From: Sagi Grimberg <sagig@mellanox.com>
Date: Tue, 14 Apr 2015 15:08:23 +0000 (+0300)
Subject: IB/iser: Make fastreg pool cache friendly
X-Git-Tag: firefly_0821_release~176^2~1881^2^3~5
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=8b95aa2c1bf8c936e5b0e9096b180a3e4f5327ff;p=firefly-linux-kernel-4.4.55.git

IB/iser: Make fastreg pool cache friendly

Memory regions are resources that are saved
in the device caches. Increase the probability for
a cache hit by adding the MRU descriptor to pool
head.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
---

diff --git a/drivers/infiniband/ulp/iser/iser_memory.c b/drivers/infiniband/ulp/iser/iser_memory.c
index 17a5d70dcc8a..45f512043ef5 100644
--- a/drivers/infiniband/ulp/iser/iser_memory.c
+++ b/drivers/infiniband/ulp/iser/iser_memory.c
@@ -63,7 +63,7 @@ iser_reg_desc_put(struct ib_conn *ib_conn,
 	unsigned long flags;
 
 	spin_lock_irqsave(&ib_conn->lock, flags);
-	list_add_tail(&desc->list, &ib_conn->fastreg.pool);
+	list_add(&desc->list, &ib_conn->fastreg.pool);
 	spin_unlock_irqrestore(&ib_conn->lock, flags);
 }