xfs: Improve scalability of busy extent tracking

[deliverable/linux.git] / fs / xfs / xfs_trans.h

diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h
index c62beee0921ea102e1c6ba27869fd93f062e3c65..ff7e9e6eee844318e68c1559e07f0acda4c01b76 100644 (file)
--- a/fs/xfs/xfs_trans.h
+++ b/fs/xfs/xfs_trans.h
@@ -813,6 +813,7 @@ struct xfs_log_item_desc;
 struct xfs_mount;
 struct xfs_trans;
 struct xfs_dquot_acct;
+struct xfs_busy_extent;
 
 typedef struct xfs_log_item {
        struct list_head                li_ail;         /* AIL pointers */
@@ -871,34 +872,6 @@ typedef struct xfs_item_ops {
 #define        XFS_ITEM_LOCKED         2
 #define XFS_ITEM_PUSHBUF       3
 
-/*
- * This structure is used to maintain a list of block ranges that have been
- * freed in the transaction.  The ranges are listed in the perag[] busy list
- * between when they're freed and the transaction is committed to disk.
- */
-
-typedef struct xfs_log_busy_slot {
-       xfs_agnumber_t          lbc_ag;
-       ushort                  lbc_idx;        /* index in perag.busy[] */
-} xfs_log_busy_slot_t;
-
-#define XFS_LBC_NUM_SLOTS      31
-typedef struct xfs_log_busy_chunk {
-       struct xfs_log_busy_chunk       *lbc_next;
-       uint                            lbc_free;       /* free slots bitmask */
-       ushort                          lbc_unused;     /* first unused */
-       xfs_log_busy_slot_t             lbc_busy[XFS_LBC_NUM_SLOTS];
-} xfs_log_busy_chunk_t;
-
-#define        XFS_LBC_MAX_SLOT        (XFS_LBC_NUM_SLOTS - 1)
-#define        XFS_LBC_FREEMASK        ((1U << XFS_LBC_NUM_SLOTS) - 1)
-
-#define        XFS_LBC_INIT(cp)        ((cp)->lbc_free = XFS_LBC_FREEMASK)
-#define        XFS_LBC_CLAIM(cp, slot) ((cp)->lbc_free &= ~(1 << (slot)))
-#define        XFS_LBC_SLOT(cp, slot)  (&((cp)->lbc_busy[(slot)]))
-#define        XFS_LBC_VACANCY(cp)     (((cp)->lbc_free) & XFS_LBC_FREEMASK)
-#define        XFS_LBC_ISFREE(cp, slot) ((cp)->lbc_free & (1 << (slot)))
-
 /*
  * This is the type of function which can be given to xfs_trans_callback()
  * to be called upon the transaction's commit to disk.
@@ -950,8 +923,7 @@ typedef struct xfs_trans {
        unsigned int            t_items_free;   /* log item descs free */
        xfs_log_item_chunk_t    t_items;        /* first log item desc chunk */
        xfs_trans_header_t      t_header;       /* header for in-log trans */
-       unsigned int            t_busy_free;    /* busy descs free */
-       xfs_log_busy_chunk_t    t_busy;         /* busy/async free blocks */
+       struct list_head        t_busy;         /* list of busy extents */
        unsigned long           t_pflags;       /* saved process flags state */
 } xfs_trans_t;
 
@@ -1025,9 +997,6 @@ int                _xfs_trans_commit(xfs_trans_t *,
 void           xfs_trans_cancel(xfs_trans_t *, int);
 int            xfs_trans_ail_init(struct xfs_mount *);
 void           xfs_trans_ail_destroy(struct xfs_mount *);
-xfs_log_busy_slot_t *xfs_trans_add_busy(xfs_trans_t *tp,
-                                       xfs_agnumber_t ag,
-                                       xfs_extlen_t idx);
 
 extern kmem_zone_t     *xfs_trans_zone;