From: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx> Compared to the RFC I sent yesterday, this version retains the per-port spinlock for use when looking up the MAD agent by vendor/class/etc. Now we should only see a performance improvement relative to the current code. We should see that improvement two different ways: interrupts remain enabled and no spinlock is taken when doing a lookup in the IDR, and we don't walk a linked list looking for the right agent; we just walk the (low height) tree and find the correct agent. There are more improvements that could be made, but this fixes the mlx4 bug that Hans reported. Matthew Wilcox (2): IB/mad: Agent registration is process context only IB/mad: Use IDR for agent IDs drivers/infiniband/core/mad.c | 90 ++++++++++++++++++------------ drivers/infiniband/core/mad_priv.h | 7 ++- include/linux/idr.h | 9 +++ 3 files changed, 66 insertions(+), 40 deletions(-) -- 2.17.1 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
