xfs: use per-filesystem radix trees for dquot lookup

Replace the global hash tables for looking up in-memory dquot structures
with per-filesystem radix trees to allow scaling to a large number of
in-memory dquot structures.

Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ben Myers <bpm@sgi.com>

1 files changed, 0 insertions, 12 deletions

diff --git a/fs/xfs/xfs_dquot.h b/fs/xfs/xfs_dquot.h
index f291c25e5992..4061f1731271 100644
--- a/fs/xfs/xfs_dquot.h
+++ b/fs/xfs/xfs_dquot.h
@@ -29,16 +29,6 @@
  * when quotas are off.
  */
 
-/*
- * The hash chain headers (hash buckets)
- */
-typedef struct xfs_dqhash {
-        struct list_head  qh_list;
-        struct mutex      qh_lock;
-        uint              qh_version;   /* ever increasing version */
-        uint              qh_nelems;    /* number of dquots on the list */
-} xfs_dqhash_t;
-
 struct xfs_mount;
 struct xfs_trans;
 
@@ -49,8 +39,6 @@ typedef struct xfs_dquot {
         uint             dq_flags;      /* various flags (XFS_DQ_*) */
         struct list_head q_lru;         /* global free list of dquots */
         struct list_head q_mplist;      /* mount's list of dquots */
-        struct list_head q_hashlist;    /* gloabl hash list of dquots */
-        xfs_dqhash_t    *q_hash;        /* the hashchain header */
         struct xfs_mount*q_mount;       /* filesystem this relates to */
         struct xfs_trans*q_transp;      /* trans this belongs to currently */
         uint             q_nrefs;       /* # active refs from inodes */