xfs: Inode create log items

Introduce the inode create log item type for logical inode create logging.
Instead of logging the changes in buffers, pass the range to be
initialised through the log by a new transaction type.  This reduces
the amount of log space required to record initialisation during
allocation from about 128 bytes per inode to a small fixed amount
per inode extent to be initialised.

This requires a new log item type to track it through the log
and the AIL. This is a relatively simple item - most callbacks are
noops as this item has the same life cycle as the transaction.

Signed-off-by: Dave Chinner <david@fromorbit.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 14924099bcb8..30ef68f8a390 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -51,6 +51,7 @@
 #include "xfs_inode_item.h"
 #include "xfs_icache.h"
 #include "xfs_trace.h"
+#include "xfs_icreate_item.h"
 
 #include <linux/namei.h>
 #include <linux/init.h>
@@ -1650,9 +1651,15 @@ xfs_init_zones(void)
                                         KM_ZONE_SPREAD, NULL);
         if (!xfs_ili_zone)
                 goto out_destroy_inode_zone;
+        xfs_icreate_zone = kmem_zone_init(sizeof(struct xfs_icreate_item),
+                                        "xfs_icr");
+        if (!xfs_icreate_zone)
+                goto out_destroy_ili_zone;
 
         return 0;
 
+ out_destroy_ili_zone:
+        kmem_zone_destroy(xfs_ili_zone);
  out_destroy_inode_zone:
         kmem_zone_destroy(xfs_inode_zone);
  out_destroy_efi_zone:
@@ -1691,6 +1698,7 @@ xfs_destroy_zones(void)
          * destroy caches.
          */
         rcu_barrier();
+        kmem_zone_destroy(xfs_icreate_zone);
         kmem_zone_destroy(xfs_ili_zone);
         kmem_zone_destroy(xfs_inode_zone);
         kmem_zone_destroy(xfs_efi_zone);