RDS: use kfree_rcu in rds_ib_remove_ipaddr (59fe4606) · Commits · 戴 / test

synchronize_rcu() slowing down un-necessarily the socket shutdown path. It is used just kfree() the ip addresses in rds_ib_remove_ipaddr() which is perfect usecase for kfree_rcu(); So lets use that to gain some speedup. Signed-off-by:

Santosh Shilimkar <ssantosh@kernel.org> Signed-off-by:

Santosh Shilimkar <santosh.shilimkar@oracle.com>

net/rds/ib.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -164,6 +164,7 @@ struct rds_ib_connection {
		struct rds_ib_ipaddr {
		struct list_head list;
		__be32 ipaddr;
		struct rcu_head rcu;
		};

		struct rds_ib_device {

net/rds/ib_rdma.c

+2 −4

Original line number	Diff line number	Diff line
		@@ -159,10 +159,8 @@ static void rds_ib_remove_ipaddr(struct rds_ib_device *rds_ibdev, __be32 ipaddr)
		}
		spin_unlock_irq(&rds_ibdev->spinlock);

		if (to_free) {
		synchronize_rcu();
		kfree(to_free);
		}
		if (to_free)
		kfree_rcu(to_free, rcu);
		}

		int rds_ib_update_ipaddr(struct rds_ib_device *rds_ibdev, __be32 ipaddr)

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