[net-next][PATCH v2 10/13] RDS: IB: add mr reused stats

[Santosh Shilimkar]

Add MR reuse statistics to RDS IB transport.

Signed-off-by: Santosh Shilimkar <ssant...@kernel.org>
Signed-off-by: Santosh Shilimkar <santosh.shilim...@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 0e84843..ec7ea32 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