Messages in this thread Patch in this message | | | From | Anand Khoje <> | Subject | [PATCH v2 2/3] IB/core: Shuffle locks in ib_port_data to save memory | Date | Thu, 3 Jun 2021 12:20:23 +0530 |
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pahole shows two 4-byte holes in struct ib_port_data after pkey_list_lock and netdev_lock respectively.
Shuffling the netdev_lock to be after pkey_list_lock, this shaves off eight bytes from the struct.
Suggested-by: Haakon Bugge <haakon.bugge@oracle.com> Signed-off-by: Anand Khoje <anand.a.khoje@oracle.com> --- include/rdma/ib_verbs.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index 7e2f369..41cbec5 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -2175,11 +2175,13 @@ struct ib_port_data { struct ib_port_immutable immutable; spinlock_t pkey_list_lock; + + spinlock_t netdev_lock; + struct list_head pkey_list; struct ib_port_cache cache; - spinlock_t netdev_lock; struct net_device __rcu *netdev; struct hlist_node ndev_hash_link; struct rdma_port_counter port_counter; -- 1.8.3.1
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