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[net-next][PATCH 10/13] RDS: IB: add mr reused stats

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Add MR reuse statistics to RDS IB transport.

Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
---
 net/rds/ib.h       | 2 ++
 net/rds/ib_rdma.c  | 7 ++++++-
 net/rds/ib_stats.c | 2 ++
 3 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/net/rds/ib.h b/net/rds/ib.h
index c88cb22..62fe7d5 100644
--- a/net/rds/ib.h
+++ b/net/rds/ib.h
@@ -259,6 +259,8 @@ struct rds_ib_statistics {
 	uint64_t	s_ib_rdma_mr_1m_pool_flush;
 	uint64_t	s_ib_rdma_mr_1m_pool_wait;
 	uint64_t	s_ib_rdma_mr_1m_pool_depleted;
+	uint64_t	s_ib_rdma_mr_8k_reused;
+	uint64_t	s_ib_rdma_mr_1m_reused;
 	uint64_t	s_ib_atomic_cswp;
 	uint64_t	s_ib_atomic_fadd;
 };
diff --git a/net/rds/ib_rdma.c b/net/rds/ib_rdma.c
index 20ff191..00e9064 100644
--- a/net/rds/ib_rdma.c
+++ b/net/rds/ib_rdma.c
@@ -188,8 +188,13 @@ struct rds_ib_mr *rds_ib_reuse_mr(struct rds_ib_mr_pool *pool)
 	flag = this_cpu_ptr(&clean_list_grace);
 	set_bit(CLEAN_LIST_BUSY_BIT, flag);
 	ret = llist_del_first(&pool->clean_list);
-	if (ret)
+	if (ret) {
 		ibmr = llist_entry(ret, struct rds_ib_mr, llnode);
+		if (pool->pool_type == RDS_IB_MR_8K_POOL)
+			rds_ib_stats_inc(s_ib_rdma_mr_8k_reused);
+		else
+			rds_ib_stats_inc(s_ib_rdma_mr_1m_reused);
+	}
 
 	clear_bit(CLEAN_LIST_BUSY_BIT, flag);
 	preempt_enable();
diff --git a/net/rds/ib_stats.c b/net/rds/ib_stats.c
index d77e044..7e78dca 100644
--- a/net/rds/ib_stats.c
+++ b/net/rds/ib_stats.c
@@ -73,6 +73,8 @@ static const char *const rds_ib_stat_names[] = {
 	"ib_rdma_mr_1m_pool_flush",
 	"ib_rdma_mr_1m_pool_wait",
 	"ib_rdma_mr_1m_pool_depleted",
+	"ib_rdma_mr_8k_reused",
+	"ib_rdma_mr_1m_reused",
 	"ib_atomic_cswp",
 	"ib_atomic_fadd",
 };
-- 
1.9.1

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[net-next][PATCH 00/13] RDS: Major clean-up with couple of new features for 4.6 Santosh Shilimkar <santosh.shilimkar@oracle.com> - 2016-02-20 12:40 +0100
  [net-next][PATCH 07/13] RDS: IB: move FMR code to its own file Santosh Shilimkar <santosh.shilimkar@oracle.com> - 2016-02-20 12:40 +0100
  [net-next][PATCH 13/13] RDS: IB: Support Fastreg MR (FRMR) memory registration mode Santosh Shilimkar <santosh.shilimkar@oracle.com> - 2016-02-20 12:40 +0100
  [net-next][PATCH 10/13] RDS: IB: add mr reused stats Santosh Shilimkar <santosh.shilimkar@oracle.com> - 2016-02-20 12:40 +0100
  [net-next][PATCH 12/13] RDS: IB: allocate extra space on queues for FRMR support Santosh Shilimkar <santosh.shilimkar@oracle.com> - 2016-02-20 12:40 +0100
  [net-next][PATCH 04/13] RDS: IB: Remove the RDS_IB_SEND_OP dependency Santosh Shilimkar <santosh.shilimkar@oracle.com> - 2016-02-20 12:40 +0100
  [net-next][PATCH 11/13] RDS: IB: add Fastreg MR (FRMR) detection support Santosh Shilimkar <santosh.shilimkar@oracle.com> - 2016-02-20 12:40 +0100
    Re: [net-next][PATCH 11/13] RDS: IB: add Fastreg MR (FRMR)  detection support David Miller <davem@davemloft.net> - 2016-02-22 04:40 +0100
      Re: [net-next][PATCH 11/13] RDS: IB: add Fastreg MR (FRMR) detection  support santosh shilimkar <santosh.shilimkar@oracle.com> - 2016-02-22 17:40 +0100
  [net-next][PATCH 08/13] RDS: IB: add connection info to ibmr Santosh Shilimkar <santosh.shilimkar@oracle.com> - 2016-02-20 12:40 +0100
  [net-next][PATCH 09/13] RDS: IB: handle the RDMA CM time wait event Santosh Shilimkar <santosh.shilimkar@oracle.com> - 2016-02-20 12:40 +0100
  [net-next][PATCH 05/13] RDS: IB: Re-organise ibmr code Santosh Shilimkar <santosh.shilimkar@oracle.com> - 2016-02-20 12:50 +0100
  [net-next][PATCH 01/13] RDS: Drop stale iWARP RDMA transport Santosh Shilimkar <santosh.shilimkar@oracle.com> - 2016-02-20 12:50 +0100
  [net-next][PATCH 02/13] RDS: Add support for SO_TIMESTAMP for incoming messages Santosh Shilimkar <santosh.shilimkar@oracle.com> - 2016-02-20 12:50 +0100
  [net-next][PATCH 03/13] MAINTAINERS: update RDS entry Santosh Shilimkar <santosh.shilimkar@oracle.com> - 2016-02-20 12:50 +0100

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