * in the list attached to the buffer and are not
+                         * already marked stale. If we can't lock it, back off
+                         * and retry.
+                         */
                         if (ip != free_ip &&
                             !xfs_ilock_nowait(ip, XFS_ILOCK_EXCL)) {
                                 read_unlock(&pag->pag_ici_lock);
-                                continue;
+                                delay(1);
+                                goto retry;
                         }
                         read_unlock(&pag->pag_ici_lock);
 
-                        if (!xfs_iflock_nowait(ip)) {
-                                if (ip != free_ip)
-                                        xfs_iunlock(ip, XFS_ILOCK_EXCL);
-                                continue;
-                        }
-
+                        xfs_iflock(ip);
                         xfs_iflags_set(ip, XFS_ISTALE);
-                        if (xfs_inode_clean(ip)) {
-                                ASSERT(ip != free_ip);
-                                xfs_ifunlock(ip);
-                                xfs_iunlock(ip, XFS_ILOCK_EXCL);
-                                continue;
-                        }
 
+                        /*
+                         * we don't need to attach clean inodes or those only
+                         * with unlogged changes (which we throw away, anyway).
+                         */
                         iip = ip->i_itemp;
-                        if (!iip) {
-                                /* inode with unlogged changes only */
+                        if (!iip || xfs_inode_clean(ip)) {
                                 ASSERT(ip != free_ip);
                                 ip->i_update_core = 0;
                                 xfs_ifunlock(ip);
                                 xfs_iunlock(ip, XFS_ILOCK_EXCL);
                                 continue;
                         }
-                        found++;
 
                         iip->ili_last_fields = iip->ili_format.ilf_fields;
                         iip->ili_format.ilf_fields = 0;
@@ -2049,8 +2053,7 @@ xfs_ifree_cluster(
                                 xfs_iunlock(ip, XFS_ILOCK_EXCL);
                 }
 
-                if (found)
-                        xfs_trans_stale_inode_buf(tp, bp);
+                xfs_trans_stale_inode_buf(tp, bp);
                 xfs_trans_binval(tp, bp);
         }