On Thu, Mar 23, 2017 at 10:04:09AM +0100, Marta Rybczynska wrote: > In the case of small NVMe-oF queue size (<32) we may enter > a deadlock caused by the fact that the IB completions aren't sent > waiting for 32 and the send queue will fill up. > > The error is seen as (using mlx5): > [ 2048.693355] mlx5_0:mlx5_ib_post_send:3765:(pid 7273): > [ 2048.693360] nvme nvme1: nvme_rdma_post_send failed with error code -12 > > The patch doesn't change the behaviour for remote devices with > larger queues. Thanks, this looks useful. But wouldn't it be better to do something like queue_size divided by 2 or 4 to get a better refill latency? -- 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
