X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Fquota%2Fqmt_internal.h;h=7f02256cd0f45d0a7a10e35c94ee035ed483ef32;hb=a7d8aa2c3bac1ac0662b40ff018cc588e946cee4;hp=ac541b23f8447648796dbc6e78d0f8aa0b164ab0;hpb=294e507d34de0d7990ec507334f71ff1d1a7db01;p=fs%2Flustre-release.git

diff --git a/lustre/quota/qmt_internal.h b/lustre/quota/qmt_internal.h
index ac541b2..7f02256 100644
--- a/lustre/quota/qmt_internal.h
+++ b/lustre/quota/qmt_internal.h
@@ -21,7 +21,7 @@
  * GPL HEADER END
  */
 /*
- * Copyright (c) 2012, Intel Corporation.
+ * Copyright (c) 2012, 2013, Intel Corporation.
  * Use is subject to license terms.
  */
 
@@ -65,19 +65,19 @@ struct qmt_device {
 	 * Once we support quota on non-default pools, then more pools will
 	 * be added to this hash table and pool master setup would have to be
 	 * handled via configuration logs */
-	cfs_hash_t		*qmt_pool_hash;
+	struct cfs_hash		*qmt_pool_hash;
 
 	/* List of pools managed by this master target */
-	cfs_list_t		 qmt_pool_list;
+	struct list_head	 qmt_pool_list;
 
 	/* procfs root directory for this qmt */
-	cfs_proc_dir_entry_t	*qmt_proc;
+	struct proc_dir_entry	*qmt_proc;
 
 	/* dedicated thread in charge of space rebalancing */
 	struct ptlrpc_thread	 qmt_reba_thread;
 
 	/* list of lqe entry which need space rebalancing */
-	cfs_list_t		 qmt_reba_list;
+	struct list_head	 qmt_reba_list;
 
 	/* lock protecting rebalancing list */
 	spinlock_t		 qmt_reba_lock;
@@ -96,10 +96,10 @@ struct qmt_device {
  */
 struct qmt_pool_info {
 	/* link to qmt's pool hash */
-	cfs_hlist_node_t	 qpi_hash;
+	struct hlist_node	 qpi_hash;
 
 	/* chained list of all pools managed by the same qmt */
-	cfs_list_t		 qpi_linkage;
+	struct list_head	 qpi_linkage;
 
 	/* Pool key composed of pool_id | (pool_type << 16)
 	 * Only pool ID 0 is supported for now and the pool type is either
@@ -130,7 +130,7 @@ struct qmt_pool_info {
 	struct lquota_entry	*qpi_grace_lqe[MAXQUOTAS];
 
 	/* procfs root directory for this pool */
-	cfs_proc_dir_entry_t	*qpi_proc;
+	struct proc_dir_entry	*qpi_proc;
 
 	/* pool directory where all indexes related to this pool instance are
 	 * stored */
@@ -139,6 +139,22 @@ struct qmt_pool_info {
 	/* Global quota parameters which apply to all quota type */
 	/* the least value of qunit */
 	unsigned long		 qpi_least_qunit;
+
+	/* Least value of qunit when soft limit is exceeded.
+	 *
+	 * When soft limit is exceeded, qunit will be shrinked to least_qunit
+	 * (1M for block limit), that results in significant write performance
+	 * drop since the client will turn to sync write from now on.
+	 *
+	 * To retain the write performance in an acceptable level, we choose
+	 * to sacrifice grace time accuracy a bit and use a larger least_qunit
+	 * when soft limit is exceeded. It's (qpi_least_qunit * 4) by default,
+	 * and user may enlarge it via procfs to get even better performance
+	 * (with the cost of losing more grace time accuracy).
+	 *
+	 * See qmt_calc_softlimit().
+	 */
+	unsigned long		 qpi_soft_least_qunit;
 };
 
 /*