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authorChristoph Hellwig <hch@infradead.org>2012-03-13 09:52:35 +0100
committerBen Myers <bpm@sgi.com>2012-03-14 17:09:06 +0100
commit9f920f116426806bfa34c1422742e1bf7b7a2b4b (patch)
tree3ec0a4f006dc10ed56e5bec1b605f5ecbb3a3275 /fs/xfs/xfs_qm.h
parentxfs: per-filesystem dquot LRU lists (diff)
downloadlinux-9f920f116426806bfa34c1422742e1bf7b7a2b4b.tar.xz
linux-9f920f116426806bfa34c1422742e1bf7b7a2b4b.zip
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>
Diffstat (limited to 'fs/xfs/xfs_qm.h')
-rw-r--r--fs/xfs/xfs_qm.h19
1 files changed, 8 insertions, 11 deletions
diff --git a/fs/xfs/xfs_qm.h b/fs/xfs/xfs_qm.h
index c236bba9bfab..8f4b117823cc 100644
--- a/fs/xfs/xfs_qm.h
+++ b/fs/xfs/xfs_qm.h
@@ -31,12 +31,6 @@ extern kmem_zone_t *qm_dqzone;
extern kmem_zone_t *qm_dqtrxzone;
/*
- * Dquot hashtable constants/threshold values.
- */
-#define XFS_QM_HASHSIZE_LOW (PAGE_SIZE / sizeof(xfs_dqhash_t))
-#define XFS_QM_HASHSIZE_HIGH ((PAGE_SIZE * 4) / sizeof(xfs_dqhash_t))
-
-/*
* This defines the unit of allocation of dquots.
* Currently, it is just one file system block, and a 4K blk contains 30
* (136 * 30 = 4080) dquots. It's probably not worth trying to make
@@ -47,15 +41,10 @@ extern kmem_zone_t *qm_dqtrxzone;
*/
#define XFS_DQUOT_CLUSTER_SIZE_FSB (xfs_filblks_t)1
-typedef xfs_dqhash_t xfs_dqlist_t;
-
/*
* Quota Manager (global) structure. Lives only in core.
*/
typedef struct xfs_qm {
- xfs_dqlist_t *qm_usr_dqhtable;/* udquot hash table */
- xfs_dqlist_t *qm_grp_dqhtable;/* gdquot hash table */
- uint qm_dqhashmask; /* # buckets in dq hashtab - 1 */
uint qm_nrefs; /* file systems with quota on */
kmem_zone_t *qm_dqzone; /* dquot mem-alloc zone */
kmem_zone_t *qm_dqtrxzone; /* t_dqinfo of transactions */
@@ -66,6 +55,9 @@ typedef struct xfs_qm {
* The mount structure keeps a pointer to this.
*/
typedef struct xfs_quotainfo {
+ struct radix_tree_root qi_uquota_tree;
+ struct radix_tree_root qi_gquota_tree;
+ struct mutex qi_tree_lock;
xfs_inode_t *qi_uquotaip; /* user quota inode */
xfs_inode_t *qi_gquotaip; /* group quota inode */
struct list_head qi_lru_list;
@@ -94,6 +86,11 @@ typedef struct xfs_quotainfo {
struct shrinker qi_shrinker;
} xfs_quotainfo_t;
+#define XFS_DQUOT_TREE(qi, type) \
+ ((type & XFS_DQ_USER) ? \
+ &((qi)->qi_uquota_tree) : \
+ &((qi)->qi_gquota_tree))
+
extern void xfs_trans_mod_dquot(xfs_trans_t *, xfs_dquot_t *, uint, long);
extern int xfs_trans_reserve_quota_bydquots(xfs_trans_t *, xfs_mount_t *,