[XFS] Remove the xlog_ticket allocator

The ticket allocator is just a simple slab implementation internal to the
log. It requires the icloglock to be held when manipulating it and this
contributes to contention on that lock.

Just kill the entire allocator and use a memory zone instead. While there,
allow us to gracefully fail allocation with ENOMEM.

SGI-PV: 978729
SGI-Modid: xfs-linux-melb:xfs-kern:30771a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>

1 files changed, 7 insertions, 5 deletions

diff --git a/fs/xfs/xfs_vfsops.c b/fs/xfs/xfs_vfsops.c
index c21e4d168297..ea94593b5313 100644
--- a/fs/xfs/xfs_vfsops.c
+++ b/fs/xfs/xfs_vfsops.c
@@ -69,15 +69,17 @@ xfs_init(void)
         /*
          * Initialize all of the zone allocators we use.
          */
+        xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t),
+                                                "xfs_log_ticket");
         xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
-                                                 "xfs_bmap_free_item");
+                                                "xfs_bmap_free_item");
         xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
-                                            "xfs_btree_cur");
-        xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
-        xfs_da_state_zone =
-                kmem_zone_init(sizeof(xfs_da_state_t), "xfs_da_state");
+                                                "xfs_btree_cur");
+        xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t),
+                                                "xfs_da_state");
         xfs_dabuf_zone = kmem_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf");
         xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
+        xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
         xfs_acl_zone_init(xfs_acl_zone, "xfs_acl");
         xfs_mru_cache_init();
         xfs_filestream_init();